The development of the ability to associate numerals with sets of appropriate size was studied in children, ages 4 to 5-1/2. (ST)

Mathematically analyzes the polarization of rainbows, a phenomenon which can be demonstrated in a laboratory simulation using polaroid sheets, perspex discs, and a white light source. (MLH)

Electrets, the electrical counterparts of magnets, are polarized dielectrics that are permanent on a scale of months. Describes procedures for making electrets out of plastic sheets like Mylar, for testing them and measuring their pole strengths, and for establishing necessary and sufficient demonstrations that they are not simply surface charged.…

This textbook aims to fill the need of an Introduction to Chemical Analysis, solely designed for use in the laboratory. This text presents simple rules for conducting chemical analyses to help students arrive at the most reliable results. This third edition has increased the examples for practice in quantitative and especially volumetric analysis.…

AN EVALUATION WAS MADE OF THREE METHODS OF PRESENTING SCIENCE LABORATORY EXERCISES COMBINED WITH PROGRAMED INSTRUCTION. FIVE EXPERIMENTS WITH EIGHTH-GRADE STUDENTS WERE CONDUCTED TO EVALUATE TEMPORAL RELATIONSHIPS BETWEEN THE METHODS AND THE EFFECTS OF THE METHODS. MEASURES OF ABILITY TO SOLVE WORK AND ENERGY PROBLEMS WERE OBTAINED FROM SUBJECTS…

Research on crime and delinquents is generally studying norm-violating behavior outside of its social context. Building on Hartshorne and May's use of situational tests, the authors sought to study the major contributing variables to norm-violating behavior in a laboratory setting. Two groups of subjects were used: (1) 116 male college students;…

This monograph was written for the Conference on the New Instructional Materials in Physics, held at the University of Washington in summer, 1965. It describes a series of experiments designed to demonstrate the behavior of a system of macroscopic particles whose interactions are of very short range. The apparatus for the experiments include a…

This study obtains evidence for the effect of time of day on learning in a stressful situation. A series of five experiments were performed to assess the effects of this variable on learning using albino rat subjects. None of the experiments provide overwhelming evidence for the effect of time of day when taken alone and each leaves questions…

The present volume was compiled by the AAPT Committee on Apparatus for Educational Institutions and by the AAPT-AIP Center for Education Apparatus in Physics to assist physics departments in the never-ending task of keeping their undergraduate laboratories up to date. The purpose of the book is to put before physics teachers for their…

This publication of the American Physiological Society provides information about some new classroom experiments and techniques. These are: "Negative Feedback Control in the Blowfly--A Laboratory Exercise,""Demonstration of Various Habitats for Investigating Murine Behavior Patterns," and "Use of Behavioral Objectives and Audio-Visual Tutorial…

Since many acts of aggression in society are more than simply an aggressor-victim encounter, the role played by third person instigated aggression also needs examination. The purpose of this study was to develop a laboratory procedure to systematically investigate instigation. In a competitive reaction time task, high and low Machiavellian Males…