Night terrors are really a dramatic extension of nightmares.

Some students work hard in school to attain high grades.This best illustrates the importance of

A) homeostasis.
B) instinct.
C) safety needs.
D) incentives.

A short-lived but enthusiastically embraced new cultural element,such as tongue piercing and bungee jumping,is formulated by sociologists as a

A) craze.
B) fad.
C) trend.
D) public hysteria.

Which of the following statements is true of long-term memory?

A) It has no known limits.
B) It is not subject to distortion.
C) It is not subject to bias.
D) It is not subject to decay.

Castiel measured the participants' general violent tendencies in an attempt to control for ________.

A) participants' reactivity levels
B) extraneous variables
C) confounding variables
D) response bias

In one massive study of 11,000 twin pairs in four countries,the heritability of general intelligence was found to be greatest during

A) early childhood.
B) middle childhood.
C) adolescence.
D) young adulthood.