A researcher is interested in testing the proposition that watching a lot of television causes increased
aggressiveness among children at school. This can be tested by conducting an experiment in which the independent variable is
A) watching a lot of television.
B) being in school.
C) aggressiveness.
D) age.
Answer: A
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When looking at the wall-mount telephone straight on, a rectangular image forms on Kirby's retinas; looking at the same phone at an angle from the side, a trapezoidal shape forms in each eye. Yet the phone retains the same appearance despite the changing images. This is best explained by
a. size constancy. c. shape constancy. b. lateral vision. d. illusory contours.
A psychiatric diagnosis is valid to the extent that it
a. informs us about the etiology of the disorder. b. helps us predict the course of the disorder/prognosis. c. helps us choose an appropriate treatment for the disorder. d. All of the above suggest diagnostic validity.