Abstract
Purpose of the Research.-The purpose of this research was to determine the effectiveness of using slides and models as compared to conventional lecture-demonstration method of presenting introductory concepts of descriptive geometry as applied to practical engineering situations. Industrial sites and models provided the photographic setting for 35mm slides illustrating engineering and industrial applications of descriptive geometry principles. Procedure of the Research.-A total of 6,015 samples were taken from a total population of 361 engineering graphics students at Texas A&M University during the Spring Semester of 1970. The 362 students were divided into two groups designated as experimental and control. The major hypothesis of the study was that photographic slides supplemented by realistic models would be more effective than the conventional method of introducing descriptive geometry concepts as applied to practical engineering problems. The major hypothesis was tested by four null hypotheses which stated that there would be no significant difference between groups in student's achievement, student's ability to visualize spatial relations, student's preference of methods, and instructor's utilization of presentation time. Separate methods of testing were developed for each null hypothesis. Achievement differences were compared by using a comprehensive descriptive geometry examination which served as the pre-test and post-test. In addition to the comprehensive examination, regular departmental weekly quizzes and over-all semester grade averages were compared..
McCage, Ronald Dale (1971). A comparison of the use of slides and models to the conventional method of introducing descriptive geometry concepts. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -178671.