Perils of Experimental Research: Without theories, the hypotheses being tested
tend to be ad hoc, possibly illogical, and meaningless;
measurement instruments used in experimental research are not tested for reliability and validity and are incomparable across studies;
much experimental research use inappropriate research designs,
such as irrelevant dependent variables, no interaction effects, no experimental controls, and nonequivalent stimulus across treatment groups.
Findings from such studies tend to lack internal
validity and are highly suspect;
treatments used in research may be diverse, incomparable, inconsistent across studies, and inappropriate for subject populations.
