Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 2.00 . If the effect size is measured using r2, what is the value of r2?

Kristin wants to go out and play, but her mother has said no. Kristin goes to her room and plays her rock music very loudly. The noise drives her mother crazy and Kristin is allowed to go out and play if she will turn off her music. In this example, ____ was a form of negative reinforcement.

A. playing the music B. turning off the music C. going crazy D. going out to play

Clinical psychologists study __________

a. how people's personalities changes as they grow older b. the relationship between personality traits and mental health c. the personality traits of good workers d. if we can see personality in the structures of the brain

The critical period of development during which exposure to _________ organizes male and female sexual behavior in rats during adulthood is __________.

A. estrogen; just after conception B. androgens; shortly after birth C. estrogen; during the estrous cycle D. androgens; during the estrous cycle

One of the advantages of conducting a longitudinal study is that longitudinal studies can _____________________

A) ?be completed quickly. B) ?help identify developmental trends and patterns. C) ?determine causality. D) ?be completed with relatively few researchers.