Prosocial behavior is versatile, multifaceted, and complex. This special section seeks to advance coherent, integrative understanding of prosocial development by addressing this topic through the prism of motivations. This conceptual Introduction presents key ideas that provide a framework for thinking about motivation for prosocial behavior and…

How does empathic physiology unfold as a dynamic process, and which aspect of empathy predicts children's kindness? In response to empathy induction videos, 4- to 6-year-old children (N = 180) showed an average pattern of dynamic respiratory sinus arrhythmia (RSA) change characterized by early RSA suppression, followed by RSA recovery, and modest…

This longitudinal study investigated the relation between mothers' descriptions of mental states portrayed in pictures and 2- to 4-year-old children's theory of mind. Mothers described pictures to children at 3 different times during the year. Findings indicated that mothers' use of mental state utterances at early time points correlated with…