To compare the relative achievement levels of groups of individuals, pairs, and trios working at electronics technology laboratory stations, an experimental study was designed using three intact classes totaling 96 laboratory students in an undergraduate electricity/electronics course. One group of students worked the 12 laboratory experiments as individuals, while a second group worked the experiments as randomly assigned pairs and the third group as randomly assigned trios. The students were administered a pretest, an attitude inventory, and two posttests measuring cognitive and psychomotor achievement. A comparison of the individuals and pairs failed to indicate a significant difference on the psychomotor and cognitive posttests. However, the group of pairs did score significantly higher on both the psychomotor and cognitive posttests than did the group of trios. Further, the individuals scored significantly higher on the cognitive test than did the trios but did not differ on the psychomotor test. The group of pairs rated the contribution of the partner to the learning situation higher than did the group of trios. On the basis of these and other findings and conclusions, it was recommended that students work in pairs at laboratory stations and that the laboratory grade be based on assessment of both psychomotor and cognitive skills. Sample instruments are appended. (Author/SB)