Rosie says she doesn't like to be alone, but she tends to play by herself instead of finding her friends, who don't always play nicely. The potential of being upset by unfriendly play has led to Rosie's:

To study change over time, researchers use which three basic research designs?

observation, experiments, survey cross-sectional, longitudinal, cross-sequential biological, social, cognitive significance, odds ratio, factor analysis

What has research shown about the effects of video games on violent behavior?

a. Even brief use of violent video games causes increased violent behavior. b. Playing violent video games more than 30 minutes per day increases violent behavior. c. Playing violent video games has little effect on violent behavior. d. Playing violent video games actually decreases the probability of violent behavior.