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)

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)

Results suggest that kindergarten children extinguish mediating responses faster than instrumental choice responses while the reverse probably holds with second graders. (Authors)

Subjects were trained against their initial dimensional preference in a two-dimensional simultaneous discrimination learning task. (RH)

Studies based on an analysis of one species of learning and transfer task, the transposition problem, in terms of two ways in which the experimenter's and the child's definition may differ. (Author)

Investigates to what extent discrimination learning through time delay of multistimulus, distinctive-feature prompts is a function of the inclusion and configuration of the S-prompt. Results of two experiments with children aged four and five indicate that most subjects did not learn the task assigned unless two distinctive-feature prompts were…

This study investigated the effects of two stimulus manipulations (spatial distinctness and number of dimensions) on the performance of 24 kindergartners and 24 fifth graders in (1) tasks requiring distributed attention and (2) tasks requiring selective attention. Results suggest that kindergartners attempt to use one processing mode (distributed…

One hundred and eight kindergarten and elementary school children, 36 at each of three age levels (5, 7, and 9 years) participated in the experiment. All children were presented a three-part successive discrimination task; original learning, presentation of incidental stimuli, and a test of recongition and recall of the incidental material.…

Four-, five-, and six-year-old children were used as subjects in this investigation. There were 192 experimental and 96 control children used, divided equally between the three age groups. The experimental children received a 1-minute pretest exposure procedure in which 1/4 of the children observed 4 two-dimensional stimuli (irregular pentagons),…

Two experiments comprised this study comparing the ability of children from ages 4 to 12 years to discriminate the order in which items from a previously presented sequence of stimuli had been presented. The hypotheses were that the discrimination of recency (DR) improves with age, that broader separations of test items are easier to discriminate…

In order to examine the nature of dimensional processing in children, 20 kindergarten and 20 third grade Chinese-American children were asked to make similarity judgments for unidimensional sets of stimuli differing in color (hue), size, and shape, respectively. Age differences were generally confined to the color set. The judgments of the older…

In the first experiment, the development of the ability to copy alphabet letters by black males aged 3-9 (middle and low S.E.S.) was studied, using a newly-developed scoring system. In the second experiment, kindergarteners learned to associate letter names with six lower-case printed letters by the anticipation method. The addition of an…