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Table 9. 
Additional Assessment Differences between Performance Types
MeasurePerformance Typetdfp
Lower, M (SD)Higher, M (SD)
Symbol span 26 (7) 29 (7) 2.05 108 .04 
AIM 17 (2) 18 (2) 2.11 100 .037 
AIM + memory 17 (2) 18 (1) 3.14 100 .002 
Verbal analogies 87% (7%) 92% (8%) 2.85 107 .005 
Scene analogies (SST) 57% (19%) 69% (18%) 3.26 107 .001 
MeasurePerformance Typetdfp
Lower, M (SD)Higher, M (SD)
Symbol span 26 (7) 29 (7) 2.05 108 .04 
AIM 17 (2) 18 (2) 2.11 100 .037 
AIM + memory 17 (2) 18 (1) 3.14 100 .002 
Verbal analogies 87% (7%) 92% (8%) 2.85 107 .005 
Scene analogies (SST) 57% (19%) 69% (18%) 3.26 107 .001 

Differences in degrees of freedom across assessments resulted from computer malfunction-related data loss (see Methods under Performance Types).

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