1. Identify the specific design ofthe study. Was the best designselected to direct this study? Does the design provide ameans to examine all of theobjectives, questions, orhypotheses and the study purpose?3. Does the study include atreatment or intervention? If so,is the treatment clearlydescribed and consistentlyimplemented?4. Are the extraneous variablesidentified and controlled?6. Identify the threats to designvalidity (statistical conclusionvalidity, internal validity,construct validity, and externalvalidity).