Found that the following variables significantly affected the students' performance of a task involving science skills: type of rule and number of attributes used in the prediction task, and whether the student was given a verbal description of the rule to be used. (MLH)

A sample of 228 elementary school children in a large eastern city was administered tasks which tested visual perceptions of solid objects, and photographs and drawings of these objects. Results showed that children in grades one, four, and six demonstrate a tendency to perform more efficiently on observation and comparison tasks employing solid…