A historian plans a research study on how early twentieth-century school officials and psychologists influenced each other with respect to the advocacy of intelligence testing.
a. What concepts does the historian need to define in doing this research, and why?
b. List one factor that will affect the generalizability of the historian's findings.

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The Answer of A historian plans a research study on how early twentieth-century school officials and psychologists influenced each other with respect to the advocacy of intelligence testing.
a. What concepts does the historian need to define in doing this research, and why?
b. List one factor that will affect the generalizability of the historian's findings.

A Historian Plans a Research Study on How Early Twentieth-Century