Sam is being administered a test known as the Landolt rings. Which aspect of Sam's vision is being assessed?

According to Piaget, an infant who accidentallysucks her thumb, realizes that she likes it, and

purposely repeats the behavior is demonstrating which substage of sensorimotor development? a. Reflexes b. Primary circular reactions c. Secondary circular reactions d. Coordination of secondary schemes

Children typically choose children who are __________ to be their friends

a. older than they are c. the opposite of themselves b. younger than they are d. like themselves