Dr. Hayes lectured on the differences between within-subjects designs and between-subjects designs and noted that a within-subjects design enhances the power of studies because:

Dr. Hayes lectured on the differences between within-subjects designs and between-subjects designs and noted that a within-subjects design enhances the power of studies because:
A) it increases individual differences between conditions.
B) random assignment is used.
C) of attrition throughout the study.
D) it reduces issues with individual differences between conditions.

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