Describes a reaction system experiment utilizing saponification of ethyl acetate by sodium hydroxide. The activity is part of an undergraduate chemical engineering course. (SL)

Experiments by secondary school students which inflict pain and suffering are described. NSTA policy regarding the use of live animals is presented. An argument for the use of animals in research is given along with a recommendation by the author that animal projects should show a reverence for life. (AJ)

Three experiments carried out second-order Pavlovian conditioning using either similar or dissimilar first-and second-order stimuli. All three experiments were designed to identify the effects of similarity upon conditioning as distinct from its effects upon sensitization or stimulus generalization. (Editor/RK)

Three experiments investigated the nature of false recognition errors made after incidental learning that required acoustic or semantic analysis. (Editor)

This research used tasks analogous to Delayed Matching-to-Sample tasks to study pigeons' Short Term Memory for responses and reinforcers, as well as for more conventional stimuli. The broad question is whether stimulus, response, and reinforcer memories are all influenced in the same way by the same independent variables. (Author/RK)

This experiment examined the learning of affective and neutral words in a paired-associate list for chronic schizophrenics and normals. It was predicted that, relative to normals, the chronic schizophrenics would learn much fewer affective words than neutral words. (Author)

Three experiments examined the role of various sources of feedback in the development and maintenance of a complex ballistic skill, dart throwing, using extended practice. (Editor)

Reading reaction time (RT) to visual stimuli was shown to vary according to the nature of simultaneous auditory stimuli. A two-stage model was proposed to explain the results in which parallel processing of simultaneous input occurs prior to a decision-making stage. (Editor)

In recent years several models of human-information processing have been proposed in which the central component is a limited-capacity processing system. One line of research has focused on the question of which stages in the processing sequence require capacity in this system. This research is concerned with time and capacity demands in…

There are many tasks in which people are called on to disregard information that they have already processed. Dealing with inadmissible evidence in a courtroom setting, second-guessing the past, etc. This research investigates such difficulties in a general form, using almanac-type questions. (Editor/RK)

Smaller amounts of materials are used in organic chemistry experiments as a means of improving air quality in the laboratory. Presents a preliminary study of the emissions from selected processes and the mixing of these emissions within the laboratory atmosphere. (JN)

To have students develop observational skills and acquire an excitement about chemistry, stereoscopic dissecting microscopes are used to observe the physical characteristics and chemical reactions of various substances. Several of these reactions (including dissolving potassium permanganate in deionized water and reactions between copper metal and…

The International System of Units (SI) or the metric system contains related units which make science simpler for students and teachers. By emphasizing descriptive units, requiring unit use throughout calculations, and using negative exponents, teachers can help students have a better understanding of energy, pressure, and mass concepts. (DH)

Computational science is defined as science done on a computer. A computer can serve as a laboratory for researchers who cannot experiment with their subjects, and as a calculator for those who otherwise might need centuries to solve some problems mathematically. The National Science Foundation's support of supercomputers is discussed. (MLW)

Explains the use of a convex lens as a thick mirror. Shows the expression for the power of this type mirror. (YP)