Statistically, haloperidol was significantly superior to placebo in reducing behavioral symptoms. In a discrimination learning paradigm, autistic children receiving haloperidol learned the discrimination while those on placebo did not. Discrimination attained on haloperidol was retained when the children were switched to placebo. (Author)

In experiment one, the experimenter delivered frequent or infrequent social reinforcement that was either contingent or noncontingent. In experiment two, seating arrangements were varied so that information concerning the direction of reinforcement was made ambiguous. (RH)

Time perception is important for many aspects of human behavior, and a large literature documents that adults represent intervals and that their ability to discriminate temporal intervals is ratio dependent. Here we replicate a recent study by vanMarle and Wynn (2006 ) that used the visual habituation paradigm and demonstrated that temporal…

Twenty-four younger (18-35 years) and 24 older adult participants (65 or older) were exposed to three experimental conditions involving the memorization words and their associated contextual features, with contextual feature complexity increasing from Conditions 1 to 3. In Condition 1, words presented varied only on one binary feature (color,…

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)

A critical examination of two key aspects of Piaget's account of how small children come to understand basic number concepts. (Author/CS)

Research supported by U.S. Office of Education contract OE-6-8934.

Research was conducted on two selective attention systems in learning situations. The theoretical and experimental approaches are presented in a set of six papers. One paper considered directions in attention theory and five papers report experiments with pigeon and children subjects. The two attention systems are (1) coding response, which…