| Popis: |
Humans begin helping others from the first year of their birth. Recent studies have shown that the experience of behavioral matching with others in time and space (i.e., interpersonal synchrony) facilitates infants’ helping behaviors. However, it remains unclear whether and to what extent the rate of helping behavior changes within individuals after experiencing interpersonal synchrony and what temperament traits moderate the effect of interpersonal synchrony on infants’ helping behavior. In this study, we tested 15-month-old infants and conducted helping tasks before and after they experienced interpersonal synchrony or asynchrony. A questionnaire survey was administered to assess temperament traits in each infant. We found that infants’ rapid helping behavior, which occurred within the first 10 seconds from trial onset, marginally increased after experiencing synchronous movement, and they marginally decreased after experiencing asynchronous movement. Moreover, the changes in overall helping rates before and after interpersonal synchrony were associated with infants’ temperament scores for negative affectivity (NEG, one of the factors from the Infant Behavior Questionnaire that represents temperaments such as sadness or fear). These findings demonstrate the importance of considering individual variations in the effects of interpersonal synchrony on an infant’s helping behaviors. |
