Mathematical investigations pursued by two gifted students are presented. One is written by a boy age 9 with his follow-up at 11; he studied patterns to derive the factors for the difference of two squares. Another boy of 11 discovered formulas for slopes of tangent lines and areas under curves. (LS)

Twenty good spellers and 20 poor spellers at each grade level from two to five participated in a study of morphological and orthographic spelling pattern abstraction. Subjects completed a multiple choice test of nonsense words, a multiple choice test of real words, and a dictation test of nonsense words. Both groups showed developmental trends in…

The theory is developed and contrasted with other theories of pattern recognition in which concepts such as stimulus generalization, tuned detectors, and preprocessing play major roles. A relation of this theory to problems encountered among disabled readers ("dyslexics") is also brought out. (Author/BJG)

An activity sequence is described. Several aspects of a population problem are developed using isoperimetric graph paper and symmetry principles to derive general rules. (SD)

This pamphlet introduces the student to the basic ideas and procedures of transformational geometry through a series of worksheets. After developing intuitively the idea of rigid motion, vector diagrams are introduced, and translations are discussed in some detail. (SD)

Research analyzed: 1) the treatment of plurals in the Functional Basic Word List for Special Pupils (Stanwix House List), and 2) plural recognition by educable mentally handicapped (EMH) students. Review of the Stanwix House List revealed that plurals were treated as discrete vocabulary items. Using a small sample of EMH subjects, the researchers…

A long-range investigation is being made to define the characteristics required of a television system to simulate a visual environment which will permit target acquisition performance comparable to that obtained in the real world. In this portion of the investigation, target recognition performance under direct viewing conditions was compared…

The author addresses the need for a new acoustic recognition strategy, extending the position that any adequate grammar of a language must distinguish between auditory and articulatory knowledge. Reviewing the existing literature and theories of language and its acquisition, the author discusses their limitations and inadequacies in accounting for…

A previous study by Begg and Pavio found that subjects presented with concrete sentences were able to detect subsequent changes in meaning better than changes in wording. In contrast, with abstract sentences, wording changes were detected with greater facility than were changes in meaning. The present study assesses the effect of comprehension on…

Several games, which can be useful in the classroom for teaching problem solving strategies, are described. (SD)

Accuracy of memory for left-right orientation of single forms varying in meaningfulness and complexity was studied in 120 subjects at 5 age levels from kindergarten to adulthood. Complexity was found to be unimportant, but orientation of meaningful figures was remembered better than orientation of non-meaningful figures at all ages. (GO)

Similar rectangles are the basis of a set of activities using newspaper. Topics arising include infinite series and Pythagorean theorem. (MP)

These worksheets deal with sums of numbers. Students are asked to find the relationship between the last number in the series, the number of addends, and the sum. (MP)

Children are asked to describe the subtraction process or to describe a context in which subtraction may be used. (JLH)