The results of a nonrandomized experiment indicated that the group of students who observed the static presentations of graphic images achieved slightly higher scores on the paper-and-pencil performance tests, whereas the group of students who viewed the dynamic presentations made greater gains on the mental rotation tests. (JJK)

Described are improvements for the computer efficiency of the two midpoint scan-conversion algorithms used to draw ellipses. Included are computer programs written in C programing language. (JJK)

Explains the approach taken at Colorado State University in a collegewide undergraduate computer-aided design (CAD) course. Reviews the topic areas covered, project requirements, and assesses the use of high-performance graphics devices. (ML)

An experimental group of students from an introductory engineering graphics class was required to watch 30 videotapes that presented basic concepts of engineering graphics, whereas a control group had no access to the videotapes. No differences were established between the groups. (JJK)

A computerized method is described whereby a mirror image pair of drawings, simultaneously drawn by the right and the left hands, can be compared. This BASIC computer program, which is available from the authors, has applications to a variety of psychological studies. (Author/JJK)