Conclusion

In summary, the two-way mixed design ANOVA is appropriate for a type of experimental design that is frequently used in social science research. In the most common form of this design, participants are divided on a group factor and provide repeated measures on the criterion variable at various time intervals. This analysis is easily handled by PROC GLM. Conducting the analysis with the REPEATED statement offers the advantage that the error terms for the various effects are automatically selected by the program, while conducting the analysis without the REPEATED statement allows you to request a number of post-hoc multiple comparison procedures.