Stereotypic behavior exhibited by a third grade boy with autism was maintained by automatic reinforcement and occurrences of stereotypy were brought under stimulus control. The intervention consisted of pairing a green discriminative stimulus card (SD) with free access to stereotypy and a red card (SD absent) with vocal redirection and blocking…

This article is based upon a dissertation submitted to the University of New Mexico in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (MH)

This experiment evaluated the contributions of frequency and contingency of reinforcement to the deprivation-satiation phenomenon. The findings indicated that the perceived contingency of reinforcement is a more powerful determinant of its subsequent reinforcement effectiveness than is its frequency. (JMB)

The relative effectiveness of positive and negative adult preference statements in controlling children's behavior was studied. Results indicated that the adult's antecedent negative comments exerted greater control over the children than did the positive comments. (ST)

Punishment, and high and low value reinforcement were compared for effects on discrimination learning in elementary school boys. (DP)

A report on research which investigates the effectiveness of a reinforcement program which would require an increased amount of desirable behavior for each unit of reinforcement. (Author)

Reports three experiments conducted to investigate factors controlling performance of nonreinforced verbal imitation. (WY)

Six- to 7-month-old infants were tested on their ability to discriminate among three speech sounds which differed on the basis of formant-transition duration, a major cue to distinctions among stop, semivowel, and diphthong classes. (Author/PHR)

The information load analysis of a discrimination-learning situation was studied by comparing speed of learning with a conventional reinforcement procedure and an inseparable reinforcer. Results showed more rapid learning by 4- to 6-year-olds with the inseparable reinforcer on earlier problems in a series and greater effect on more difficult…

Two experiments examined conditions under which complex discriminative behaviors could be established and maintained by reinforcement given concurrently for performance at related tasks. Results indicated that durable stimulus control of oddity responding could be obtained for two cue dimensions for which oddity responding was never reinforced.…

One of the most robust and reliable learning phenomena documented in the animal learning literature is the enhancement of discriminative performance by differential outcomes. To date, very few studies have focused on this effect in humans. The results obtained in these studies support the potential use of the differential outcomes procedure in…

Investigated the possibility that evidence of frequency discrimination might be found when the experimental procedures involved the conjugate reinforcement of nonnutritive sucking. (SDH)