Approximately ________ of people with Alzheimer's disease develop psychotic symptoms.
a. 30 to 50%
b. 10 to 30%
c. 50 to 60%
d. 20 to 30%
Answer: a. 30 to 50%
Psychology
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Differential attrition threatens internal validity because
a. the independent variable is biased b. reliability of the measures is lowered c. participants differ between the experimental groups d. pretest sensitization is more likely e. demand characteristics are present
Psychology
A cognitive psychologist mainly studies which aspect of behavior?
a. Motivationc b. Thinking c. Cooperation d. Competition
Psychology