Although the trait of Agreeableness is broadly considered a key facet of adjustment, mental health, and socioemotional competence, surprisingly little is known about its developmental origins. Laursen and Richmond (2014) proposed that children's early difficulty poses a challenge for their future social relationships, ultimately leading to low…

We tested empirically a theoretical model of early origins of conscientiousness proposed by Eisenberg, Duckworth, Spinrad, and Valiente (2014). The model posited a developmental interplay between children's early effortful control (EC) and internalized or committed compliance with parents as leading to future conscientiousness. We followed a…

Effortful control (EC), the capacity to deliberately suppress a dominant response and perform a subdominant response, rapidly developing in toddler and preschool age, has been shown to be a robust predictor of children's adjustment. Not settled, however, is whether a view of EC as a heterogeneous rather than unidimensional construct may offer…