Characterization of children's verbal input in a forager ‐farmer population using long‐form audio recordings and diverse input definitions
We report on an ecologically-valid analysis of speech experienced over the course of a day by young children (N = 24, 6–58 months old, 33% female) in a forager-horticulturalist population of lowland Bolivia. A permissive definition of input (i.e., including overlapping, background, and non-linguistic vocalizations) leads to massive changes in terms of input quantity, including a quadrupling of the estim ate for overall input compared to a restrictive definition (only near and clear speech), while who talked to and around a focal child is relatively stable across input definitions. We discuss implications of these resu...
Source: Infancy - November 29, 2023 Category: Child Development Authors: Camila Scaff,
Marisa Casillas,
Jonathan Stieglitz,
Alejandrina Cristia Tags: RESEARCH ARTICLE Source Type: research
Older infants' social learning behavior under uncertainty is modulated by the interaction of face and speech processing
AbstractThe origin of face or language influences infants' perceptual processing and social learning behavior. However, it remains unclear how infants' social learning behavior is affected when both information are provided simultaneously. Hence, the current study investigated whether and how infants' social learning in terms of gaze following is influenced by face race and language origin of an interaction partner in an uncertain situation. Our sample consisted of 91 Caucasian infants from German speaking families. They were divided into 2 age groups: Younger infants were 5- to 8-month-old (n = 46) and the older infants...
Source: Infancy - November 18, 2023 Category: Child Development Authors: Julia Dillmann,
Judith Evertz,
Anna Krasotkina,
Olivier Clerc,
Olivier Pascalis,
Gudrun Schwarzer Tags: RESEARCH ARTICLE Source Type: research
Look before you reach: Fixation ‐reach latencies predict reaching kinematics in toddlers
AbstractResearch on infant and toddler reaching has shown evidence for motor planning after the initiation of the reaching action. However, the reach action sequence does not begin after the initiation of a reach but rather includes the initial visual fixations onto the target object occurring before the reach. We developed a paradigm that synchronizes head-mounted eye-tracking and motion capture to determine whether the latency between the first visual fixation on a target object and the first reaching movement toward the object predicts subsequent reaching behavior in toddlers. In a corpus of over one hundred reach seque...
Source: Infancy - November 12, 2023 Category: Child Development Authors: Drew H. Abney,
Christian M. Jerry,
Linda B. Smith,
Chen Yu Tags: RESEARCH ARTICLE Source Type: research
Newborns' perception of approach and withdrawal from biological movement: A closeness story
AbstractSince birth, infants discriminate the biological motion (BM) revealed by point-light displays (PLDs). To date, no studies have explored whether newborns differentiate BM that approaches rather than withdraws from them. Yet, approach and withdrawal are two fundamental motivations in the socio-emotional world, key to developing empathy and prosocial behavior. Through a looking-behavior paradigm, we demonstrated that a few hours after birth, a human figure approaching attracted more visual attention than a human figure receding, showing that newborns are attuned to PLDs of others moving toward rather than walking away...
Source: Infancy - October 24, 2023 Category: Child Development Authors: Elisa Roberti,
Margaret Addabbo,
Lorenzo Colombo,
Matteo Porro,
Chiara Turati Tags: BRIEF REPORT Source Type: research
Validation of an open source, remote web ‐based eye‐tracking method (WebGazer) for research in early childhood
We report a multi-lab study that compared these two measures in an anticipatory looking task with toddlers using WebGazer.js and jsPsych. Results of our remotely tested sample of 18-27-month-old toddlers (N = 125) revealed that web-based eye-tracking successfully captured goal-based action predictions, although the proportion of the goal-directed anticipatory looking was lower compared to the in-lab sample (N = 70). As expected, attrition rate was substantially higher in the web-based (42%) than the in-lab sample (10%). Excluding trials based on visual inspection of the match of time-locked gaze coordinates and the par...
Source: Infancy - October 19, 2023 Category: Child Development Authors: Adrian Steffan,
Lucie Zimmer,
Natalia Arias ‐Trejo,
Manuel Bohn,
Rodrigo Dal Ben,
Marco A. Flores‐Coronado,
Laura Franchin,
Isa Garbisch,
Charlotte Grosse Wiesmann,
J. Kiley Hamlin,
Naomi Havron,
Jessica F. Hay,
Tone K. Hermansen,
Kriszti Tags: RESEARCH ARTICLE Source Type: research
The impact of a music enrichment program during infancy and early toddlerhood on effortful control at age 3: A preliminary investigation
This study provides initial evidence that early participation in a music enrichment program may benefit later development of EC. This study is registered atClinicalTrials.gov (NCT02936284). (Source: Infancy)
Source: Infancy - October 13, 2023 Category: Child Development Authors: Amy R. Smith,
Casey M. McGregor,
Katelyn Carr,
Leonard H. Epstein,
Catherine Serwatka,
Rocco Paluch,
Jacqueline Piazza,
Shannon Shisler,
Kai Ling Kong Tags: BRIEF REPORT Source Type: research
Issue Information
No abstract is available for this article. (Source: Infancy)
Source: Infancy - October 12, 2023 Category: Child Development Tags: ISSUE INFORMATION Source Type: research
Double it up: Vocabulary size comparisons between UK bilingual and monolingual toddlers
AbstractWe compared vocabulary sizes in comprehension and production between bilingual toddlers growing up in the United Kingdom (UK) and age-matched UK English monolinguals (12 –36 months old) using parent-report vocabulary questionnaires. We found that bilingual toddlers' vocabulary sizes in English were smaller than the vocabulary sizes of their monolingual peers. Notably, this vocabulary gap was not found when groups were compared on conceptual vocabulary in comprehe nsion. Conceptual scoring also reduced the vocabulary gap in production but group differences were still significant. Bilingual toddlers knew more word...
Source: Infancy - October 5, 2023 Category: Child Development Authors: Serene Siow,
Nicola A. Gillen,
Irina Lep ădatu,
Kim Plunkett Tags: RESEARCH ARTICLE Source Type: research
Correlates of infant pointing frequency in the first year
This study examines the emergence of concurrent correlates of infant pointing frequency with the aim of contributing to its ontogenetic theories. We measured monthly from 8 to 12 months infants' (N = 56) index-finger pointing frequency along with several candidate correlates: (1) family socioeconomic status (SES), (2) mothers' pointing production, and (3) infants' point following to targets in front of and behind them. Results revealed that (1) infants increased their pointing frequency acr oss age, but high-SES infants had a steeper increase, and a higher pointing frequency than low-SES infants from 10 months onward,...
Source: Infancy - September 26, 2023 Category: Child Development Authors: Ebru Ger,
Aylin C. K üntay,
Sura Ertaş,
Sümeyye Koşkulu‐Sancar,
Ulf Liszkowski Tags: RESEARCH ARTICLE Source Type: research
Positive coparenting previous to the COVID ‐19 pandemic can buffer regulatory problems in infants facing the COVID‐19 pandemic
This study aimed to analyze the association between positive and negative coparenting previous to the COVID-19 pandemic and infant regulatory capacity in the presence of the COVID-19 pandemic, an adverse condition. A sample of 71 first-born infants and their mothers and fathers from a longitudinal cohort in Portugal were assessed at 2 weeks postpartum before the COVID-19 pandemic and again at 6 months postpartum, before (n = 35) or during the COVID-19 pandemic (n = 36). Parents completed measures of positive and negative coparenting and infant regulatory capacity in both assessment waves. Results revealed that the p...
Source: Infancy - September 25, 2023 Category: Child Development Authors: Tiago Miguel Pinto,
B árbara Figueiredo Tags: RESEARCH ARTICLE Source Type: research
Evidence of tactile arm stepping in newborns and its responsiveness to optic flows specifying self ‐translation
AbstractAlthough the arms participate in many forms of human locomotion, we know very little about when arm movements emerge during locomotor development. Here we investigated whether newborns would make tactile arm stepping movements when we supported them almost horizontally so their hands touched a surface and blocked their leg movements. Building off prior work showing that newborns make more crawling and air stepping leg movements when exposed to optic flows specifying forward and backward self-translation, we also examined whether newborns would make more tactile arm steps when exposed to forward and backward optic f...
Source: Infancy - September 21, 2023 Category: Child Development Authors: Marianne Barbu ‐Roth,
David I. Anderson Tags: RESEARCH ARTICLE Source Type: research
Relation of infants' and mothers' pointing to infants' vocabulary measured directly and with parental reports
AbstractInfants' and parents' pointing gestures predict infants' concurrent and prospective language development. Most studies have measured vocabulary size using parental reports. However, parents tend to underestimate or overestimate infants' vocabulary necessitating the use of direct measures alongside parent reports. The present study examined whether mothers' index-finger pointing, and infants' whole-hand and index-finger pointing at 14 months associate with infants' receptive and expressive vocabulary based on parental reports and directly measured lexical processing efficiency (LPE) concurrently at 14 months and ...
Source: Infancy - September 2, 2023 Category: Child Development Authors: Sura Erta ş,
Sümeyye Koşkulu‐Sancar,
Ebru Ger,
Ulf Liszkowski,
Aylin C. Küntay Tags: RESEARCH ARTICLE Source Type: research
Early social referencing predicts object mastery motivation in infancy: Social antecedents of object mastery motivation
AbstractThe researchers sought to understand the typical development of social referencing and object mastery motivation in infancy and to determine the relationship between social referencing and object mastery behaviors in infants from 7 to 22 months of age. The study included 36 infants who were followed as part of a longitudinal study of at-risk infants but were not determined to need care in the neonatal intesive care unit at birth. Both mastery behaviors of persistence and success showed a statistically significant effect of age, wh ile social behaviors remained stable from 7 to 22 months. Social behaviors at 7 an...
Source: Infancy - August 8, 2023 Category: Child Development Authors: Amelia Yanchik,
Judith M. Gardner,
Bernard Z. Karmel,
Peter Vietze Tags: RESEARCH ARTICLE Source Type: research
Issue Information
No abstract is available for this article. (Source: Infancy)
Source: Infancy - August 1, 2023 Category: Child Development Tags: ISSUE INFORMATION Source Type: research
Automated measurement of infant and mother Duchenne facial expressions in the Face ‐to‐Face/Still‐Face
AbstractAlthough still-face effects are well-studied, little is known about the degree to which the Face-to-Face/Still-Face (FFSF) is associated with the production of intense affective displays. Duchenne smiling expresses more intense positive affect than non-Duchenne smiling, while Duchenne cry-faces express more intense negative affect than non-Duchenne cry-faces. Forty 4-month-old infants and their mothers completed the FFSF, and key affect-indexing facial Action Units (AUs) were coded by expert Facial Action Coding System coders for the first 30 s of each FFSF episode. Computer vision software, automated facial affe...
Source: Infancy - July 20, 2023 Category: Child Development Authors: Yeojin Amy Ahn,
Itir Önal Ertuğrul,
Sy‐Miin Chow,
Jeffrey F. Cohn,
Daniel S. Messinger Tags: RESEARCH ARTICLE Source Type: research
