Discrimination learning studied in 3-year-olds, indicated that children over 30 months of age did better than younger children, and girls learned faster than boys after the first problem. (ST)

Twelve moderately retarded children were trained on 2-choice visual discrimination problems with interpolation of another item between training and retention tests. Results indicated that well-learned items are rehearsed less. (SBT)

STUDIES HAVE SHOWN THAT IT IS POSSIBLE TO ESTABLISH DISCRIMINATORY RESPONSES TO PAIRS OF STIMULI WITHOUT ERROR RESPONSES TO THE UNREINFORCED (S-) STIMULUS. THE PURPOSE OF THIS STUDY WAS TO DETERMINE THE EFFECTS OF 2 METHODS OF INTRODUCING S- (FADING AND CONSTANT) AND 2 RESPONSE CONTINGENCIES (DELAY AND NO DELAY) ON THE OCCURRENCE OF S- RESPONSES.…

This study tested the assimilation of an auditory-visual stimulus configuration in 32 infants aged 15 to 16 weeks. The infants' discrimination of matched and mismatched auditory-visual stimuli indicated that infants by 4 months of age are capable of constructing bimodal schemata. (JMB)

Serial habituation of visual fixations was investigated through a design permitting cross-sectional, within-subject longitudinal, cohort longitudinal, and time-lag analyses. Results suggested that for all ages habituation was under way to the parts of the stimulus in order of the realitive saliencies. No one methodology appeared to significantly…

Kindergarten children were trained to make same-different judgments of either 2 or 4 standard figures under either 2 or 4 transformations before being transferred to a novel set of figures. (Editor)

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)

Results indicate that for children in this study's age range orientation is a less salient discriminative cue than either size or color. (Author/MB)

A version of the paper was presented at the American Association on Mental Deficiency (Boston, May, 1968). (JM)

Tests the effects of stimulus variability on overgeneralization and overdiscrimination errors in children and adults. The subjects (n=64), adults and five-, seven-, and nine-year-old children, participated in a visual discrimination task. (CM)

Results indicated the following: unitary stimuli were easier to encode; partitioned stimuli were easier to recode; recoding was much more difficult than encoding; extended training improved performance; second graders were slightly better at encoding and much better at recoding than were kindergarten children. (Author/DB)