Sigmund Freud divided human development into ____ stages

Hostile aggression differs from instrumental aggression in that instrumental aggression

A) is more destructive than hostile aggression. B) involves inflicting pain as a means to an end. C) is more likely to result in retaliation. D) often follows from anger or frustration. E) usually involves inflicting only psychological pain, and not physical pain.

As with all other dimensions of brain development, myelination of the brain is complete by the end of childhood.

a. true b. false