Greitemeyer and his colleagues have conducted a number of studies to examine the effects of video games on helping. They have some participants play a prosocial video game and others play a neutral video game
The independent variable of this research is the
a. degree of helping.
b. type of video game.
c. participants.
d. temperature of the room where they play the game.
Answer: B
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The __________ refers to a theory that a gap between the maturation of the brain's reward circuit and the executive control network leads to a high rate of risk-taking.
A. prefrontal cortex model of risk-taking B. circadian timing system C. ventral striatum D. dual systems model of risk-taking
Which of the following is an aspect of a study that can increase power?
a. Greater differences produced by the independent variable b. Smaller variability of raw scores in each condition c. Increased sample size d. All of the above
A normal distribution has a mean of ยต = 60 with ? = 8 . If one score is randomly selected from this distribution, what is the probability that the score will be greater than X = 54?
a. 0.7734 c. 0.2734 b. 0.2266 d. 0.3085
Over the past 100 years or so, people in industrialized societies have been maturing earlier, as well as growing heavier and taller than in the past. This phenomenon is referred to as the
a. dynamic systems approach. b. rhythmic stereotype. c. cephalocaudal principle. d. secular trend.