Most _____ year-olds can hold their balance on one foot for several seconds

The Piagetian sensorimotor stage that involves the infant's responses to objects and people is

stage one. stage two. stage three. stage five.

Sally has a favorite stuffed toy. Sometimes she just looks at it, sometimes she will suck on its ear, and sometimes she will lie on it as if it were a pillow. These behaviors demonstrate the information-processing concept of

allowances. perception. affordances. habituation.