According to the composite-stimulus control model (Weiss, 1969, 1972b), an individual discriminative stimulus (S[superscript D]) is composed of that S[superscript D]'s on-state plus the off-states of all other relevant S[superscript D]s. The present experiment investigated the reversibility of composite-stimulus control. Separate groups of rats…

Fifteen autistic and 15 normal Ss were trained to respond to a card containing two visual cues. The children were further tested on the single cues in order to assess whether one or both stimuli had acquired control over their responding. (Editor/RK)

Experiment 1 supported in part by National Institute of Mental Health (NIMH) Research Grant M2232. Experiment 2 submitted as the senior author's PhD dissertation at the University of Miami and supported by NIMH grant MH-14914.

This study examines some variables that may affect two aspects of syntax in Head Start children; the use of descriptors and the use of complete sentences. Thirty-six children were assigned to six experimental conditions in a design which varied adult verbal modeling, feedback, and sex. Children given adult verbal modeling produced significantly…

An experiement was conducted to test the hypothesis that interest inventory items would function as reinforcing stimuli in a visual discrimination task. When previously rated liked and disliked items from the Strong Vocational Interest Blank were differentially presented following one of two responses, subjects learned to respond to the stimulus…