An experiment was conducted to determine sex differences in the effects of caffeine on memory (http://www.lifesci.sussex.ac.uk/home/Zoltan_Dienes/RM%20II%20SPSS%20%202-way%20mixed.doc). Within-subjects factors were measured as LOWCAFF, MEDCAFF and HIGHCAFF, and between-subjects factors given as MALE or FEMALE. The following output was obtained. What does this output mean?
Source: http://www.lifesci.sussex.ac.uk/home/Zoltan_Dienes/RM%20II%20SPSS%20%202-way%20mixed.doc
A. The sphericity assumption is satisfied.
B. The sphericity assumption has been violated.
C. Sphericity for caffeine is significant.
D. None of the above.
Answer: A
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