Use and misuse of repeated measures designs.

Repeated measures designs should be used more frequently in prevention intervention research. They are the design of choice when one or more measurements have been taken at baseline followed by one or more measurements after prevention intervention. They may be used to ask questions about differences on measurements at different points in time and between measures made on the same scale. In this presentation, prevention intervention researchers are provided with a step-by-step discussion of this design, examples of prevention intervention repeated measures designs, and a discussion of the misuses of this design.