In childhood, boys are at __________ risk of developing problems of depression compared to girls.

Research on styles of early language learning suggests that referential-style children often

A) have parents who use verbal routines designed to support social relationships. B) have highly sociable personalities. C) have an especially active interest in exploring objects. D) spend a lot of time watching people.

When a t test is applied to experimental research data, the groups are

being compared with regard to their performances on the a. independent variable b. dependent variable c. confounding variable d. controlled variable