After tachistoscopic exposure of a row of letters, recall functions show bowing and skewedness similar to the standard serial position curve that results from sequential presentation of elements. A similar curve is generated by recall of binary elements presented briefly and simultaneously. Prior investigators have interpreted this effect as an…

Educable mental retardates and normal grade school students were presented seven classes of materials in both visual and auditory modalities for the determination of immediate memory span thresholds. Major conclusions included auditory presentation produces higher thresholds than visual, and retarded children may employ different processing…

Factor analyses of the Wechsler Intelligence Scale for Children-Revised (WISC-R) have typically yielded three factors: two generally understood to reflect basic verbal and performance dimensions and one about which there is no consensus with regard to what is measured. The aim of the present study is to elaborate the meaning of the third factor by…

Reported is a test of retention related to a weight, texture, and force experiment performed by a group of 120 first grade students who had been randomly grouped into three treatment strategies. The results of the retention task, accuracy test, an analysis of the strategies used on both posttests and retention tests, and some miscellaneous post…

The purpose of this study was to evaluate a practical procedure for determining the optimum sequencing of pictorial classification tasks in science using mean difficulty indices generated by a standard sample of grade two students. Acquisition of such skills can affect the learner's performance on subsequent material and the teacher's efforts in…

In order to verify claims made by Genevan researchers that linguistic production but not comprehension capabilities distinguish seriators from nonseriators, three tasks were administered to children between the ages of four and eight. Subjects were asked to arrange in order objects varying in size, to describe how the objects differed from each…