Abstract

Kazdin (this issue) discussed two types of problems sup-posedly associated with the use of randomization tests for single-subject experiments: the random introduction of treat-ments and the repeated alternation of treatments. Both types of problems represent obstacles to single-subject experimenta-tion, generally, not just to the determination of significance by the randomization test procedure. Ways to reduce the ad-verse effects associated with the random introduction of treat-ments and the repeated alternation of treatments are presented.