To insure a wide dissemination of information describing advances in measurement and control techniques, the Instrument Society of America (ISA) has published this monograph of selected papers, the second in a series, from recent ISA symposia dealing with air pollution. Papers range from a discussion of individual pollutant measurements to…

This paper reports on an experiment designed to collect data on children's perception and use of semantic attributes. Forty-five children ranging in age from 2 years 8 months to 6 years were given a picture test involving judgment of similarities between objects. The test consisted of 47 groups of pictures; each group contained a stimulus or a…

Many analyses are presented which attempt to examine the teaching of young children by teachers and parents. Teaching is comprehensively defined as behavior which influences someone's learning or development. The analysis of teaching is considered in light of the factor of efficiency of communication. Analyses are arranged on an operationality…