seniora.org, vom 22. Februar 2026, 04.03.2024 JAMA-Studie - übernommen von jamanetwork.com/jamapediatrics
(Red.) Weil der Gebrauch von Smartphone und Tablet für Säuglinge und Kleinkinder ein absolutes Tabu sein sollte, das entsprechende Wissen, mit dramatischen Folgen für Spracherwerb und Persönlichkeitsentwicklung des Nachwuchses, jedoch bei Eltern und Pädagogen kaum vorhanden ist, veröffentlichen wir einen gekürzten Auszug einer JAMA-Studie aus dem Jahr 2024. Das englische Original mit allen Details befindet sich am Ende des deutschen Auszugs.(ww.)
Frage Welcher Zusammenhang besteht zwischen der Bildschirmzeit und den gesprochenen Wörtern von Erwachsenen, den Lautäußerungen von Kindern und den Gesprächsrunden, wenn Kinder zwischen 12 und 36 Monaten alt sind?
Ergebnisse Diese Kohortenstudie ergab einen negativen Zusammenhang zwischen der Bildschirmzeit und den Messwerten für die Eltern-Kind-Gespräche in diesen frühen Jahren. Mit jeder zusätzlichen Minute Bildschirmzeit hörten die Kinder weniger Wörter von Erwachsenen, äußerten weniger Laute und nahmen an weniger wechselseitigen Interaktionen teil.
Bedeutung Diese Studie legt nahe, dass die Bildschirmzeit ein Mechanismus ist, der Kinder daran hindern kann, in den ersten Lebensjahren eine sprachreiche häusliche Umgebung zu erleben. Maßnahmen zur Förderung des frühen Sprachgebrauchs sollten daher auch die Unterstützung bei der Steuerung der Bildschirmzeit umfassen.
Zusammenfassung
Bedeutung Das Aufwachsen in einem sprachreichen häuslichen Umfeld ist wichtig für die Sprachentwicklung von Kindern in den ersten Lebensjahren. Das Konzept der „Technoferenz” (technologiebasierte Störung) ) deutet darauf hin, dass Bildschirmzeit die Möglichkeiten für Gespräche und Interaktionen zwischen Eltern und Kindern beeinträchtigen kann; es gibt jedoch nur wenige Längsschnittstudien, die diesen Zusammenhang untersuchen.
Ziel Untersuchung des Längsschnittzusammenhangs zwischen Bildschirmzeit und drei Messgrößen für Eltern-Kind-Gespräche (Wörter der Erwachsenen, Lautäußerungen der Kinder und Gesprächsanteile) bei Kindern im Alter von 12 bis 36 Monaten.
Design, Setting und Teilnehmer Diese australische prospektive Kohortenstudie verwendete fortschrittliche Spracherkennungstechnologie, um die Bildschirmzeit und das Sprachumfeld zu Hause von Kleinkindern an einem durchschnittlichen 16-Stunden-Tag zu erfassen. Die Daten wurden alle sechs Monate in den Familienheimen von 220 Familien erhoben, als die Kinder 12, 18, 24, 30 und 36 Monaten alt waren, vom 1. Januar 2018 bis zum 31. Dezember 2021 erhoben. Die statistische Analyse erfolgte vom 1. November 2022 bis zum 31. Juli 2023.
Exposition Die LENA-Technologie (Language Environment Analysis) lieferte automatisierte Zählungen der Sprachumgebung der Kinder und ihrer Exposition gegenüber elektronischen Geräuschen. Die Exposition von Interesse war die Bildschirmzeit, die auf der Grundlage einer manuellen Kodierung der LENA-Audiosegmente mit elektronischen Geräuschen berechnet wurde.
Wichtigste Ergebnisse und Messgrößen Drei Messgrößen der Eltern-Kind-Kommunikation standen im Mittelpunkt: Wörter der Erwachsenen, Kinderlaute und Gesprächswechsel. Für jedes der drei Ergebnisse wurden separate Modelle durchgeführt, die eine Anpassung für das Geschlecht des Kindes, das Alter des Kindes, das Bildungsniveau der Mutter, die Anzahl der Kinder im Haushalt, die Anzahl der Aktivitäten zu Hause und die psychische Belastung der primären Betreuungsperson enthielten.
Ergebnisse Die Studie umfasste 220 Familien (120 Mädchen [54,6 %]; mittleres [SD] Gestationsalter der Kinder 39,3 [1,5] Wochen; mittleres [SD] Alter der Mutter bei der Geburt 31,3 [4,8] Jahre). Angepasste lineare Modelle mit gemischten Effekten zeigten, dass eine Zunahme der Bildschirmzeit mit einer Abnahme der Eltern-Kind-Gespräche einherging. Die größten Abnahmen wurden nach 36 Monaten beobachtet, als eine zusätzliche Minute Bildschirmzeit mit einer Abnahme von 6, 6 (95 % CI, −11,7 bis −1,5) Wörter der Erwachsenen, 4,9 (95 % CI, −6,1 bis −3,7) Lautäußerungen der Kinder und 1,1 (95 % CI, −1,4 bis −0, 8) Gesprächswechsel verbunden war.
Schlussfolgerung und Relevanz Die Ergebnisse dieser Studie stützen die Annahme einer Technoferenz für australische Familien, wonach die Bildschirmzeit kleiner Kinder die Möglichkeiten zum Sprechen und zur Interaktion in ihrer häuslichen Umgebung beeinträchtigt. Diese Erkenntnis hat Auswirkungen auf Interventionen und Unterstützungsmaßnahmen zur Förderung einer sprachreichen sprachreichen häuslichen Umgebung fördern sollen, wobei Familien Unterstützung benötigen, um den möglichen Zusammenhang zwischen Bildschirmzeit und den Möglichkeiten für Kinder und Erwachsene, in ihrer häuslichen Umgebung zu sprechen und zu interagieren, zu verstehen.
Einleitung
Die Bedeutung einer sprachreichen häuslichen Umgebung in den ersten Lebensjahren ist allgemein anerkannt.1 Vorhandene Belege deuten auf einen positiven Zusammenhang zwischen frühkindlicher Sprachförderung und der Sprachentwicklung von Kindern,2 –5 der sozial-emotionalen Entwicklung,6 dem IQ,7 und der Gehirnfunktion hin.8 –10 Infolgedessen Programme, die darauf abzielen, die Anzahl der Gespräche zwischen Eltern und Kindern in den Haushalten von Kleinkindern zu erhöhen, immer beliebter.11 –13 Schätzungen zum Sprachumfeld zu Hause in Australien und den USA haben große Unterschiede zwischen den Familien gezeigt.14 -16
Mit Kindern zu sprechen mag einfach und unkompliziert erscheinen, doch im hektischen Familienalltag ist dies oft alles andere als einfach. Es ist wichtig, potenzielle Faktoren im häuslichen Umfeld zu untersuchen, die die Möglichkeiten der Eltern, mit ihren Kindern zu sprechen und zu interagieren, beeinträchtigen könnten, um Maßnahmen zum Aufbau einer sprachreichen sprachreiche häusliche Umgebung zu schaffen und damit die Sprachentwicklung der Kinder zu fördern.
Eine wachsende Zahl von Belegen untersucht den Zusammenhang zwischen Bildschirmzeit und Eltern-Kind-Gesprächen, die die Sprache der Erwachsenen, die Lautäußerungen der Kinder und die wechselseitigen Interaktionen umfassen.17, 18 Das als „Technoference” (technologiebasierte Störung) bezeichnete Phänomen legt nahe, dass die Zeit, die Eltern mit Bildschirmgeräten verbringen, die täglichen Gelegenheiten zum Sprechen und Reagieren auf ihr Kind beeinträchtigt.19 Eine kürzlich durchgeführte systematische Überprüfung hat gezeigt, dass die Nutzung von Smartphones durch Eltern einen negativen Einfluss auf die Reaktionsfähigkeit und Aufmerksamkeit der Eltern gegenüber ihren Kindern im Alter von 3 Jahren oder jünger hat. 17
Eine weitere systematische Überprüfung, die die Nutzung mobiler Computergeräte durch Eltern und die soziale und emotionale Entwicklung von Kindern im Alter von 10 Jahren oder jünger untersuchte, ergab weniger Engagement, härtere Reaktionen und weniger verbale und nonverbale Kommunikation zwischen Eltern und Kindern, wenn Eltern ein mobiles Gerät nutzten.20 Dennoch haben viele der in den systematischen Überprüfungen zitierten Studien die Bildschirmzeit nur in einem begrenzten Kontext (z. B. während der Mahlzeiten, auf einem Spielplatz im Freien) betrachtet und sind oft querschnittsorientiert.
Außerdem haben sie sich auf die Bildschirmzeit der Eltern (in der Regel die Nutzung von Mobiltelefonen) konzentriert, anstatt die Bildschirmzeit von Erwachsenen und Kindern auf einer Reihe von Geräten zu betrachten. Schließlich stützen sich viele Studien stark auf von den Eltern angegebene Messungen der Bildschirmzeit und der Interaktion oder Reaktionsfähigkeit, die im Vergleich zu objektiven Messungen möglicherweise weniger genau sind und zu sozial erwünschten Antworten neigen.
Eine Ausnahme bildet eine Studie, in der Spracherkennungstechnologie eingesetzt wurde, um den Zusammenhang zwischen hörbarem Fernsehen und den Worten von Erwachsenen, den Lautäußerungen von Kindern und den Gesprächsbeiträgen von Kindern im Alter von 2 bis 48 Monaten (n = 329) zu untersuchen.18 In dieser Studie wurde die Anzahl der Lautäußerungen und Gesprächsbeiträge eines einzelnen Kindes an Tagen mit hoher Fernsehexposition mit der Anzahl der Tage mit geringer Fernsehexposition verglichen. Dabei wurde festgestellt, dass hörbares Fernsehen mit einer Verringerung der altersbereinigten Z-Werten für Kinderlaute (−0,3 [95 % KI, −0,3 bis −0,2]) und Gesprächsbeiträgen (−0,2 [95 % KI, −0,3 bis −0,2]).
Sie zeigte auch, dass Erwachsene für jede zusätzliche Stunde hörbares Fernsehen 770 Wörter weniger (95 % KI, −1004 bis −535 Wörter) zu ihrem Kind sprachen. Diese Studie wurde 2009 veröffentlicht, vor der zunehmenden Nutzung mobiler Technologien, die wahrscheinlich die Art und Weise verändert haben, wie die Bildschirmzeit mit Gesprächen zwischen Eltern und Kindern in Verbindung gebracht wird, im Vergleich zur reinen Fernsehnutzung.
Die vorliegende Studie zielt darauf ab, den longitudinalen Zusammenhang zwischen der Bildschirmnutzung eines Kindes und drei Messgrößen für Gespräche zwischen Eltern und Kindern zu verstehen: (1) Wörter von Erwachsenen, (2) Lautäußerungen von Kindern und (3) Interaktionen zwischen Eltern und Kindern (oder Gesprächsbeiträge) in den ersten drei Lebensjahren. Diese Forschung baut auf der vorhandenen Literatur auf und verwendet Daten aus einer aktuellen prospektiven Kohortenstudie, die 2017 begonnen hat und einen neuartigen Ansatz zur Messung der Bildschirmzeit verwendet.14,15
Diskussion
Die vorliegende Studie verwendete Daten aus einer prospektiven Kohortenstudie, in der Längsschnittdaten von Kindern im Alter zwischen 12 und 36 Monaten analysiert wurden, um den Zusammenhang zwischen der Bildschirmzeit von Kindern und drei Messgrößen für Eltern-Kind-Gespräche (Wörter von Erwachsenen, Kinderlaute und Gesprächswechsel) untersucht. Die Ergebnisse der Mixed-Effects-Modelle zeigten, dass mit jeder zusätzlichen Minute Bildschirmzeit Eltern und Kinder im Allgemeinen weniger miteinander sprachen oder Laute von sich gaben und weniger wechselseitige Interaktionen hatten. Dieser Zusammenhang war in den unbereinigten Modellen weniger deutlich, wobei zu einigen Zeitpunkten in den Modellen für Kinderlaute und Gesprächswechsel keine Zusammenhänge erkennbar waren. In den bereinigten Modellen, die mehrere Störfaktoren in Bezug auf Kinder und Familien berücksichtigten,
zeigte sich ein negativer Zusammenhang zwischen Bildschirmzeit und Eltern-Kind-Gesprächen, was die wichtige Rolle des Bildungsniveaus der Mutter, des Geschlechts des Kindes, der psychischen Belastung der primären Bezugsperson und der Anzahl der Aktivitäten zu Hause unterstreicht. Konkret hörten Kinder im Alter von 36 Monaten in den angepassten Modellen pro zusätzlicher Minute Bildschirmzeit 6,6 weniger Wörter von Erwachsenen, gaben 4,9 weniger Laute von sich und nahmen an 1,1 weniger Gesprächsrunden teil. Dieses Ergebnis steht im Einklang mit dem Konzept der Technoferenz und der vorhandenen Literatur, die darauf hindeuten, dass eine Zunahme der Bildschirmzeit die Eltern-Kind-Interaktionen verringert.17,18, 20
Für Familien, die sich an die aktuellen Richtlinien der Weltgesundheitsorganisation zur Bildschirmzeit halten (z. B. 1 Stunde pro Tag im Alter von 36 Monaten),26 deuten die vorliegenden Ergebnisse darauf hin, dass Kinder täglich etwa 397 Wörter von Erwachsenen (d. h. 6,62 × 60 Minuten), 294 Lautäußerungen und 68 Gesprächsbeiträgen pro Tag entgehen könnten. Laut der vorliegenden Studie sowie internationalen Schätzungen27 überschreiten Kinder im Durchschnitt diese Bildschirmzeitrichtlinien. Ersetzt man 1 Stunde (60 Minuten) durch die durchschnittliche Bildschirmzeit, der Kinder im Alter von 36 Monaten in dieser Studie ausgesetzt waren (172 Minuten) ersetzen, könnten Kinder täglich 1139 Wörter von Erwachsenen, 843 Lautäußerungen und 194 Gesprächsbeiträge verpassen.
Diese Schätzungen gehen von einem linearen Zusammenhang zwischen Bildschirmzeit und Eltern-Kind-Gesprächen aus; es ist jedoch auch möglich, dass eine Abnahme der Eltern-Kind-Gespräche erst nach Erreichen einer bestimmten Schwelle der Bildschirmnutzung auftritt. Dies sollte ein wichtiger Ansatzpunkt für zukünftige Forschungen sein, um aktualisierte Richtlinien für die Bildschirmzeit zu erstellen.
Ein sprachreiches Zuhause ist entscheidend für die Sprachentwicklung von Kindern2 –5, was die Schulreife und den Erfolg im gesamten Bildungssystem fördert. 28,29 Diese Studie fand einen negativen Zusammenhang zwischen Bildschirmzeit und Eltern-Kind-Gesprächen, was darauf hindeutet, dass die Bildschirmzeit ein potenzieller Mechanismus ist, der als Grundlage für eine Intervention zur Förderung eines häuslichen Umfelds mit mehr Eltern-Kind-Gesprächen dienen könnte.
Die Auswirkungen müssen jedoch im Kontext der Realität des heutigen Familienlebens betrachtet werden. Es ist unrealistisch anzunehmen, dass alle Familien einfach aufhören werden, Bildschirme mit ihren kleinen Kindern zu nutzen. Stattdessen könnten sich Programme und Richtlinien darauf konzentrieren, Familien zu ermutigen, die Bildschirmzeit als Gelegenheit zur Interaktion mit ihrem Kind zu nutzen. Das Konzept des interaktiven gemeinsamen Fernsehens ist eine zunehmend beliebte Strategie für die Bildschirmzeit von Kindern und zeigt Verbesserungen bei den Sprachfähigkeiten der Kinder.30 Bei dieser Strategie interagieren die Eltern während der Bildschirmzeit mit dem Kind, um den pädagogischen Nutzen zu fördern.
Wenn interaktives gemeinsames Fernsehen nicht möglich ist, könnten altersgerechte, hochwertige Bildungsprogramme eingesetzt werden, die so konzipiert sind, dass sie die Sprachentwicklung des Kindes fördern.30 Die Förderung dieser Ansätze im Rahmen von Interventionen, die darauf abzielen, die Eltern-Kind-Interaktion und den Sprachkontakt zu fördern, könnte die Verdrängung von Eltern-Kind-Gesprächen durch die Bildschirmzeit teilweise ausgleichen. Zukünftige Forschungen werden darauf abzielen, die Qualität der Bildschirmzeit von Kindern innerhalb des EUiLO-Datensatzes zu untersuchen, um diese Ansätze zu untermauern, was jedoch außerhalb des Rahmens der vorliegenden Studie lag.
Stärken und Grenzen
Diese Studie hat einige Stärken. Sie ist eine der wenigen Längsschnittuntersuchungen zu Bildschirmzeit und Eltern-Kind-Gesprächen in den ersten Lebensjahren. Sie ist auch insofern einzigartig, als sie Spracherkennungstechnologie einsetzt, um sowohl die Bildschirmzeit als auch die Eltern-Kind-Gespräche zu messen. Schließlich konnten wir eine umfassende Reihe von Störvariablen kontrollieren, was bisher nur wenige Studien getan haben.
Dennoch gibt es Einschränkungen, die berücksichtigt werden müssen. Erstens wurden in dieser Analyse keine Daten aus der Zeit, als die Kinder 6 Monate alt waren, berücksichtigt. Diese Auslassung war auf einen kritischen Störfaktor zurückzuführen (von den Eltern selbst angegebene psychische Belastung), , die in dieser Datenerhebungswelle nicht gemessen wurde. Da es Hinweise darauf gibt, dass Eltern mit psychischen Problemen weniger wahrscheinlich mit ihren kleinen Kindern interagieren31 und eher Bildschirmzeit nutzen32,33, wurde beschlossen, diese Welle nicht in die vorliegende Analyse einzubeziehen.
Es gibt auch potenzielle Einschränkungen bei der Klassifizierung der Bildschirmzeit auf der Grundlage der aus der LENA-Software extrahierten Audioaufzeichnungen. Da wir keinen Zugriff auf das begleitende Videomaterial hatten, besteht die Möglichkeit, dass nicht bildschirmbasierte elektronische Geräte fälschlicherweise als Bildschirmnutzung kodiert wurden oder dass ein Teil der Bildschirmzeit nicht erfasst wurde, wenn kein Begleitgeräusch vorhanden war.
Es wurde versucht, diese Möglichkeit durch eine umfassende Schulung aller Forscher zu minimieren, und alle Unsicherheiten wurden von einem anderen Forscher überprüft. Schließlich führten einige Familien innerhalb der Studie ihre 30- oder 36-monatige LENA-Aufzeichnung während der COVID-19-Pandemie durch. Obwohl einige Hinweise darauf hindeuten, dass die Pandemie die Bildschirmzeit der Familien erhöht haben könnte,34 scheint die durchschnittliche Bildschirmzeit unserer Teilnehmer im Vergleich zu australischen Schätzungen vor der Pandemie35 nicht wesentlich zugenommen zu haben.
Schlussfolgerungen
Die Ergebnisse dieser prospektiven Kohortenstudie deuten darauf hin, dass eine Zunahme der Bildschirmzeit mit einer Abnahme der Wortzahl der Erwachsenen, der Lautäußerungen der Kinder und der wechselseitigen Interaktionen bei Kindern im Alter zwischen 18 und 36 Monaten einherging, nachdem bekannte Störfaktoren kontrolliert worden waren. Interventionen sollten sich darauf konzentrieren, Hindernisse für eine sprachreiche häusliche Umgebung abzubauen, wobei der Schwerpunkt auf der Unterstützung der Bildschirmnutzung durch die Familie liegen sollte . Angesichts der allgegenwärtigen Präsenz von Bildschirmzeit im Familienleben könnte es eine wichtige Strategie zur Unterstützung von Familien sein, verschiedene Möglichkeiten zu identifizieren, wie Bildschirmzeit die Eltern-Kind-Interaktion fördern kann, beispielsweise durch interaktives gemeinsames Fernsehen.
_______
Original Investigation
Screen Time and Parent-Child Talk When Children Are Aged 12 to 36 Months- Mary E. Brushe, PhD1,2; Dandara G. Haag, PhD2; Edward C. Melhuish, PhD3
- et al
- Author Affiliations
- Article Information
JAMA Pediatr
Published Online: March 4, 2024
2024;178;(4):369-375. doi:10.1001/jamapediatrics.2023.6790
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Key Points
Question What is the association between screen time and adult words spoken, child vocalizations, and conversational turns when children are 12 to 36 months of age?
Findings This cohort study found a negative association between screen time and measures of parent-child talk across those early years. For every additional minute of screen time, children heard fewer adult words, spoke fewer vocalizations, and engaged in fewer back-and-forth interactions.
Meaning This study suggests that screen time is a mechanism that may be getting in the way of children experiencing a language-rich home environment during the early years; interventions aiming to promote early use of language should include support to manage screen time.
Abstract
Importance Growing up in a language-rich home environment is important for children’s language development in the early years. The concept of “technoference” (technology-based interference) suggests that screen time may be interfering with opportunities for talk and interactions between parent and child; however, limited longitudinal evidence exists exploring this association.
Objective To investigate the longitudinal association between screen time and 3 measures of parent-child talk (adult words, child vocalizations, and conversational turns) when children are 12 to 36 months of age.
Design, Setting, and Participants This Australian prospective cohort study used advanced speech recognition technology to capture young children’s screen time and home language environment, on an average 16-hour day. Data were collected from 220 families once every 6 months in the family home when children were 12, 18, 24, 30, and 36 months of age, from January 1, 2018, to December 31, 2021. Statistical analysis took place from November 1, 2022, to July 31, 2023.
Exposure Language Environment Analysis (LENA) technology provided automated counts of children’s language environment and exposure to electronic noise. The exposure of interest was screen time, which was calculated based on manual coding of LENA electronic noise audio segments.
Main Outcomes and Measures Three measures of parent-child talk were outcomes of focus: adult words, child vocalizations, and conversational turns. Separate models were run for each of the 3 outcomes and included adjustment for child sex, child age, maternal educational level, number of children at home, number of home activities, and primary caregiver’s psychological distress.
Results The study included 220 families (120 girls [54.6%]; mean [SD] gestational age of children, 39.3 [1.5] weeks; mean [SD] age of mother at childbirth, 31.3 [4.8] years). Adjusted linear mixed-effect models demonstrated that increases in screen time were associated with decreases in measures of parent-child talk. The largest decreases were seen at 36 months, when an additional minute of screen time was associated with a reduction of 6.6 (95% CI, −11.7 to −1.5) adult words, 4.9 (95% CI, −6.1 to −3.7) child vocalizations, and 1.1 (95% CI, −1.4 to −0.8) conversational turns.
Conclusion and Relevance Findings of this study support the notion of technoference for Australian families, whereby young children’s exposure to screen time is interfering with opportunities to talk and interact in their home environment. This finding has implications for interventions and supports aimed at promoting a language-rich home environment, with families needing support in understanding the potential association of screen time with opportunities for children and adults to talk and interact in their home environment.
Introduction
The importance of a language-rich home environment during the early years of life has been well established.1 Existing evidence indicates positive associations between early language exposure and children’s language development,2-5 socioemotional development,6 IQ,7 and brain function.8-10 As a result, programs aiming to increase the amount of parent-child talk in young children’s homes have become increasingly popular.11-13 Estimates of the home language environment in Australia and the US have shown large variability among families.14-16 Talking with children may seem an easy and simple activity; however, in the busy lives of families, it may be anything but simple. It is crucial to investigate potential factors within the home environment that may interrupt parents’ opportunities to talk and interact with their children to help inform interventions aimed at building a language-rich home environment and, in turn, support children’s language development.
A growing body of evidence has examined the associations between screen time and parent-child talk, which encompasses adult words, child vocalizations, and back-and-forth interactions.17,18 The phenomenon coined “technoference” (technology-based interference) suggests that parents’ time using screen-based devices interferes with daily opportunities to talk and respond to their child.19 A recent systematic review demonstrated that parental smartphone use was negatively associated with parental responsiveness and attention toward their children aged 3 years or younger.17 Another systematic review investigating parental use of mobile computing devices and the social and emotional development of children aged 10 years or younger found less engagement, harsher responses, and fewer verbal and nonverbal communications between parents and children when parents were using a mobile device.20 Nonetheless, many of the studies cited in the systematic reviews have considered screen time only within limited context (eg, during meals, at an outdoor playground) and are often cross-sectional. They have also focused on parent’s screen time (usually mobile telephone use), rather than considering both the adult’s and child’s screen time across a range of devices. Finally, many studies rely heavily on parent-reported measures of screen time and interaction or responsiveness, which may be less accurate and prone to socially desirable responses compared with objective measures.
One exception is a study that used speech recognition technology to understand the association of audible television with adult words, child vocalizations, and conversational turns among children aged 2 to 48 months (n = 329).18 This study compared the number of vocalizations and conversational turns that an individual child experienced on the number of days with high exposure to television with the number of days with low exposure to television and found that audible television was associated with reductions in age-adjusted z scores for child vocalizations (−0.3 [95% CI, −0.3 to −0.2]) and conversational turns (−0.2 [95% CI, −0.3 to −0.2]). It also demonstrated that for every additional hour of audible television, adults spoke 770 fewer words (95% CI, −1004 to −535 words) to their child. That study was published in 2009, prior to the increase in mobile technology use, which has likely changed the way that screen time is associated with parent-child talk compared with television exposure only.
The present study aims to understand the longitudinal association between a child’s screen exposure and 3 measures of parent-child talk: (1) adult words, (2) child vocalizations, and (3) parent-child interactions (or conversational turns), in the first 3 years of life. This research builds on existing literature by using data from a recent prospective cohort study that began in 2017 and uses a novel approach to measuring screen time.14,15
Methods
Study Design
The Language in Little Ones (LiLO) study is a prospective cohort study (n = 302) that collected data biannually from 6 months of age until children reached school age (approximately 5 years of age). The LiLO study aimed to understand young Australian children’s home language environment, quantified by the amount of language children heard and spoke. Parent-child talk was captured once every 6 months, for 16 hours, using advanced speech recognition technology called Language Environment Analysis (LENA). The LENA technology automatically quantified the number of adult words, the number of vocalizations made by the child, and the number of conversational turns between the adult and child. LENA also calculated the amount of time children were exposed to television or electronic noise. Following stakeholder and community interest in better understanding screen time in early childhood, a nested study of LiLO was established called the Electronic Use in Little Ones (EUiLO) study. The EUiLO study focused on coding the television or electronic noise data that had already been collected in the first 3 years of the LiLO study, from January 1, 2018, to December 31, 2021, to provide a measure of screen exposure, which differentiated between screen time and other electronic sounds (ie, electronic appliances). Participants were compensated with a $10 supermarket voucher after each wave of data collection. The University of Western Australia human research ethics committee granted ethics approval for both studies, and participants provided informed written consent. The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) reporting guideline for cohort studies was followed in the preparation of this article.21
Participants
Families were recruited antenatally and postnatally for the LiLO study across South Australia, Western Australia, and Queensland. Further details on recruitment efforts have been previously reported.14 Eligibility criteria included (1) children born in 2017, (2) predominately English spoken in the home due to the validity of the LENA technology at the time of recruitment, (3) children born at 37 weeks’ or more gestation, (4) singleton children, and (5) the child did not have a diagnosed cause of language impairment. A key focus of the LiLO study was to understand socioeconomic inequalities in early language, and as such there was an additional eligibility criterion focused on maternal educational level. Mothers who completed a university degree (bachelor’s degree or higher) were classified into a high education group, and mothers who had no postsecondary school education were classified into a low education group. Mothers whose educational level could not be categorized into either group (ie, those with certificate-level qualifications) were ineligible for the study.
A total of 302 families participated in the LiLO study. Retrospective consent was sought from participants still active in the LiLO study in 2020 (n = 277) to undertake the additional coding by researchers (see Procedures subsection) and the analyses of television or electronic noise data for the EUiLO study. A total of 55 families did not consent to the EUiLO study, and 2 families were also removed from the study due to their child developing a diagnosed cause of language impairment, which left a total of 220 families in the analysis sample for the present study (Figure).
Figure. Flowchart of Participation for the Final Analysis Sample
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EUiLO indicates Electronic Use in Little Ones; and LiLO, Language in Little Ones.
aNot consenting to participate in the EUiLO study meant that these participants did not have valid data on screen time.
Measures
The exposure (screen time) and outcome measures (3 measures of parent-child talk) were captured using the LENA technology. This technology includes a specially designed t-shirt or vest with a pocket in the front to hold a small digital language processor (DLP), which records all the audio around the child for 16 hours. The LENA software then processes the audio through algorithmic speech signal analysis and provides automated counts of adult words, child vocalizations, conversational turns, and exposure to television or electronic noise.22 The automated counts for adult words include any words spoken within an approximately 3-m radius of the child wearing the LENA DLP, whether directed at the child or not. The families were instructed to choose an average home day for the child to wear the t-shirt and DLP. This could not be a day when the child attended childcare, when the child was sick, or when the child was going to attend loud public events (eg, a sporting match). Evidence suggests good reliability of the LENA technology, with high consistency between counts generated by LENA and human transcribers for each measure of parent-child talk.23 The level of agreement, however, was lower for television or electronic noise data (71%) compared with language measures (eg, 81% for adult words).
Child and family characteristics that may be associated with the link between screen time and parent-child talk were determined a priori and measured via parent report at the biannual home visit. The confounders included in the study were child’s sex (male or female), child’s age in months (to account for any variation in the exact age the child completed the LENA recording day), mother’s highest level of education (high or low), primary caregiver’s self-reported psychological distress (measured using the Kessler 6-question scale,24 where a score of 0-7 indicates low distress; a score of 8-12, moderate distress; and a score of 13-24, high distress), the mean number of home activities (eg, singing, outdoor play) completed with the child, and the number of other children living in the home.
Procedures
Data from the second to the sixth wave of data collection in the LiLO study and the EUiLO study were collected between January 1, 2018, and December 31, 2021. Once every 6 months, a researcher would visit the family home and complete the standardized questionnaires and demonstrate the use of the LENA equipment. The family was then asked to complete their “recording day” within approximately 2 weeks, before the researcher returned to collect the equipment. The audio recording was uploaded to the LENA software, automatically providing counts of parent-child talk variables and television or electronic noise exposure. As part of participation in the EUiLO study, researchers would export the audio in 5-minute segments when LENA flagged electronic noise during the 16-hour day. Researchers then listened to these audio segments to assess the type of electronic noise (eg, was the child exposed to a screen or a microwave beeping?). Within each segment, both parent-child talk and electronic noise could be occurring simultaneously. If language was occurring, this was captured separately in the automatic counts of parent-child talk variables. Therefore, the coding of each segment focused on categorizing the electronic noise as screen media, music, noise, or sleeping based on audio cues, such as media content theme songs or character voices, identification of a familiar noise (eg, car starting or microwave), contextual conversations (eg, the child asks for iPad), and what was reported in an accompanying activity diary completed by the parent. When the source of the noise could not be determined by multiple coders, it was classified as unknown. If, within the 5-minute segment, the child was not exposed to screen media for the full duration, the exact number of minutes and seconds (rounding to the closest 5 seconds) would be recorded. All research staff were trained by a master coder and were required to achieve 90% accuracy before coding independently. Screen media were used as the primary measure of screen time and included the time the child was exposed to any screen-based device, excluding when the child was asleep. The recording day procedure and coding method were consistently applied across all waves of data collection.
Statistical Analysis
Statistical analysis took place from November 1, 2022, to July 31, 2023. Analyses for the present study focused on data collected over 5 waves of the study, when the children were 12, 18, 24, 30, and 36 months of age. These ages were the focus because the exposure, outcome, and all confounders were available for these waves of data collection. To estimate the association between children’s screen exposure and parent-child talk variables at each wave of data collection, linear mixed-effect models were used to account for both the within-person and between-person variability in the repeated measures data, using the mixed command in Stata, version 17 (StataCorp).25 Separate unadjusted and adjusted models were run for each of the parent-child talk outcomes of interest: (1) adult words, (2) child vocalizations, and (3) conversational turns. An interaction between the amount of screen exposure and the wave of data collection was included as a fixed effect, to understand differences across waves. Participant identification was included as a random effect, to account for the variation among participants. In each of the adjusted models, child sex, child’s age in months, mother’s highest level of education, primary caregiver’s self-reported psychological distress, the mean number of home activities, and the number of other children in the home were controlled for. The parameters were computed using the restricted maximum likelihood function, to account for missing data across the study, and the residuals were modeled under the unstructured variance-covariance structure, to account for distinct variances and covariances among the random effects.
Results
The study included 220 families (120 girls [54.6%]; mean [SD] gestational age of children, 39.3 [1.5] weeks; mean [SD] age of mother at childbirth, 31.3 [4.8] years) (Table 1). Approximately half the sample included the first-born child (109 [49.5%]). A total of 133 mothers (60.5%) were categorized into the high education group, and 190 mothers (86.4%) were working until their pregnancy.
Table 1. Sociodemographic Characteristics of the Sample
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| Characteristic | No. (%) (N = 220) |
|---|
| Child | |
| Girls | 120 (54.6) |
| Gestation, mean (SD), wk | 39.3 (1.5) |
| Firstborn | 109 (49.5) |
| Mother | |
| Highest level of completed education is university | 133 (60.5) |
| Age at childbirth, mean (SD), y | 31.3 (4.8) |
| Working until pregnancy | 190 (86.4) |
| No. of home activities with child at 12 mo, mean (SD)a | 2.1 (0.4) |
| Psychological distress score at 12 mo, mean (SD)b | 3.8 (2.9) |
Table 2 shows the distribution of screen time and each parent-child talk measure at each age. When children were 12 months of age, they were exposed to a mean (SD) 87.8 (107.6) minutes (ie, 1 hour, 28 minutes) of screen time, heard a mean (SD) of 14 997.8 (6873.4) adult words, produced a mean (SD) of 1394.7 (522.7) vocalizations, and engaged in a mean (SD) of 369.4 (167.4) conversational turns per day. Screen time, child vocalization, and conversational turn counts increased as children got older, whereas the number of adult words remained relatively stable across time, only increasing slightly as children grew up. By 36 months of age, children were exposed to a mean (SD) of 172.1 (134.7) minutes (ie, 2 hours, 52 minutes) of screen time, heard a mean (SD) of 16 302.6 (6654.7) adult words, produced a mean (SD) of 3306.7 (1612.8) vocalizations, and engaged in a mean (SD) of 734.4 (404.2) conversational turns per day.
Table 2. Descriptive Statistics for Screen Time and Parent-Child Talk Variables at Each Time Point for 220 Familiesa
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| Time point | Mean (SD) value |
|---|
| Screen time, min | Adult words, No. | Child vocalizations, No. | Conversational turns, No. |
|---|
| 12 mo | 87.8 (107.6) | 14 997.8 (6873.4) | 1394.7 (522.7) | 369.4 (167.4) |
| 18 mo | 118.0 (111.2) | 14 987.4 (6884.2) | 2976.4 (803.8) | 541.3 (289.1) |
| 24 mo | 147.2 (123.4) | 15 980.5 (6469.5) | 2771.3 (1214.3) | 709.3 (384.9) |
| 30 mo | 165.9 (123.1) | 15 793.6 (6423.5) | 3405.9 (1558.9) | 750.2 (385.7) |
| 36 mo | 172.1 (134.7) | 16 302.6 (6654.7) | 3306.7 (1612.8) | 734.4 (404.2) |
Results of the unadjusted mixed-effect models indicated an overall negative association between the amount of screen time children were exposed to and the number of adult words children heard at all ages (Table 3). For instance, at 18 months, each additional minute of screen time was associated with children hearing 12.0 (95% CI, −17.4 to −6.5) fewer adult words. For child vocalizations, the association was less clear and appeared to change over time, with an additional minute of screen time associated with a decrease of 1.9 (95% CI, −2.7 to −1.2) vocalizations at 12 months and an increase of 2.2 (95% CI, 1.1-3.4) vocalizations at 30 months. For conversational turns, there was a negative association with screen time, with 1 additional minute of screen time associated with a decrease of 0.6 (95% CI, −0.9 to −0.4) conversational turns at 12 months and a decrease of 0.3 (95% CI, −0.6 to −0.1) conversational turns at 18 months. As the children aged, however, these decreases disappeared.
Table 3. Unadjusted and Adjusted Linear Mixed-Effect Models for the Association Between Parent-Child Talk Variables and the Amount of Screen Time From 12 to 36 Months (N = 220)
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| Measure | Unadjusted model | Adjusted modela |
|---|
| β (95% CI) | P value | β (95% CI) | P value |
|---|
| Adult words |
| Intercept, No. | 16 476.8 (15 664.6 to 17 288.9) | <.001 | 10 165.4 (7057.7 to 13 273.2) | <.001 |
| Screen time at child age | | | | |
| 12 mo | −5.2 (−12.5 to 2.2) | .17 | 5.3 (−2.8 to 13.5) | .20 |
| 18 mo | −12.0 (−17.4 to −6.5) | <.001 | −6.7 (−12.4 to −0.9) | .02 |
| 24 mo | −5.3 (−9.6 to −0.9) | .02 | −3.1 (−7.6 to 1.3) | .17 |
| 30 mo | −5.9 (−10.1 to −1.8) | .01 | −6.1 (−10.5 to −1.6) | .01 |
| 36 mo | −4.7 (−8.9 to −0.6) | .03 | −6.6 (−11.7 to −1.5) | .01 |
| Child vocalizations |
| Intercept, No. | 1777.8 (1686.9 to 1868.8) | <.001 | −240.4 (−644.9 to 164.1) | .24 |
| Screen time at child age | | | | |
| 12 mo | −1.9 (−2.7 to −1.2) | <.001 | −0.4 (−1.1 to 0.4) | .32 |
| 18 mo | −0.6 (−1.3 to 0.2) | .13 | −1.3 (−2.0 to −0.5) | <.001 |
| 24 mo | 0.6 (−0.4 to 1.6) | .22 | −1.9 (−2.8 to −0.9) | <.001 |
| 30 mo | 2.2 (1.1 to 3.4) | <.001 | −1.9 (−3.1 to −0.8) | <.001 |
| 36 mo | 1.5 (0.4 to 2.6) | .01 | −4.9 (−6.1 to −3.7) | <.001 |
| Conversational turns |
| Intercept, No. | 470.7 (441.8 to 449.6) | <.001 | 52.5 (−68.2 to 173.3) | .39 |
| Screen time at child age | | | | |
| 12 mo | −0.6 (−0.9 to −0.4) | <.001 | −0.2 (−0.4 to 0.03) | .10 |
| 18 mo | −0.3 (−0.6 to −0.1) | <.001 | −0.3 (−0.6 to −0.1) | .01 |
| 24 mo | −0.02 (−0.3 to 0.3) | .89 | −0.4 (−0.6 to −0.1) | .01 |
| 30 mo | 0.2 (−0.4 to 0.5) | .10 | −0.6 (−0.9 to −0.3) | <.001 |
| 36 mo | 0.2 (−0.1 to 0.4) | .25 | −1.1 (−1.4 to −0.8) | <.001 |
In the adjusted models, the results show that increases in screen time were associated with decreases in parent-child talk across all variables and ages, with the only exception being screen time at 12 months having no association with the 3 parent-child talk outcomes (Table 3). The largest associations were seen at 36 months, when an additional minute of screen time was associated with a reduction of 6.6 (95% CI, −11.7 to −1.5) adult words, 4.9 (95% CI, −6.1 to −3.7) child vocalizations, and 1.1 (95% CI, −1.4 to −0.8) conversational turns.
Discussion
The present study used data from a prospective cohort study that analyzed longitudinal data on children between 12 and 36 months of age to examine the association between child screen time and 3 measures of parent-child talk (adult words, child vocalizations, and conversational turns). Findings from the mixed-effects models indicated that for every additional minute of screen exposure, parents and children were generally talking or vocalizing less and were engaging in fewer back-and-forth interactions. This association was less clear in the unadjusted models, with no associations evident at some time points in the child vocalizations and conversational turn outcome models. In the adjusted models, which took into account several child and family confounders, a negative association between screen time and parent-child talk became clear, highlighting the important role that maternal educational level, child sex, primary caregiver’s psychological distress, and number of home activities play. Specifically, at 36 months of age in the adjusted models, for 1 extra minute of screen time, children heard 6.6 fewer adult words, made 4.9 fewer vocalizations, and engaged in 1.1 fewer conversational turns. This finding aligns with the concept of technoference and the existing literature, which has suggested that increases in screen time decrease parent-child interactions.17,18,20
For families who follow the current World Health Organization screen time guidelines (eg, 1 hour per day at 36 months of age),26 the present results indicate that children could be missing out on approximately 397 adult words (ie, 6.62 × 60 minutes), 294 vocalizations, and 68 conversational turns every day. According to the present study, as well as international estimates,27 children on average are exceeding these screen time guidelines. Replacing 1 hour (60 minutes) with the mean screen time children were exposed to at 36 months of age in this study (172 minutes), children could be missing out on 1139 adult words, 843 vocalizations, and 194 conversational turns per day. These estimates assume a linear association between screen time and parent-child talk; however, it may also be possible that decreases in parent-child talk occur only after a certain threshold of screen exposure is reached. This should be an important avenue of future research, to help inform updated screen time guidelines.
Having a language-rich home environment is critical to children’s language development,2-5 which promotes school readiness and success throughout the educational system.28,29 This study found a negative association between screen time and parent-child talk, which suggests that screen time is a potential mechanism that could be the basis for an intervention to promote a home environment with more parent-child talk. Implications need to be considered, however, within the reality of current family life. It is unrealistic to assume that all families will simply stop using screens with their young children. Instead, programs and policies could focus on ways to encourage families to use screen time as an opportunity for interaction with their child. The concept of interactive co-viewing has become an increasingly popular strategy for children’s screen time, demonstrating improvements in children’s language outcomes.30 This strategy involves parents interacting with the child during screen time to help facilitate educational benefits. When interactive co-viewing is not possible, age-appropriate, high-quality educational programs could be used that are designed in a way to facilitate the child’s language development.30 Encouraging these approaches within interventions aimed at promoting parent-child interactions and language exposure may alleviate some of the displacement screen time creates on opportunities for parent-child talk. Future research will aim to examine the quality of children’s screen time within the EUiLO data set to inform these approaches, which was out of the scope of the present study.
Strengths and Limitations
This study has some strengths. It is one of few longitudinal investigations into screen time and parent-child talk in the early years of life. It is also unique in that it uses speech recognition technology to measure both screen time and parent-child talk measures. Finally, we have been able to control for a comprehensive set of confounding variables, which few studies have previously done.
Nonetheless, there are limitations that need to be acknowledged. First, this analysis did not include data from when children were 6 months of age. This omission was due to a critical confounder (parent’s self-reported psychological distress) not being measured at this wave of data collection. Given that evidence suggests parents with mental health concerns are less likely to be interacting with their young child31 and more likely to use screen time,32,33 the decision was made to not include that wave in the present analysis. There are also potential limitations within the classification of screen time based on the audio recordings extracted from the LENA software. Given that we were unable to access accompanying video footage, there is a chance that nonscreen-based electronic devices may have been miscoded as screen exposure or that some screen time was missed if there was no accompanying sound. Attempts were made to mitigate this possibility through extensive training of each researcher, and any uncertainty was checked by another researcher. Finally, some families within the study undertook their 30- or 36-month LENA recording day during the COVID-19 pandemic. Although some evidence has suggested the pandemic may have increased families’ screen time,34 in comparison with Australian estimates prior to the pandemic,35 our participants’ mean screen time does not appear to have increased substantially.
Conclusions
Findings from this prospective cohort study suggest that increases in screen time were associated with decreases in adult words, child vocalizations, and back-and-forth interactions for children aged between 18 and 36 months, after controlling for known confounders. Interventions should focus on reducing barriers to a language-rich home environment, with a focus on supports for family’s screen time use. Identifying different ways that screen time could facilitate parent-child interactions, such as through interactive co-viewing, may be important strategies to support families given the current ubiquitous nature of screen time in families’ lives.
Article Information
Accepted for Publication: December 20, 2023.
Published Online: March 4, 2024. doi:10.1001/jamapediatrics.2023.6790
Open Access: This is an open access article distributed under the terms of the CC-BY License. © 2024 Brushe ME et al. JAMA Pediatrics.
Corresponding Author: Mary E. Brushe, PhD, Telethon Kids Institute, University of Western Australia, 108 North Terrace, Ground Floor, Adelaide, SA 5000, Australia (mary.brushe@telethonkids.org.au).
Author Contributions: Dr Brushe had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Concept and design: Brushe, Melhuish, Reilly.
Acquisition, analysis, or interpretation of data: Brushe, Haag, Gregory.
Drafting of the manuscript: Brushe.
Critical review of the manuscript for important intellectual content: Haag, Melhuish, Reilly, Gregory.
Statistical analysis: Brushe, Melhuish, Gregory.
Obtained funding: Brushe, Melhuish, Reilly.
Administrative, technical, or material support: Melhuish.
Supervision: Haag, Melhuish, Reilly, Gregory.
Conflict of Interest Disclosures: Dr Haag reported grants from the National Health and Medical Research Council (NHMRC) during the conduct of the study. No other disclosures were reported.
Funding/Support: This study was supported by an NHMRC Ideas Grant, APP1183515 (Drs Brushe, Melhuish, and Reilly) and an NHMRC Project Grant APP1121830 (Drs Melhuish and Reilly).
Role of the Funder/Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Data Sharing Statement: See the Supplement.
Additional Contributions: We thank the research assistants in the Language in Little Ones (LiLO) study and Electronic Use in Little Ones (EUiLO) study team at Telethon Kids Institute for their work on the recruitment, data collection, and audio coding for the study. We also thank all the service providers who supported the recruitment of families. We are extremely grateful for the ongoing commitment by all the LiLO and EUiLO families to give up their valuable time to support our research.
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