Browsing by Subject "Infant development"
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Item Infants' neural processing of facial attractiveness(2014-12) Jankowitsch, Jessica Michelle; Langlois, Judith H.The relationship between infants’ neural processing of and visual preferences for attractive and unattractive faces was investigated through the integration of event-related potential and preferential looking methods. Six-month-olds viewed color images of female faces previously rated by adults for attractiveness. The faces were presented in contrasting pairs of attractiveness (attractive/unattractive) for 1.5-second durations. The results showed that compared to attractive faces, unattractive faces elicited larger N290 amplitudes at left hemisphere electrode sites (PO9) and smaller P400 amplitudes at electrode sites across both hemispheres (PO9 and PO10). There were no significant differences between infants’ overall looking times based on attractiveness, however, a significant relationship was found between amplitude and trial looking time; larger N290 amplitudes were associated with longer trial looking times. The results suggest that compared to attractive faces, unattractive faces require greater cognitive resources and longer initial attention for visual processing.Item Parental reactions to infants' and toddlers' negative emotions : parenting antecedents and child outcomes(2011-05) Frankel, Leslie Ann, 1984-; Hazen, Nancy Lynn; Jacobvitz, Deborah; Langlois, Judith; Anderson, Edward; Boyd-Soisson, ErinThe present study provides information about the relationships between parental reactions to their children‘s expression of negative emotions at 8 months, parent-infant attachment at 12 and 15 months and parental reactions to children‘s negative emotional expressions at 24 months, and as well as the extent to which all of these variables predict children‘s emotional expressivity as toddlers at 24 months, after controlling for infant emotional reactivity. Analyses showed that parental responses to infant negative emotions, insecure attachment and parental responses to toddlers‘ negative emotions as well as infant emotional reactivity all made independent contributions to predicting toddler negative (vs. positive) affect. Only insecure infant-parent attachment, not parental socialization or infant emotional reactivity, predicted toddler flat (vs. expressive) affect. The inclusion of fathers in this study is important not only to clarify how mothers and fathers differ in socializing their children‘s negative emotions, but also to have a more complete study of how emotional expressivity develops. Analyses conducted separately by parent gender revealed differences in the relationship between parental socialization, attachment and emotional expressivity across mothers and fathers, indicating that researchers should continue to include fathers in studies of socialization of emotional expressivity.Item Synchrony and joint attention development in infancy : a transactional approach(2012-12) Gamber, Bridget Catherine; Neal, A. Rebecca; Woolley, JacquelineJoint attention is an early emerging skill that plays a critical role in early child development (Moore & Dunham, 1995). This shared engagement facilitates language acquisition (e.g., Morales et al., 1998) and predicts social cognition in early childhood (Van Hecke et al., 2007). Thus, it is important to understand factors contributing to individual differences in joint attention development. One potential predictor is mother-infant synchrony, the extent to which mothers’ verbal and nonverbal input is contingent upon their infants’ focus (Siller & Sigman, 2002). Researchers found synchrony to be positively associated with the rate of language development (Akhtar et al., 1991). However, few studies have examined mother-infant synchrony longitudinally and whether synchrony influences individual differences in joint attention. The present study is one of the first to examine these relationships in depth prospectively. Twenty typically-developing infants (11 male) and their mothers participated at approximately 9, 12, and 15 months of age as part of a larger longitudinal study of infants at risk for Autism Spectrum Disorders. Each dyad engaged in a 15-minute unstructured play session, which was coded for synchrony (Siller & Sigman, 2002). In addition, researchers administered the Early Social Communication Scales (ESCS; Mundy et al., 2003) with the infant, which was coded for Initiating Joint Attention (IJA) and Responding to Joint Attention (RJA). The results suggest that synchrony was stable within dyads across 9, 12, and 15 months. Surprisingly, higher 9-month synchrony was correlated with lower 12-month RJA. Growth curve modeling revealed significant growth in RJA, but not IJA, over time. However, synchrony scores did not significantly predict growth in IJA or RJA over time as predicted. These preliminary results suggest that synchrony is a relatively stable construct that likely reflects true differences between mother-infant dyads. Mothers following their child’s lead more often at 9 months had infants exhibiting less RJA at 12 months. Contrary to our predictions, there were no other significant associations between synchrony and joint attention. These findings will be reexamined upon collection of additional data. Nonetheless, the current study helps to elucidate the nature of synchrony and joint attention over time in infancy.