If 15 participants take a pretest and a posttest and have a mean difference score of 1.5, and if the standard deviation of the comparison distribution is 0.5, the t score is
A) 0.5 / 1.5 = 0.33
B) 1.5 / 15 = 0.10
C) 1.5 / 0.5 = 3
D) 1.5 / 0.52 = 6
C
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A research method used photographs of people exhibiting different facial expressions and required participants to label the emotion demonstrated in each photograph. What did this procedure reveal?
a. Western cultures have unique facial expressions. b. The photograph technique was useless. c. Groups tested from all over the world agreed on the emotion exhibited by facial expression. d. Even groups within a single culture failed to identify facial expressions consistently.
What is the main function of the reticular activating system?
A) To control thinking B) To regulate emotions C) To control levels of arousal D) To coordinate involuntary rapid fine-motor movements
Adolescents begin to think differently about themselves because
A) they are having high levels of conflict with parents. B) others are reacting to them in ways to which they are unaccustomed. C) they are experiencing bullying in middle schools. D) they are becoming more depressed.
According to the text, technologically-driven changes in work are likely to
a. allow an increasing proportion of work to be done at home. b. allow less flexibility in the workplace for both men and women. c. increase women's second shift because of longer hours at their job. d. allow men to be the primary caretaker of young children.