Research Question 2
Will there be a significant difference in achievement on a test comprised of "critical- thinking" items between students learning individually and students learning collaboratively?
The mean of the posttest scores for the participants in the group that studied collaboratively (12.21) was higher than the group that studied individually (8.63). A t- test on the data showed that this difference was significant at the 0.001 alpha level. This result is presented in Table 1. An analysis of covariance yielded a F-value that was significant at the same alpha level (F=3.69, p