In this commentary, I delineate several questions raised by the Hammond and Drummond (2019) paper: (a) to why there seems to be an association between state positive emotion and prosocial behavior in young children, and if and how early positively tinged prosocial behavior provides a pathway to (b) later prosocial behavior more generally…

Arbitrarily applicable derived relational responding has been argued by relational frame theorists to be a form of operant behavior. The present study examined this idea with 4 female participants, ages 4 to 5 years old, who could not perform a series of problem-solving tasks involving arbitrary more than and less than relations. In a combined…

This study aimed to investigate the relationships between abilities to initiate and respond to joint attention and symptoms of autism that have, and have not, been theoretically linked to joint attention. Participants were 51 boys and five girls with autistic disorder, aged between 2 years and 6 years 5 months. Measures of joint attention…

The Battelle Developmental Inventory (BDI) was administered to 121 young children, and parents rated them with the Social Skills Rating System 2-3 years after entry into the study. Correlations between the two measures revealed very weak to modest relationships, providing limited support for the BDI as a predictive measure of future…

This study examined the development of aggressive and oppositional behavior among alcoholic and nonalcoholic families using latent growth modeling. The sample consisted of 226 families assessed at 18, 24, 36, and 48 months of child age. Results indicated that children in families with nonalcoholic parents had the lowest levels of aggressive…