Students enrolled in a senior-level psychology course used a computer-aided personalized system of instruction (CAPSI) to write tests, and give and receive feedback on their writing at a mastery level. Weekly measures of the number of unit tests requested, the number of unit tests cancelled, and informal student feedback all indicate that a change…

Keller's Personalized System of Instruction dominated the literature in the teaching of psychology and behavior analysis in the 1970s and 1980s. After this brief flourish of interest, PSI research trickled off to a nearly imperceptible stream in the 1990s. However, with the increasing availability and ease of use of computers and the internet,…