The 2 Sigma Problem

Stanford students in a traditional classroom were paired with Hewlett-Packard engineers who received videos of the lectures. The HP engineers viewed the videos then designated one of their number to be the “tutor” for the group. The group then discussed and reviewed the material. The engineers outperformed their traditional classroom-based counterparts.

Gibbons, J., Pannoni, R. and Orlin, J. (1996). “Tutored Video Instruction: A Distance Education Methodology that Improves Training Results.” Paper presented at the American Society of Training and Development International Conference and Exposition, Orlando, Florida, June 3.