Babies, birthdays, and ballgame scores are commonly communicated through:

A major problem with genetic explanations of racial differences in IQ is that ________

a. although intelligence differs between groups, it does not differ within groups. b. heritability estimates used in supporting genetic explanations of group differences are based mainly on white samples. c. the studies typically use black and white children from highly similar socioeconomic groups. d. the explanations are based on linkage studies.

Imagine that you are watching a slide presentation. When the words "borderline," "antisocial," "histrionic," and "narcissistic" appear on the screen, the lecturer apologizes for the missing category label

You know, however, that these types refer to ________ disorders. a. anxiety b. personality c. depressive d. dissociative