What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

_________________ is the psychologist whose theories are most closely associated with the concept of a "hierarchy of needs."

FIll in the blank with correct word.

In some cultures, such as the Kaluli of Papua New Guinea, adults rarely communicate with young children and never play social games with them, yet their children acquire language within the normal time frame. This suggests that

A) social interactionists' theories about language development are invalid. B) adult molding of communication during the first year is not essential. C) other individuals, such as older peers, mold early communication skills in these cultures. D) gesturing is more important than verbalization.