Adam and Philip occasionally wrestle, roll, hit, and run after one another, alternating roles while smiling and laughing. Adam and Philip are engaged in __________ play.

In Piaget’s theory, during __________, toddlers use their current schemes to interpret the external world.

_______ of U.S. children suffer from food insecurity. 

__________ parenting predicts the poorest grades and worsening school performance over time.

In a highly plastic cerebral cortex,

Evan covers his eyes when the Wicked Witch of the West appears on the screen while he is watching The Wizard of Oz. Evan is using

Ahmed, age 2, gives his favorite stuffed toy to his little brother when his brother falls down and starts to cry. Ahmed is displaying

In cultures where parent–child cosleeping is widespread,

Two-year-old Greta pretends to bake a cake. Greta is demonstrating

According to Rothbart, individuals differ not just in their reactivity on each dimension but also in