Have students report on an article that used three or more levels of a single independent variable


Have students report on an article that used three or more levels of a single independent variable.Classic examples of such experiments include

Rosenzweig, M. R., Bennett, E. L., & Diamond, M. C. (1972). Brain changes in response to experience.

Scientific American, 226, 22-29.

Festinger, L., & Carlsmith, J. M. (1959). Cognitive consequences of forced compliance.

Journal of Abnormal and Social Psychology, 58, 203-210.

Seligman, M. E. P. & Maier, S. F. (1967). Failure to escape traumatic shock. Journal

of Experimental Psychology, 74, 1-9.

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