Objectives: From a longitudinal perspective, the direction of the relationship between cognitive functioning and well-being in old age, both conceptually and empirically, is still under debate. Therefore, we aimed to disentangle the different longitudinal relationship patterns proposed and whether those differed between young-old and old-old…

Cognitive flexibility is a sophisticated form of executive functions that predicts a range of adaptive outcomes; however, little is known about which caregiving behaviors predict the rapid improvements in children's cognitive flexibility during early childhood. This study examined whether ordinary variations in mothers' provision of emotional and…

Most of the individual difference variance in the population is found "within" families, yet studying the processes causing this variation is difficult due to confounds between genetic and nongenetic influences. Quasi-experiments can be used to test hypotheses regarding environment exposure (e.g., timing, duration) while controlling for…

Moderate, yet relatively consistent, associations between cognitive performance and shyness have been reported throughout the child and adult literatures. The current study assessed longitudinal associations between cognition (i.e., executive functioning) and parent-report temperamental shyness from infancy to early childhood and used temporal…