Reviews theories of language origin with particular reference to Morris Swadesh's The Origin and Diversification of Language'', Chicago: Aldine-Atherton, 1971. (RS)

Based on an unpublished doctoral dissertation, Department of Psychology, University of North Carolina at Chapel Hill, 1969. (RS)

Research supported by a grant from the National Institutes of Health. (DD)

An experiment assigned in a role-playing'' modern physics lab for juniors who are challenged to obtain accurate measurement with suboptimum apparatus through correct analysis. They also investigate the influence of systematic errors using a small computer. (DF)

Experiments were designed and carried out in an attempt to identify some parameters relating to ease of manual searching in library catalogs. A comparison of the difficulty of searching the same file in card form and book form indicated that searching the book catalog generally requires more time. (4 references) (Author/NH)

Describes an experiment in which the achievement of a high school class graded on a pass-no pass system was found to be equal to that of a close receiving traditional letter grades. (SP)

An unusual science program which centers around a vivarium and is based on the notion that students learn science by doing it, not just talking about it. (DF)

Describes a physics laboratory course which operates without written instructions and with no required experiments. Course is based upon one- or two-week topics in mechanics, heat, electromagnetism and optics with a student-designed experiment in modern physics as an extended project. (DF)