The first true longitudinal study of the effects of giftedness on social success was conducted by __________.
A. Wechsler
B. Terman
C. Binet
D. Merill
Answer: B
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When Tukey's HSD test is used, two means are significantly different if the absolute difference between them is
a. equal to the HSD. b. greater than the HSD. c. zero. d. less than the HSD.
Phillipe, a researcher, examined the effect of lighting on learning. Randomly selected participants were asked to learn the same chapter using either a 100-watt or a 125-watt bulb. He found no difference between the learning capacities of the two groups. The nonsignificant results may have occurred because of
A. selection differences. B. insufficient strength of the manipulation. C. a costly measure of learning. D. the use of staged manipulations.
Faye, age 17, has no appetite, no energy, and no interest in any of the activities that used to give her pleasure. In addition, she feels worthless and has problems concentrating and making any decisions. Faye has had these symptoms for a month. Faye is probably suffering from
A. normal adolescent mood swings. B. a major depressive disorder. C. bipolar disorder. D. dysphoric disorder.
Professor Nichols carries out a correlational study where he finds a strong, positive relationship between levels of anxiety and blood pressure
Understanding correlational relationships, he notes that if one tries to infer causation in such a situation, it might be the case that having high anxiety causes one to have high blood pressure, or having high blood pressure causes one to be anxious. This problem with correlational outcomes is known as a. the Hawthorne effect. b. directionality. c. a history effect. d. spontaneous recovery.