The Learning and Cost Effectiveness of AVT Supplemented Instruction: Specification of Learning Models

This article should be a valuable follow-up of the debate on research techniques which appeared in the fall issue of this journal. Becker and Salemi report on an evaluation of an audiovisual tutorial package used in several two-year colleges, finding that the AVT experience had no differential effect on learning for the experimental group as a whole. Then they go on to discuss some basic research problems, such as simultaneous equation bias, the use of the gap-closing model, and measuring the opportunity cost of student time. Appropriate remedies for these problems are offered, and these should be of considerable interest to others planning evaluation studies in economic education.