One of the first neurochemical theories of schizophrenia focused on altered activity of which of the following systems?

The psychological counterpart of the amplitude of the wave is

(a) pitch (b) amplitude (c) timbre (d) cognition

If children show negative effects after their parents' divorce, the effects may result more from having lived with a parent or parents who had problems rather than from the divorce itself. This statement is consistent with which model of divorce?

A) divorce-stress-adjustment model B) sleeper effect model C) selection model D) parentification model