Biologists have cataloged many species that determine the allocation of mating opportunities, food, and other resources, both within and between groups, by ____
a. ?cooperation, usually among females
b. ?communication, usually audible
c. ?competition, usually in the form of fighting
d. ?altruistic behavior, usually within the family
ANSWER:
c
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A nonexperimental research design must be used to study which of the following situations?
A. the extent to which changes in a dependent variable are caused by the manipulation of an independent variable B. an analysis of the words used in presidential speeches in times of war at different times in history C. the extent to which political affiliation (Republican, Democrat) is related to differences in one's concern for the economy D. an analysis of fruit intake among children who live in poverty prior to and following an initiative to improve the availability of fruits in impoverished communities
If a researcher runs an ad in a paper in order to recruit subjects, and places the first 10 people who call in one group and the next 10 people who call in another group, what sort of threat to internal validity has been introduced?
a. Mortality b. Experimenter bias c. Selection bias d. Regression effect
The sexual arousal caused by cross-dressing ____
a. is usually harmless b. can cause impairment in daily functioning c. is often the reason transvestites seek therapy d. can result in the tansvestite being called a "peeping tom"
The preschool student called his classmate a "stupid poophead." What type of aggression is this?
A. direct active B. direct passive C. indirect active D. indirect passive