Aimee Theyer, Christina Davidson, Ghada Amaireh, Sobanawartiny Wijeakumar
{"title":"Association between caregiver and infant visual neurocognition","authors":"Aimee Theyer, Christina Davidson, Ghada Amaireh, Sobanawartiny Wijeakumar","doi":"10.1016/j.infbeh.2024.101975","DOIUrl":"10.1016/j.infbeh.2024.101975","url":null,"abstract":"<div><p>Previous work has shown that caregiver attention shapes visual cognition in infants through dyadic interactions. Is this association measurable when visual cognition is objectively measured in caregivers and infants using comparable experimental paradigms? In the current study, we presented infants (N = 86) and caregivers (N = 78) with age-specific variants of the same preferential looking visual cognition task to investigate whether caregiver visual cognition was associated with their infants’ visual cognition. In each trial of the task, two side-by-side flashing displays of coloured shapes were presented. On the ‘unchanging’ side, the colours of the shapes remained the same. On the ‘changing’ side, the colour of one shape changed after each flash. Load was varied by changing the number of shapes across trials (low, medium, and high loads). We extracted looking dynamics using video recordings and brain function using functional near-infrared spectroscopy as both infants and caregivers engaged with the task. Change preference (CP) score, which represented the amount of time spent looking at the changing side divided by the total looking duration, showed a load-dependent modulation for both infants and caregivers. Both groups showed the highest CP scores at the low load. Further, higher caregiver CP scores was associated with higher infant CP scores at the low load. Both infants and caregivers engaged canonical regions of the fronto-parietal network involved in visual cognition. Critically, higher caregiver CP scores were associated with greater activation in the left superior parietal lobule in younger infants, a region involved in allocating visuo-spatial attention and working memory maintenance. Further, there was spatial overlap between performance-dependent regions in the right parietal cortex in caregivers and younger infants. Our findings provide first evidence of a heritability-related visual neurocognitive association between caregivers and their children in the first year of life.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0163638324000547/pdfft?md5=e991bbc8f9cc217099ae8cd0ab8e8272&pid=1-s2.0-S0163638324000547-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141581865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sensitivity to temporal synchrony and selective attention in audiovisual speech in infants at elevated likelihood for autism: A preliminary longitudinal study","authors":"Itziar Lozano , Mercedes Belinchón , Ruth Campos","doi":"10.1016/j.infbeh.2024.101973","DOIUrl":"10.1016/j.infbeh.2024.101973","url":null,"abstract":"<div><p>Autism Spectrum Disorder is a highly heritable condition characterized by sociocommunicative difficulties, frequently entailing language atypicalities that extend to infants with a familial history of autism. The developmental mechanisms underlying these difficulties remain unknown. Detecting temporal synchrony between the lip movements and the auditory speech of a talking face and selectively attending to the mouth support typical early language acquisition. This preliminary eye-tracking study investigated whether these two fundamental mechanisms atypically function in infant siblings. We longitudinally tracked the trajectories of infants at elevated and low-likelihood for autism in these two abilities at 4, 8, and 12 months (<em>n</em> = 29). We presented two talking faces (synchronous and asynchronous) while recording infants’ gaze to the talker’s eyes and mouth. We found that infants detected temporal asynchronies in talking faces at 12 months regardless of group. However, compared to their typically developing peers, infants with an elevated likelihood of autism showed reduced attention to the mouth at the end of the first year and no variations in their interest to this area across time. Our findings provide preliminary evidence on a potentially atypical trajectory of reduced mouth-looking in audiovisual speech during the first year in infant siblings, with potential cascading consequences for language development, thus contributing to domain-general accounts of emerging autism.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141473913","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":"Learning phonetic categories in infancy: The role of word-context information","authors":"Chiara Santolin , Camille Frey , Nuria Sebastian-Galles","doi":"10.1016/j.infbeh.2024.101961","DOIUrl":"10.1016/j.infbeh.2024.101961","url":null,"abstract":"<div><p>Identifying the type of mechanisms at the core of phonetic categorization remains a central subject of research in infant language learning. Amongst different theories, one is that infants compute distributional information of phonemes based on their surrounding sounds (i.e., word context) such that phonemes that appear in different word contexts are more likely to be discriminated and categorized separately than phonemes that appear in similar word contexts. Following the procedure of Feldman et al. (2013a), we investigated the role of contextual information in the acquisition of phonetic categories in 8-month-old infants, using a non-native vowel contrast (English /ɒ/-/ʌ/). In Experiment 1, we established lack of discrimination of the non-native contrast without prior exposure to it. In Experiment 2, we manipulated the type of exposure prior to testing: half of the infants were exposed to minimal pair carriers (words that differ by one phoneme only; e.g., <em>lituh</em> and <em>litoh</em>), and the other half of the infants were exposed to non-minimal pair carriers (words formed by different phonemes; e.g., <em>lituh</em> and <em>nutoh</em>). All infants were tested for discrimination of the contrast (<em>tuh</em> vs. <em>toh</em>) presented as alternating (e.g., <em>tuh-toh-tuh-toh</em>) and non-alternating trials (e.g., <em>tuh-tuh-tuh</em>), as in Experiment 1. Infants in both conditions looked on average longer at alternating rather than non-alternating trials, suggesting that they discriminated the /ɒ/-/ʌ/ contrast after a brief exposure to the vowels embedded into words. Crucially, discrimination occurred regardless of whether words were minimal pair carriers or non-minimal pair carriers. A cross-experiment comparison revealed that infants showed different patterns of looking times based on whether they were exposed to the contrast before testing (Experiment 2) or not (Experiment 1). Our study shows that any type of word context helps infants to re-establish discrimination of non-native contrasts once sensitivity has been lost. These findings aid to better understand how the speech input modulates learning mechanisms during the establishment of phonetic categories in the first year of postnatal life.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141452473","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}
Vandhana Choenni , Carlinde W. Broeks , Anne Tharner , Maartje P.C.M. Luijk , Frank C. Verhulst , Mijke P. Lambregtse-van den Berg , Rianne Kok
{"title":"Attachment security and disorganization in infants of mothers with severe psychiatric disorder: Exploring the role of comorbid personality disorder","authors":"Vandhana Choenni , Carlinde W. Broeks , Anne Tharner , Maartje P.C.M. Luijk , Frank C. Verhulst , Mijke P. Lambregtse-van den Berg , Rianne Kok","doi":"10.1016/j.infbeh.2024.101974","DOIUrl":"https://doi.org/10.1016/j.infbeh.2024.101974","url":null,"abstract":"<div><p>The aim of this preliminary study was to explore infant-mother attachment quality in a Dutch clinical sample of mothers with severe psychiatric disorder, with or without comorbid personality disorder. Thirty-two mothers were recruited through specialized secondary and tertiary outpatient clinics and mental health institutions. Maternal psychiatric and personality diagnoses were verified with structured clinical interviews during pregnancy. Maternal concurrent level of psychiatric symptoms was assessed by self-report and infant-mother attachment quality by observation in the Strange Situation Procedure at 14 months postpartum. In the full sample, almost half of the infants were classified as disorganized. All infants of mothers with a comorbid personality disorder were classified as either insecure or disorganized. Infants of mothers with a comorbid personality disorder had a significantly higher disorganization score than infants of mothers with a psychiatric disorder only. Continuous attachment security scores did not differ significantly between groups. In the full sample, continuous infant attachment security and disorganization score were not significantly correlated with the level of maternal concurrent psychiatric symptoms. Our exploratory findings suggest a specific link between maternal psychiatric and comorbid personality disorder and attachment disorganization. Moreover, chronicity of symptoms appears more relevant for attachment behaviors than the severity of concurrent psychiatric symptoms. Maternal personality disorder may have a strong formative impact on infant attachment security and disorganization, which warrants further research to inform clinical practice, in order to reduce the risk of intergenerational transmission of maternal psychopathology.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0163638324000535/pdfft?md5=2fb29358aaa0c66e7d8640c4328ef281&pid=1-s2.0-S0163638324000535-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141422941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maylli Daiani Graciosa , Priscilla Augusta Monteiro Ferronato , Rene Drezner , Edison de Jesus Manoel
{"title":"Emergence of locomotor behaviors: Associations with infant characteristics, developmental status, parental beliefs, and practices in typically developing Brazilian infants aged 5 to 15 months","authors":"Maylli Daiani Graciosa , Priscilla Augusta Monteiro Ferronato , Rene Drezner , Edison de Jesus Manoel","doi":"10.1016/j.infbeh.2024.101965","DOIUrl":"https://doi.org/10.1016/j.infbeh.2024.101965","url":null,"abstract":"<div><p>Independent locomotion provides autonomy for infants, drastically changing their relationship with their surroundings. From a dynamic systems perspective, the interaction between environment, tasks, and organismic constraints leads to the emergence of new behaviors over time. This 6-month longitudinal study aimed to verify associations between the emergence of locomotor behaviors and infants' characteristics, developmental status, parental beliefs, and practices. This observational study remotely assessed 37 full-term Brazilian infants aged 5 to 15 months, divided into two groups (G1: 5 to 11 months, n = 19; and G2: 9 to 15 months, n = 18). The motor developmental status of infants was closely associated with the emergence of behaviors (p < 0.05). Infants in G2 whose parents agreed with the statement \"In typically developing infants, motor development occurs naturally and there is no need to actively stimulate it\" started to walk later than those whose parents disagreed. Infants whose parents expected them to walk around 10–11 months walked earlier compared to those expected to walk after 11 months (G2, p = 0.011). Infants in G2 with a high frequency of staying in the supine position started to walk, both with and without support, later than those with a low frequency (p < 0.05). For infants in G1 with a high frequency of playing on the floor, locomotion (p = 0.041) and crawling on hands-and-knees (p = 0.007) started sooner compared to those with a low frequency. Staying in the cradle more frequently was related to a later emergence of supported walk (p = 0.046) among infants in G2. The emergence of locomotor behaviors is associated with motor developmental status, the surfaces where the infant plays, and body position. Parental beliefs and expectations influence how infants are stimulated and, consequently, the emergence of independent walking.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141313431","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":"Context of digital media use in early childhood: Factors associated with cognitive development up to 36 months of age","authors":"Bruna Gabriella Pedrotti, Denise Ruschel Bandeira, Giana Bitencourt Frizzo","doi":"10.1016/j.infbeh.2024.101963","DOIUrl":"https://doi.org/10.1016/j.infbeh.2024.101963","url":null,"abstract":"<div><p>The influence of digital media on child cognitive development is a complex factor that goes beyond screen time. This study investigates the broader impact of digital media on child cognitive development, considering contextual variables such content type, parental mediation, and maternal mental health. Brazilian mothers (N = 212) of children 4–36 months old answered an online survey. Results showed that children’s screen time increases with age. The model with unmediated use, non-educational content, and mother’s screen time explains 28.7 % of children’s screen time variance. Non-educational content and simultaneous screen media use explained 5.3 % of the variance in toddlers’ cognitive development. Mothers with common mental disorders tended not to mediate their children’s media use. We discuss the influence of caregivers' availability to mediate infants' and toddlers' digital media use and its impact on children's cognitive development. These findings underscore the necessity for educational and awareness campaigns aimed at fostering access to high-quality digital content for children during critical stages of development.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291861","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":"Infant sensorimotor decoupling from 4 to 9 months of age: Individual differences and contingencies with maternal actions","authors":"Zhuojun Ying, Betina Karshaleva, Gedeon Deák","doi":"10.1016/j.infbeh.2024.101957","DOIUrl":"10.1016/j.infbeh.2024.101957","url":null,"abstract":"<div><p>Triadic interactions, wherein infants coordinate attention between caregivers and objects of shared focus, are believed to facilitate infant learning, and emerge around 9–12 months of age (Carpenter et al., 1998). Sensorimotor decoupling, wherein infants look at one percept while manipulating another, or use each hand for different actions, was hypothesized (de Barbaro et al., 2016) to contribute to triadic skills by allowing infants to smoothly shift attention between objects and social partners. We explored the development of Hand-Hand (H-H) and Gaze-Hand (G-H) decoupling in 38 infants at 4, 6, and 9 months. We also tested contingencies between maternal behaviors and infant decoupling: i.e., whether decoupling events followed maternal object-directed actions. Both overall and contingent infant decoupling increased from 4 to 9 months. Decoupling rates (both G-H and H-H) predicted variance in infants' fine and gross motor scores. Contingent G-H decoupling at 6 months predicted BSID-III communication scores at 18 months. Thus the development of infant sensorimotor skills, including decoupling, allows infants to smoothly shift attention and participate in triadic interactions.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0163638324000365/pdfft?md5=9768a90a7403758cd2a3e8b0475cb639&pid=1-s2.0-S0163638324000365-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141186729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hush, little baby: The role of C-tactile afferents in babywearing infants with neonatal opioid withdrawal","authors":"Lela Rankin , Lisa M. Grisham , Catherine Ingbar","doi":"10.1016/j.infbeh.2024.101960","DOIUrl":"10.1016/j.infbeh.2024.101960","url":null,"abstract":"<div><p>Social touch through infant holding, skin-to-skin contact, and infant carrying (babywearing) decreases infant distress and promotes secure attachment. Unknown is the extent to which these effects are the result of the activation of C-Tactile afferents (CTs), the constellation of nerve fibers associated with affective touch, primarily located in the head and trunk of the body. The purpose of the present study was to compare dynamic touch (CTs activated) to static touch (CTs less activated) during a babywearing procedure among infants experiencing Neonatal Opioid Withdrawal Syndrome (NOWS). NOWS is a spectrum of clinical symptoms, including elevated heart rate (HR), associated with withdrawal from intrauterine opioid exposure. We hypothesized that stroking an infant’s head during babywearing would amplify the pleasurable effect of babywearing as measured by changes in infant HR. Twenty-nine infants in a Neonatal Intensive Care Unit (NICU) in the Southwestern USA were worn in an infant carrier starting at five days old (<em>M =</em> 5.4, SD = 2.6; 46.2 % White, 26.9 % Latinx, 11.5 % Native American) and physiological readings were conducted daily; heart rates of infants and caregivers were taken every 15-seconds for 5-minutes, <em>before</em>, <em>during</em>, and <em>after</em> babywearing (30 min per phase). Each day infants alternated (randomly) in a static touch (hands-free babywearing) or dynamic touch condition (stroking the top of the infants’ head at a velocity of 3 cm/s while babywearing). On average, infants completed 3 dynamic and 3 static babywearing sessions. Hospital and research staff participated in babywearing when a parent was not available (31.0 % of infants were exclusively worn by volunteers, 27.6 % were exclusively worn by parents). We analyzed the data using Hierarchical Linear Models due to the 3-level nested design (<em>N</em> = 29 infants, <em>N</em> = 191 readings, <em>N</em> = 11,974 heart rates). Compared to baseline (infant calm/asleep and without contact), infant’s HRs significantly declined during and after babywearing, controlling for pharmacological treatment. These effects were significantly stronger during the dynamic touch condition (reduction in HR of 11.17 bpm) compared to the static touch condition (reduction in HR of 3.74 bpm). These effects did not significantly vary by wearer (mother, father, volunteer). However, differences between the dynamic and static conditions were significantly stronger in earlier babywearing sessions, potentially indicating a learning effect. There was evidence for a calming effect among caregivers as well, particularly in the dynamic touch condition, when caregivers were engaged in active touch. Activation of CTs appears to be an important mechanism in the physiological benefits of babywearing and in the symbiotic role of caregiver-infant attachment.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141184527","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}
Zoe C.G. Cloud , Alicia Spittle , Jeanie Cheong , Lex W. Doyle , Peter J. Anderson , Karli Treyvaud
{"title":"Predicting externalizing behaviors in typically developing toddlers at 24 months: Insights from parenting at 12 months","authors":"Zoe C.G. Cloud , Alicia Spittle , Jeanie Cheong , Lex W. Doyle , Peter J. Anderson , Karli Treyvaud","doi":"10.1016/j.infbeh.2024.101964","DOIUrl":"10.1016/j.infbeh.2024.101964","url":null,"abstract":"<div><p>Early observational assessment of parent and child behaviors may identify risk factors associated with the development of early child externalizing behaviors. This study aimed to examine factors associated with child externalizing behaviors at 24-months of age, including early maternal depression, family social risk and the parent-child relationship. Using a longitudinal design in 89 mother-child dyads (<em>n</em> = 43 female), maternal depressive symptoms and social risk were measured post-birth, and 12-months later parent-child interaction was assessed using the Emotional Availability Scales. To assess child externalizing behaviors, a parent-report questionnaire was administered when children were 24-months old. Increased early maternal depressive symptoms (<em>p</em> = .03), but not higher social risk (<em>p</em> = 0.17), were associated with higher child externalizing behaviors in children at age 24-months. After adjusting for early maternal depressive symptoms and familial social risk, lower levels of observed maternal structuring (β = −2.60, 95 %CI = −4.56, −0.64, <em>p</em> = .01) and lower levels of non-hostility (β = −3.39, 95 %CI −6.64, −0.14, <em>p</em> = .04) when the child was 12-months old were associated with higher parent-report of externalizing behaviors. However, the child’s observed interaction behavior was not associated with the mother’s report of child externalizing behavior. Interventions targeting specific post-natal maternal mental health and early parenting behaviors may reduce the risk for the development of later child externalizing problems.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0163638324000432/pdfft?md5=06bf6ab51ebffb1eb12b75b45ae46602&pid=1-s2.0-S0163638324000432-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141184561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexander LaTourrette , Cynthia Blanco , Naz Deniz Atik , Sandra R. Waxman
{"title":"Navigating accent variability: 24-month-olds recognize known words spoken in an unfamiliar accent but require additional support to learn new words","authors":"Alexander LaTourrette , Cynthia Blanco , Naz Deniz Atik , Sandra R. Waxman","doi":"10.1016/j.infbeh.2024.101962","DOIUrl":"10.1016/j.infbeh.2024.101962","url":null,"abstract":"<div><p>As infants learn their native languages, they must also learn to contend with variability across speakers of those languages. Here, we examine 24-month-olds’ ability to process speech in an unfamiliar accent. We demonstrate that 24-month-olds successfully identify the referents of known words in unfamiliar-accented speech but cannot use known words alone to infer new word meanings. However, when the novel word occurs in a supportive referential context, with the target referent visually available, 24-month-olds successfully learn new word-referent mappings. Thus, 24-month-olds recognize and learn words in unfamiliar accents, but unfamiliar-accented speech may pose challenges for more sophisticated language processing strategies.</p></div>","PeriodicalId":48222,"journal":{"name":"Infant Behavior & Development","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141184559","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}