In a nonequivalent control-group design, if the experimental and control groups are equivalent at pretest and the experimental group shows a large change while the control group does NOT change from pretest to posttest, you might conclude that
A) there is an effect of the independent variable.
B) there is an effect of the dependent variable.
C) the changes are due to selection.
D) Both A and C
Answer: A
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What brilliant diplomatic coup did Hitler achieve after his full conquest of Czechoslovakia?
a. He signed a nonaggression pact with Britain in exchange for a promise not to invade Poland. b. He signed a treaty with Stalin that included plans for a partition of Poland. c. He agreed with Britain only to annex those parts of Poland that were German speaking. d. He returned the area of Alsace-Lorraine to France as a show of good faith. e. He convinced the Japanese to attack British colonies in East Asia to distract the British from continental troubles.
The problem of overrepresentation is least likely to occur when a country has a _____
a. presidential system b. divided government c. high voter turnout rate d. system of proportional representation
If an experimenter is much older than a participant, that participants might act differently than with a young researcher. This is an example of
a. a psychosocial reaction. b. evaluation apprehension. c. mundane realism. d. biosocial effects.
In a(n) __________, the central government has all the power and can change its constituent units or tell them what to do
a. confederation b. federal system c. totalitarian d. unitary system