Comparison of 48 cerebral palsied individuals (aged 10-18), either with impaired speech or normal speech, found speech-impaired subjects were able to discriminate phoneme contrasts adequately in a word judgment task but performed less well on a phoneme discrimination "same-different" task possibly resulting from a weak memory for novel…

The effectiveness of three fading and two nonfading procedures were compared in training kindergarten children on an oddity problem in which shape was the relevant dimension. (SBT)

Four groups of well-functioning senior citizens (6 males and 18 females per group) over the age of 65 were presented with a series of discrimination-learning problems. All were provided four pretraining problems, appropriate to their individual condition, and encouraging self-pacing. Two levels of problem complexity (four-dimensional vs.…

This data on transfer and list identification, combined with those reported by Petrich et al. (1975), strongly suggest that the decision component is the major factor affecting the free recall of successive overlapping lists. This decision component is best described by Anderson and Bower's model (1972) of the roles of list tagging and contextual…

A total of 630 boys and girls from kindergarten to second grade were asked to compare durations that differ in beginning times with those that differ in ending times. Possible sources of children's failure to integrate beginning and end points when comparing durations were discussed. (Author/CI)

Results from the data analysis show that children learn mathematical concepts for clear cases, and that an analysis of attributes common to examples of a given concept is not a prerequisite to concept formation. The protocol findings provide information as to why this may be happening. (Author/PN)

The perirhinal cortex is known to be important for memory, but there has recently been interest in the possibility that it might also be involved in visual perceptual functions. In four experiments, we assessed visual discrimination ability and visual discrimination learning in severely amnesic patients with large medial temporal lobe lesions that…

This experiment examined the effects of reinforcement probability on resistance to change of remembering and response rate. Pigeons responded on a two- component multiple schedule in which completion of a variable-interval 20-s schedule produced delayed matching-to-sample trials in both components. Each session included four delays (0.1 s, 2 s, 4…

Two studies of 7-year-olds and college students tested the hypothesis of a developmental difference in the degree to which subjects' memory performance was controlled by categorical properties vs. specific instance properties of test items. (GO)

The purpose of the two experiments was to assess the effects of two levels of stimulus redundancy and three levels of irrelevant visual stimulation on performance in a successive discrimination task and a reproduction task. The results indicate that increases in redundancy facilitated performance in the reproduction task but had no appreciable…

This experiment examines extended learning over a 4-day period in infants exposed to responsive and unresponsive wooden mobiles. Frequency of kicks and attention to the mobile increased over the first three days and was found to vary with the introduction of a novel mobile on day four. (GO)