Evaluation of Educational Media: Some Issues

This article provides a systematic presentation of the implicit biases of six studies that evaluate the uses, costs, and effectiveness of educational media. The first is called “benefit of the doubt” which tends to accept and utilize very deficient data when they favor the instructional technology over traditional alternatives. The second bias is reflected in the narrowing of the scope of the analysis to those items on the agenda of the sponsoring agency while ignoring other effects.