In an experiment, a researcher wants to avoid the presence of:
a) extraneous variables.
b) dependent variables.
c) independent variables.
d) random assignment.
ANS: A, The presence of extraneous variables makes the relationship between an independent and dependent variable very difficult to discern.
Psychology
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Many people fail to solve the "pieces of chain" problem or the "six matches" problem discussed in the text because they ______
a. use an incorrect algorithm b. develop conceptual blocks resulting from overly rigid assumptions c. use hill-climbing instead of creating subgoals d. use heuristic methods rather than trial and error
Psychology
Neurotransmitters must pass from an axon terminal to the next dendrite by crossing a fluid-filled space called the
a. synaptic gap. b. reuptake inhibitor. c. neuron. d. glial cell.
Psychology