Ll. Ross et D. Mcbean, A COMPARISON OF PACING CONTINGENCIES IN CLASSES USING A PERSONALIZED SYSTEM OF INSTRUCTION, Journal of applied behavior analysis, 28(1), 1995, pp. 87-88
This study compared the effects of multiple versus single deadline con
tingencies on distribution of unit-mastery test taking by students in
four university classes taught using the personalized system of instru
ction. Rate of test taking was most uniform when multiple deadlines we
re imposed throughout the course. When deadlines were infrequent, a sc
alloped pattern of test caking developed.