Disputes about the impact of instructional guidance during teaching have been ongoing for more than a half century. On one side of this argument are those who believe that all people--novices and experts alike--learn best when provided with instruction that contains unguided or partly guided segments. On the other side are those who believe that…

This critical examination of the assumption that computer-based instruction enhances student learning and performance over traditional means summarizes arguments from past and present analyses of research, examines media attributes or symbol system theories, and presents evidence that much research is susceptible to rival hypotheses. (MBR)

Computer-based instruction (CBI) studies analyzed by Kulik et al. were examined to explore the validity of competing claims about the computer's contribution to measured achievement gains. Results suggest achievement gains found in CBI studies are overestimated and are due to uncontrolled but robust instructional methods embedded in CBI…