Humans perceptually extract quantity information from our environments, be it from simple stimuli in isolation, or from relational magnitudes formed by taking ratios of pairs of simple stimuli. Some have proposed that these two types of magnitude are processed by a common system, whereas others have proposed separate systems. To test these…

If learning is viewed in terms of the tendency to approach a stimulus that has been rewarded and to avoid a stimulus that has not been rewarded, then it must be concluded that the subjects in this study did not learn. (Author)

To investigate developmental changes across age and sex in acquisition of form discrimination, 40 children aged 3 and 4 were presented with a rotated, letter-like form discrimination matching task. (JC)

Comparison of the auditory frequency resolving ability of preschool children, school-aged children, and adults found data from children as young as three-years-old that were qualitatively indistinguishable from adult data though threshold estimates from young children were more variable from run to run than from adults. Increasing age improved…

Purpose of the present experiment was to compare performance of four- and six-year-olds on a conjunctive concept task in which the two relevant values were either within a single dimension (unidimensional) or from two different dimensions (bidimensional). (Authors)

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)

Discrimination learning set performance was examined in preschool children as a function of age and number of trials per problem. Subjects were 120 children three, four, five, and six years old. (MP)

Experiment designed to collect further data related to the type of solution applied to the learning of a multiple-problem (ten) oddity discrimination. (Author)

This study examined the ability of preschool children to process and use conceptual category information in a disrcimination learning task. A total of 60 boys and girls between the ages of 2 1/2 and 4 years completed a 3-choice discrimination learning task. On each of 12 trials, a child was presented with three magazine photographs: one of an…

Liniar functions fitted to the proportion of optional reversal shifts as a function of log CA were used to assess the effect of stimulus and training variables on the development of reversal-shift. (ST)

Project carried out under Contract No. PH 43 65-1011 between the Public Health Service, National Institutes of Child Health and Human Development and the Fels Research Institute.