Article describes a study in stimulus-sampling that now makes it possible for the theory to account for the increased resistance to extinction following partial reinforcement. (Author/ML)

The purpose of this study was to measure nonverbally the preference of alternative responses when the net probability of being rewarded was the same. A demonstration of preference under these circumstances would suggest the ability to control or maintain behavior without explicit administration of a reinforcing agent. Head Start children were used…

The media center could and should be an impressive resource tool in providing information and surrogate experiences for use by the student in forming his tastes, attitudes and values. (Author/NH)

We examined some conditions under which a response acquired as a tact might facilitate the establishment of a mand. We taught 3 participants with developmental disabilities to tact the items ranked highest and lowest in a preference assessment and subsequently tested to see if the responses occurred as mands. All participants manded for the highly…