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Critical Item Analysis Enhances the Classification Accuracy of the Logical Memory Recognition Trial as a Performance
Alexa Dunn1, Sadie Pyne2, Brad Tyson3
1Department of Psychology, University of Windsor, Windsor, Canada.
Objective:
: Replicate previous research on Logical Memory Recognition (LM) and perform a critical item analysis.
Method:
: Performance validity was psychometrically operationalized in a mixed clinical sample of 213 adults. Classification of the LM and nine critical items (CR-9) was computed.
Results:
: LM ≤20 produced a good combination of sensitivity (.30-.35) and specificity (.89-.90). CR-9 ≥5 and ≥6 had comparable classification accuracy. CR-9 ≥5 increased sensitivity by 4% over LM ≤20; CR-9 ≥6 increased specificity by 6-8% over LM ≤20; CR-9 ≥7 increased specificity by 8-15%.
Conclusions:
: Critical item analysis enhances the classification accuracy of the optimal LM cutoff (≤20).
