Which of the following factors mentioned in your chapter has been found to contribute to an increase in aggressive behaviors?

In the U.S., the most widely used illegal substance is:

A) cocaine. B) heroin. C) marijuana. D) methamphetamine.

In contrast to comparing mental age to chronological age, most modern tests of intelligence use ____________

a. Stern's formula b. age-group comparison norms c. creativity assessments d. emotional assessments