To evaluate reel audio tape, tests were performed to identify: signal-to-noise ratio, total harmonic distortion, dynamic response, frequency response, biased and virgin tape noise, dropout susceptibility and oxide coating uniformity. (SCC)

A project at Loyola University introduced microcomputers into the animal operant laboratory taught in conjunction with a course on the psychology of learning. An IBM-compatible (Zenith) microcomputer, interfacing components, and the OPERANT/PC software program were selected to control the operant chambers and collect data. An instructor-generated…

An electronic device is described which can be used for demonstrations and laboratory work in Fourier synthesis, phase and group speeds, beats and modulation, and Lissajous figures. The hardware required is inexpensive and simple. (Author/RH)

Discussed are past work and recent advances in the use of electron microscopes for viewing structures immersed in gas and liquid. Improved environmental chambers make it possible to examine wet specimens easily. (Author/RH)

Differential fixation to novel stimuli was obtained from 4-month-old infants to test the discrepancy hypothesis, which predicts a curvilinear relationship between degree of discrepancy and attention. (ST)

Presents information about new apparatus, equipment, and literature. Equipment includes such things as an educational computer, computerized analyzer, gas chromatograph, and laboratory extruder. New literature includes catalogs and pamphlets presenting technical data and procedures in areas such as water analysis, titrimetric procedures and…