The third of a series, this article describes prototype experiments which place human decision makers in an interactive decision-making situation, presents results typical of those thus far observed in the prototype experiments, and describes preliminary analysis of the data. Three references are listed. (FM)

Presents three simple water activities, for grades 4-6, to teach about molecular attraction as seen in surface tension and cohesion. (Author/SJL)

Outlines eight science experiments that require no materials except household trash. (SJL)

This section presents new ideas with regard to apparatus for teaching physics. The following four ideas are presented: (1) measuring speed of light (2) a poor man's barometer, (3) center of mass of a rotating object, and (4) minimizing glass breakage. (HM)

Investigates spatial orientation of infants, comparing behavior in the laboratory to behavior in the infant's home. Also investigates whether the infant relies on his body as a spatial reference system. (Author/SS)

The present experiments were designed to study the effects of search term weighting based on very limited relevance information, supplied, for example, by one or two relevant documents. The tests simulated iterative searching as in an on-line system and show that even very little relevance information can be extremely valuable. A list of…

Deals with selective attention phenomena and elaborates on a stimulus material classification, "stimulus set" versus "response set", proposed by Broadbent (1970, 1971).

Describes some experiments with monkeys that "can provide us with vital and unexpected information about the organization of the human brain", according to Dr. James H. Dewson, a Stanford University scientist. (Editor/RK)

Investigates the differences between rehearsal span and memory span and evaluates the research of Dalrymple-Alford (1967) on the part of rehearsal on reinforcing memory traces. (Author/RK)

In an effort to help develop practical applications of alternative energy, a wind turbine generator is to be mounted on a 40-foot tower on the roof of a Columbia University building. (Author/MLF)

Describes an alternative technique for determining the molar volume of hydrogen from the metal-acid reaction in which the metal sample is encased in a specially prepared cage and a pipette filler is used to fill an inverted burette with water. Eliminates some difficulties encountered with the conventional technique. (JRH)