The results of the experiment demonstrated that Down's syndrome children are equal to non-disabled children matched on mental age, in their ability to discriminate between colors. Both Down's syndrome and non-disabled children made errors of the same kind. Other undifferentiated mentally handicapped children are less consistent in their color…

Four low-functioning mentally retarded subjects learned conditional discrimination performance in two-comparison auditory-visual and visual-visual identity matching-to-sample paradigms. Results suggested that acquisition of both positive and negative conditional relations may occur when developmentally limited individuals are trained wth…

Ten autistic children and 10 normal nursery school children, matched for mean developmental age, were presented with figure stimuli and had variable irrelevant cues in two-choice simultaneous discrimination learning. Performance of the autistic group did not vary as a function of irrelevant variability, a result attributed to poor performance of…

A go/no-go conditioned head-turn paradigm was used to examine the abilities of 6- and 12-month-olds to discriminate changes in temporal grouping and their perception of absolute and relative timing information when listening to patterns of white-noise bursts. (Author/RH)

Responses of symbol-naive and symbol-experienced severely mentally retarded persons to traditional orthographic letters and lexigram elements were compared. Overall, Ss's reponses to lexigrams were more accurate and faster than were responses to more complex combinations. It was concluded that perceptual features of lexigrams are easier to…

Mentally retarded children taught to discriminate the dimensions of a visual display using a matching-to-sample procedure that provided full verbal feedback of the reasons for successes and failures exhibited superiority in intradimensional transfer compared to a control group. Two years later, trained Ss maintained a slight advantage. (Author/CL)

Twenty 3- to 5-year-olds were required to discriminate between a simultaneously-presented pair of displays having common elements but differentiated by the presence of a distinctive feature in one of the displays. The effect of explicit verbal feedback for incorrect choices on the learning of discriminations was examined. (JH)

Subjects in three age groups judged absolute and relative frequencies of pictures and words presented in lists. There was relatively greater improvement with age in judgment of pictorial stimuli. Study results lend support to the frequency theory of discrimination learning. (DP)

Article describes experiment whereby it was established that with verbal-discrimination learning overt pronunciation facilitated a freer recall than covert pronunciation. (Author/MM)

Four- and five-year-old children (n=24) were put into two groups and trained to discriminate between two displays which could only be differentiated by a single distinctive feature located on one of the displays. Subjects trained with the distinctive feature located on the positive display learned the simultaneous discrimination while feature…

Presents experiments with a straight line seen for a short stimulus time in which the subjects perceived the line to lengthen from the point of fixation and then to shorten to the point of fixation immediately thereafter. (MB)