In the present study we extended errorless learning to a conditional temporal discrimination. Pigeons' responses to a left-red key after a 2-s sample and to a right-green key after a 10-s sample were reinforced. There were two groups: One learned the discrimination through trial and error and the other through an errorless learning procedure.…

Stimulus generalization and contextual control affect the development of equivalence classes. Experiment 1 demonstrated primary stimulus generalization from the members of trained equivalence classes. Adults were taught to match six spoken Icelandic nouns and corresponding printed words and pictures to one another in computerized three-choice…

A shift in generalization gradients away from S+ and towards stimuli on the opposite end of the stimulus dimension from S- is a well established phenomenon in the laboratory, occurring with humans and nonhumans and with a wide range of stimuli. The phenomenon of gradient shifts has also been observed to have an analogous relationship to a variety…

Two studies examined the impact of temporal synchrony on infants' learning of and memory for sight-sound pairs. Findings indicated that 7-month-olds had no difficulty learning auditory-visual pairs regardless of temporal synchrony, remembering them 10 minutes later and 1 week later. Three-month-olds showed poorer learning in no-synchrony than in…

Rejoinder to PS 502 062 which in turn is an alternative analysis of authors' study presented in PS 502 061. (MB)

Fifty participants were exposed to a simple discrimination-training procedure during which six S+ functions were established for six arbitrary stimuli, and S- functions were established for a further six stimuli. Following this training, each participant was exposed to one of five conditions. In the S+ condition, participants were exposed to a…

Alternative analysis to study reported in PS 502 061. Rejoinder presented in PS 502 063. (MB)

A comparative assessment of eight normal and eight psychotic children in a stimulus generalization paradigm using simple and complex figures. Six of the subjects fulfilled the criteria for infantile autism. (CM)

IN ORDER TO DISCOVER IF PUPILS COULD ARRIVE AT THEIR OWN RULES OR GENERALIZATIONS FROM DRILL (THUS SUGGESTING THAT TIME BE SPENT MORE PROFITABLY IN ADDITIONAL PRACTICE THAN IN EXPLANATION), FOUR DIFFERENT METHODS WERE TESTED. FOUR FRENCH AND FOUR SPANISH HIGH SCHOOL CLASSES WERE SUBJECTED TO EXPLANATIONS (1) BEFORE THE DRILL, (2) AFTER THE INITIAL…