The classes comprising the control group were organized into two-hour class sessions. The instructor used two-hour sessions on two consecutive days for teaching using a lecture-discussion tech-nique. The written evaluation was given during the first hour of the third day.
The treatment groups were given general instructions about operating the microcomputer learning program and were told they could spend a maximum of four hours in the laboratory working with the microcomputer –assisted instruction The instructor who taught the control group was in the microcomputer laboratory to respond to questions and monitor student progress. Student were given two days to complete the task, were asked to keep a record of the amount of time used, and were given the written evaluation during a one-hour time period of the third day.