By 10 months of age, Alan has a vocabulary of a dozen words.  B.F. Skinner would have attributed Alan’s rapid speech development mainly to his:

A baby searches the faces of her parents to see how to respond in unfamiliar situations.  This is called:

Hugh enjoys playing with your keys.  When you take them away and place them in your pocket, Hugh does not search for them.  Piaget would say that Hugh does not understand:

By 10 months of age, Alan has a vocabulary of a dozen words.  B.F. Skinner would have attributed Alan’s rapid speech development mainly to his:

Unusual swelling of a toddler’s face and abdomen and thin, colorless hair are symptoms of:

The sense that is the least developed at birth is:

Basically, the Strange Situation measures how a child:

Basically, the Strange Situation measures how a child:

On average, children begin saying recognizable words at about:

During the sensorimotor stage, the main task is to: