Sigmund Freud's psychoanalytic theory was based primarily on descriptive data from a few case studies. Critics question how well the experiences of these unusual individuals represent others. The concern referred to is that this type of research may lack ________ .

Sigmund Freud's psychoanalytic theory was based primarily on descriptive data from a few case studies. Critics question how well the experiences of these unusual individuals represent others. The concern referred to is that this type of research may lack ________ .




a. standardization
b. reactivity
c. random assignment
d. external validity


Answer: D. External Validity


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