Under which of the following circumstances would a study of the effectiveness of different forms of psychotherapy have high internal validity?
a. The results are statistically significant.
b. The independent variable is confounded with other factors.
c. The findings can be generalized to other types of patients.
d. Patient improvement can be attributed to the psychotherapy and not to other factors.
Answer: d.
Psychology
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According to Erikson, the last stage of development involves the crisis of:
a. identity vs. role confusion b. generativity vs. stagnation c. autonomy vs. doubt d. ego-integrity vs. despair
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