A technique is introduced to study the flow of information through processing stages in choice reaction time tasks. It was designed to determine whether response preparation can begin before stimulus identification is complete ("continuous" models) or if a stimulus must be fully identified prior to any response activation…

Two adults with severe mental retardation were assessed for correct pointing responses to line drawings of required eating utensils. Following tact intervention, mands for two of three utensils emerged. Results suggest transfer from tact variables to the conditioned establishing operation may be facilitated by cultivating a minimal mand…

Describes the establishment of a psychological space for any set of stimuli by determining metric distances between the stimuli with the probability that a response learned for a stimulus will generalize to the other. (Author/TW)

Investigated overextensions in comprehension and production, using the preferential-looking model, in 99 children (ages 1;9 to 2;3) who were asked to find the referent that matched the label they were given in real and anomalous trials. Results confirm that overextensions in production are not diagnostic of children's underlying semantic…

Trained preschoolers and adults on three sets of successive discriminations with stimuli labeled A, B, and R. Tested for derived stimulus-response relations and stimulus-stimulus relations. Adults displayed class-consistent B-R and A-B performances over all conditions. Children's display of class-consistent B-R performance varied by training…