________ is defined as a method used to assign participants to different research conditions to guarantee that all participants have the same chance of being in any specific group.
A. Sampling
B. Controlling
C. A correlation study
D. Random assignment
Answer: D
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The fact that the nervous system conveys impulses by action potentials instead of electrical conduction causes which of the following? a. Electrical stimulation would have no effect on brain activity. b. You are aware of events in your body slightly after they happen. c. Friends sometimes think the same thought at the same time
d. More of the brain is devoted to vision than to hearing.
Three friends are having a discussion about taxes, but the conversation is soon sidetracked as different statements bring up related ideas. The conversation drifts from taxes, to politicians, to the election, to fund raising. This shift in the focus of the conversation is consistent with Collins and Loftus' theory of
a. prospective memory processes. b. spreading activation within a semantic network. c. schema-based recall of information. d. mood-congruent memory.
Three-month-old infants can remember their kicking actions to a mobile over their head move for as long as
a. 1 hour afterwards. c. 3 days afterwards. b. a day afterwards. d. 8 days afterwards.
The question of whether results of an experiment generalize to other groups, settings, and participants is a question of:
a. external validity. b. ecological validity. c. internal validity. d. experimental control.