The Verification of Independent Variables in Teaching Methods Research

The concept of control in scientific research has long included checks on the experimental, or independent, variable see if it is adhering to its stated or intended specifications (Boring, 1969, p. 3). At least three reasons for the importance of such verification have been recognized by educational researchers. First, as Wispe (1953) commented in regard to teaching methods research, researchers are not justified in analyzing findings and drawing conclusions about the effects of in-