At first, a t- test was conducted on pretest scores for the two treatment groups. The mean of the pretest scores for the participants in the group that studied collaboratively (3.4) was not significantly different than the group that studied individually (3.1). The t- test yielded a value (t=1.62, p>0.05) which was not statistically significant. Hence, it was concluded that pretest differences among treatment groups were not significant.
The posttest scores were then analyzed to determine the treatment effects using the t- test groups procedure which is appropriate for this research design. In addition, an analysis of covariance procedure was used to reduce the error variance by an amount proportional to the correlation between the pre and posttests. The correlation between the pretest and the posttest was significant (r=0.21, p