Alexander Turner , Aly Magassouba , Sobanawartiny Wijeakumar
{"title":"Applying a Transformer-based machine-learning model to classify caregiver and infant behaviours during dyadic interactions","authors":"Alexander Turner , Aly Magassouba , Sobanawartiny Wijeakumar","doi":"10.1016/j.infbeh.2025.102175","DOIUrl":"10.1016/j.infbeh.2025.102175","url":null,"abstract":"<div><div>Multimodal caregiver-infant interactions have both concurrent and long-term impacts on child attention, cognitive and social skills. These behaviours are typically manually coded by human researchers, making this approach susceptible to observer bias, dependent on inter-rater reliability, and substantial demands on time and resources. In this study, we aimed to develop a multimodal machine-learning model that could be capable of automatically detecting and classifying multimodal behaviours from video recordings of caregivers and their infants (N = 81; infant mean age = 251.3 ± 34.9 days) engaging with objects. We focused on caregiver scaffolding, caregiver intrusiveness, infant object engagement and infant distractibility. Low-level features from audio, video, and pose data were extracted using specific AI models, and input into a Transformer-based architecture capable of learning temporal patterns across modalities. Our findings revealed a significant contrast in model performance depending on how the data was partitioned. Following previous research, when the dataset was split such that data from all dyads contributed to the training, validation, and test sets - the models achieved notably high classification accuracy of over 98 %. However, when tested on entirely unseen dyads, the performance dropped markedly to around 55 %. These results suggest that the models did not learn behaviors of interest but instead relied on video-specific or dyad-specific details - underscoring key generalizability challenges in applying Transformer-based models to complex, multimodal behavioral data. Nonetheless, this work lays a foundation for future research aimed at refining these models and extending their applicability across diverse caregiving contexts.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"82 ","pages":"Article 102175"},"PeriodicalIF":2.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145776068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Margaret A. Fields-Olivieri, Kristin J. Jennings, Crystal E. Thinzar, Brianna M. Halter
{"title":"Sequential communication patterns reflecting building blocks of conversation: Associations with toddler temperament and mother and father sensitivity","authors":"Margaret A. Fields-Olivieri, Kristin J. Jennings, Crystal E. Thinzar, Brianna M. Halter","doi":"10.1016/j.infbeh.2025.102177","DOIUrl":"10.1016/j.infbeh.2025.102177","url":null,"abstract":"<div><div>Although parent-child conversation is a well-established predictor of subsequent language development, the field lacks understanding of how these conversations emerge and are sustained in everyday life, and of non-sociodemographic factors that account for variability in everyday parent-child conversations. In a sample of 24 one-year-olds (Mean Age = 16.47 months; 95.8 % White, 4.2 % Biracial) and their parents who completed daylong audio recordings, we identified three communication sequences reflecting crucial building blocks of parent-toddler conversation: 1) parental responses to toddler verbal/pre-verbal vocalizations, 2) the effect of parental responses on the toddler’s subsequent communicative behavior (i.e., whether the toddler vocalized again) and 3) parental initiation of conversations. We examined factors accounting for variability in these sequences, including toddler temperament (effortful control and negative affectivity), parental sensitivity, and the interaction between toddler temperament and parental sensitivity. Higher toddler effortful control predicted marginally greater likelihood of maternal responses to toddler vocalizations, marginally greater likelihood that toddlers vocalized following maternal responses, and significantly greater likelihood that fathers initiated conversation with their toddlers. The effects of toddler negative affectivity were largely moderated by parental sensitivity, with higher negative affectivity generally being negatively associated with sequential patterns of parent-toddler conversation engagement, but with higher mother or father sensitivity buffering against or compensating for some of these disruptions. The results highlight the need to disentangle different aspects of parent-toddler conversation to understand factors that account for individual differences in conversation engagement in naturalistic settings.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"82 ","pages":"Article 102177"},"PeriodicalIF":2.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145866076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elizabeth V. Edgar , Kaitlyn Testa , Bethany Ramirez , Ryan A. Cannistraci , James Torrence Todd , Lorraine E. Bahrick
{"title":"Parent Well-Being and Language Input Predict Child Face-Voice Matching and Expressive Language Outcomes","authors":"Elizabeth V. Edgar , Kaitlyn Testa , Bethany Ramirez , Ryan A. Cannistraci , James Torrence Todd , Lorraine E. Bahrick","doi":"10.1016/j.infbeh.2025.102163","DOIUrl":"10.1016/j.infbeh.2025.102163","url":null,"abstract":"<div><div>Parent well-being and quality of language input are well-established predictors of child language. Recently, child intersensory processing of faces and voices was found to predict child language. However, relations between child skills (e.g., intersensory processing) and parent factors (e.g., well-being, language input) remain unclear. This study assessed relations among parent well-being, quality of language input, child intersensory processing, and language in 97 children (51% female; 70% White, 65% Hispanic; 52% mothers with Bachelor’s degree or higher) at 36 months. Greater well-being and quality of language input predicted greater intersensory face-voice matching, which predicted greater expressive (not receptive) vocabulary size at 36 months. This study demonstrates the importance of contributions of parent behaviors to child intersensory face-voice matching skills, and in turn, language.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"82 ","pages":"Article 102163"},"PeriodicalIF":2.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pasquale Rinaldi , Arianna Bello , Silvia Stefanini , Maria Cristina Caselli , Patrizio Pasqualetti
{"title":"The Italian MB-CDI ‘Words and Gestures’ complete and short form: Normative data and validity","authors":"Pasquale Rinaldi , Arianna Bello , Silvia Stefanini , Maria Cristina Caselli , Patrizio Pasqualetti","doi":"10.1016/j.infbeh.2025.102173","DOIUrl":"10.1016/j.infbeh.2025.102173","url":null,"abstract":"<div><div>This study compares normative data of the Italian Words and Gestures complete form (WG CF) and short form (WG SF) of the MacArthur-Bates Communicative Development Inventories (MB-CDI). The samples included 648 children for the WG CF and 583 children for the WG-SF designed for children aged 8–24 months. The concordance between WG SF and WG CF is analyzed in a subgroup of 66 children. Results revealed very close developmental trends as assessed through the two forms, and strong correlations between action/gesture production, word comprehension and word production. The two forms showed high concurrent validity with Intra-Class-Correlation coefficients higher than 0.70, suggesting that the two forms may be used interchangeably in order to describe early communicative and linguistic development in children up to 24 months of age, paying particular attention of saturation of the short form in assessing action-gesture production.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"82 ","pages":"Article 102173"},"PeriodicalIF":2.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145745245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Caregivers’ vocabulary use for children with cochlear implants and children with normal hearing during the first year of post-activation","authors":"Jongmin Jung , Yuanyuan Wang , Tonya Bergeson , Derek Houston","doi":"10.1016/j.infbeh.2025.102176","DOIUrl":"10.1016/j.infbeh.2025.102176","url":null,"abstract":"<div><div>This study compared caregivers' use of content words (common nouns, verbs, adjectives) in speech directed to young children with cochlear implants (CIs) and those with normal hearing (NH). Specifically, we examined potential group differences in caregivers' use of content words during the first year following CI activation. We analyzed free play interactions for three groups of 12 caregiver-child dyads: (1) caregivers of children with CIs (<em>mean</em> age at activation = 13.77 months, <em>SD</em> = 4.31), (2) caregivers of NH children matched by hearing experience to the CI group (NHE), and (3) caregivers of NH children matched by chronological age to the CI group (NCA). Interactions were recorded at 3, 6, and 12 months post-activation (or equivalent). Caregivers' speech was transcribed and coded to measure the number of words (tokens) and unique word forms (types) for each content word class. Linear mixed-effects models showed a marginally significant effect of group on word tokens. A significant difference in word types was found between the CI group and both NH groups. Caregivers of younger NH children used more tokens and types than caregivers of children with CIs. Children with NH experience more word tokens and greater word variety in caregiver speech compared to children with CIs during their first year of robust hearing. This richer input may benefit NH children’s language development, while children with CIs may experience different patterns of exposure to a variety of word types, reflecting their current developmental levels. Further research is needed to explore how caregiver speech affects language outcomes in children with CIs.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"82 ","pages":"Article 102176"},"PeriodicalIF":2.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145835189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigating parental scaffolding and visual experiences in toddlers with autism and high familial likelihood for later autism diagnosis: A head-mounted eye-tracker study","authors":"Elizabeth Perkovich , Sarah Mire , Hanako Yoshida","doi":"10.1016/j.infbeh.2025.102130","DOIUrl":"10.1016/j.infbeh.2025.102130","url":null,"abstract":"<div><div>Parents of autistic children often exhibit distinct interaction styles—such as increased gesturing and sustained focus on their child’s face—compared to parents of neurotypical children, yet the mechanisms driving these behaviors remain unclear. This study examined how parental social scaffolding behaviors influence attention in toddlers at elevated likelihood of autism (i.e., younger siblings of autistic children) and their neurotypical peers. Thirty-eight toddlers (19 per group), matched on age and sex, participated in a semi-naturalistic parent-child play session while wearing head-mounted eye-trackers. Despite no group differences in toddlers’ sustained or joint attention (SA, JA), parents showed distinct interaction patterns: parents of elevated-likelihood toddlers focused more objects, while neurotypical-group parents engaged in more object naming and face-directed attention. Across groups, parental object-looking predicted toddler JA, and object-handling predicted SA. However, the link between object-handling and JA only emerged in neurotypical toddlers, suggesting group-specific differences in how parental cues are integrated. These findings suggest that toddlers at elevated likelihood for autism show comparable attentional behaviors but receive qualitatively different social input. Parents may adjust their scaffolding strategies in response to subtle developmental cues before formal diagnosis. This study highlights the importance of considering developmental context in early social scaffolding and contributes to understanding how parental input shapes attention in diverse populations.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"81 ","pages":"Article 102130"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pınar Doğan , Atiye Karakul , Defne Engür , Mehmet Yekta Öncel
{"title":"The effectiveness of music on pain during heel blood collection in premature infants: A randomized controlled trial","authors":"Pınar Doğan , Atiye Karakul , Defne Engür , Mehmet Yekta Öncel","doi":"10.1016/j.infbeh.2025.102157","DOIUrl":"10.1016/j.infbeh.2025.102157","url":null,"abstract":"<div><div>Newborns are exposed to pain during heel blood collection. The experience of pain in newborns can lead to both physiological and behavioral changes. The aim of this study was examine the effect of music (classical music and lullaby) on pain during the heel blood collection in premature infants. This single blind randomized controlled study was conducted between October, 2022 and April, 2023 in the Neonatal Intensive Care Unit at a university hospital. A total of 60 premature infants were randomly allocated to three groups: the Control Group, the Classical Music Group, and the Lullaby Group. Pain, oxygenation saturation levels, heart rate and respiratory rate were measured before, during, after the heel blood collection procedure. There were no statistically significant differences in the demographic data of the infants in the classical music, lullaby, and control groups. After heel blood collection procedure, pain levels, heart rate and respiratory rate of premature infants in the lullaby groups measurement were lower than the classical and control group. No significant difference was found in terms of oxygen saturation between the groups. In premature infants, in the lullaby group listening to during heel blood collection was more effective in reducing pain compared to the control group and classical music. This indicates lullaby can potentially be an effective method in alleviating pain during heel blood collection.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"81 ","pages":"Article 102157"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145318649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Linda Polka , M. Fernanda Alonso-Arteche , Nicola K. Phillips , Samin Moradi , Lucie Ménard , Matthew Masapollo
{"title":"Infants’ attraction to infant vocalizations – A catalyst for infant development","authors":"Linda Polka , M. Fernanda Alonso-Arteche , Nicola K. Phillips , Samin Moradi , Lucie Ménard , Matthew Masapollo","doi":"10.1016/j.infbeh.2025.102150","DOIUrl":"10.1016/j.infbeh.2025.102150","url":null,"abstract":"<div><div>Infant vocalizations play a key role in infant behavior and development, yet we know very little about how infants perceive speech signals with infant vocal properties. In this perspective paper, we summarize recent developmental studies capitalizing on technical breakthroughs in speech synthesis that have allowed for rigorous exploration of this topic. The findings indicate that infants prefer to listen to speech signals with vocal resonances that specify a small, infant-sized vocal tract; this preference is robust and distinct in some ways from infants’ attraction to infant-directed speech. This <em>infant talker bias</em> may support infants’ speech recognition skills and there is growing evidence that it is also tied to infants’ own emerging vocal production abilities. These findings further validate prominent views of speech development, including the articulatory filter and the analysis-by-synthesis hypotheses. Related work in our lab shows that adults also display a strong attraction to infant vowel sounds, adding weight to calls for an expanded and multimodal infant schema. Converging evidence that both infants and adults find infant vocalizations appealing also provides critical support for the fitness-signaling perspective on infant endogenous vocalization. We argue that the infant talker bias has a positive impact on multiple levels, shaping receptive, expressive, and motivational aspects of infant development. The infant talker bias also plays a central role in caregiving behaviors and infant-directed speech. The perceptual potency of infant speech is a catalyst for infant development and also for meaningful and innovative research.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"81 ","pages":"Article 102150"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neurodevelopmental trajectories of face processing in infants: A review and future directions","authors":"Katherine Meltzoff, Cameron A. Ryczek","doi":"10.1016/j.infbeh.2025.102132","DOIUrl":"10.1016/j.infbeh.2025.102132","url":null,"abstract":"<div><div>Face perception is integral for social development in infancy, and for skills such as joint attention, recognition, and emotion processing. This review synthesizes research findings over the past 25 years related to ERP biomarkers of face perception in infants. We review this literature as it relates to face perception in neurotypical infants and those at risk for, or diagnosed with, autism spectrum disorder (ASD). Future research may be able to utilize these neural signatures of face processing as ‘biomarkers’ to predict which infants are most likely to develop ASD, which is important for early diagnosis and intervention. The N290, P400, and Nc have all been highlighted as ERP components which relate to face processing. We discuss how nuances in these three components respond to face versus non-face stimuli and to emotional facial expressions in neurotypical (NT) infants. Evidence suggests that infants at high risk for ASD and those who go on to develop ASD have measurable differences in brain activity in response to faces compared to those at low risk and who do not go on to have ASD. Although differences in brain activity while viewing faces may not be observed between infants at high risk for ASD and those without at a single time point, longitudinal studies, studies with more varied stimuli, and studies utilizing source localization have uncovered differences. Finally, we present a novel hypothesis about developmental trajectories in both neurotypical children and those with ASD related to both face and non-face processing.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"81 ","pages":"Article 102132"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kelsey Davinson , Amy E. Learmonth , Kimberly Cuevas
{"title":"Infant long-term memory: The last quarter century and the next","authors":"Kelsey Davinson , Amy E. Learmonth , Kimberly Cuevas","doi":"10.1016/j.infbeh.2025.102136","DOIUrl":"10.1016/j.infbeh.2025.102136","url":null,"abstract":"<div><div>Over the last quarter century, research on infant long-term memory has explored the complex, nuanced ways infants remember and how early memories shape interactions with the world. Pioneering investigations in the 1950s and 1960s revolutionized the study of infant cognition and memory. By 2000, foundational properties of infant memory were established via preferential looking, imitation, and operant conditioning paradigms. In the years since, research has advanced understanding of how infants encode, consolidate, and retrieve information across diverse situations. This body of work has revealed that infants possess memory capacities once thought to emerge later in development and that experience shapes both the duration and flexibility of memory. Systematic investigations of reminders have established the necessary and sufficient conditions for retrieval, emphasizing the roles of context, cue, and timing. Advances in behavioral and neuroimaging research, including sleep-based paradigms, have provided insights into memory consolidation during infancy. Recent studies have also broadened the scope of inquiry to include early learning and retention across various media, such as picture books, television, and touchscreens. However, debate continues regarding the nature of infant memory and whether different types of memory follow distinct developmental trajectories. This review outlines future research directions, including how intertwined learning, memory, and attention processes influence one another and are shaped by the dynamic and evolving niches that infants inhabit. Despite major progress, important questions remain unresolved, including the characterization and fate of our earliest memories.</div></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":"81 ","pages":"Article 102136"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145082060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}