Which of the following best illustrates why would we expect a reduction of error variance in a within-subjects design?
a. Stephen's behavior in situations A, B, and C is more similar than Mary's, Kevin's, and Stuart's behaviors in situation X, Y, and Z.
b. Stephen's behavior in situations A, B, and C is less similar than Mary's, Kevin's, and Stuart behaviors in situations X, Y, and Z.
c. Stephen's behavior in situation A is similar to Mary's, Kevin's, and Stuart's behaviors in situation A.
d. Stephen's behavior in situation A is not similar to Mary's, Kevin's, and Stuart behaviors in situation A.
A
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