If a psychologist rating empathic responses to strangers' distress on a scale of 1 to 20 finds that most participants have ratings of either 8 or 16, the distribution of ratings is
A) bimodal.
B) unimodal.
C) rectangular.
D) normal.
Ans: A) bimodal.
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Which biological event directly results in the growth of a penis in a male fetus?
a. Receiving a Y chromosome at conception b. Secretion of testosterone by the testes c. Absence of the release of female hormones d. The presence of a gene on the X chromosome
Which of the following researchers proposed that perceptual speed is a type of intelligence distinct from other types of intelligence?
a. Charles Spearman b. Howard Gardner c. Robert Sternberg d. L.L. Thurstone
The most likely reason for a woman to have a miscarriage is
A) poor prenatal care. B) maternal alcoholism. C) too much exercise. D) serious genetic abnormities in the fetus.
Tolman's rats developed a cognitive map, or mental representation of a spatial layout of a maze they had learned. This map enabled them to locate novel pathways to food rather than simply following the route they had learned. This idea was at odds with strict behaviorists who:
A. remained unable to explain Tolman's results. B. refused to acknowledge mental processes. C. felt the rats had actually learned more than previously believed. D. believed rats had an innate ability to learn everything necessary