Inability of the Rarely Missed Index to identify simulated malingering under more realistic assessment conditions.
The Wechsler Memory Scale-III (WMS-III) Rarely Missed Index (RMI) was developed by Killgore and DellaPietra (1999b, 2000b, 2001) to detect malingering. Its development was based on item-response biases in the Logical Memory Delayed Recognition (LMDR) items of the WMS-III (Killgore & DellaPietra, 1999a, 2000a). We completed replication studies using undergraduates, analog malingerers, and patients. In Experiment 1, 100 undergraduates naive to the WMS-III Logical Memory stories were administered the LMDR, and item-response biases were explored. In Experiment 2, 49 undergraduates feigned brain injury on cognitive and symptom validity tests. Data were also extracted from 83 traumatic brain injury (TBI), dementia, psychiatric/pain, stroke, and other patient files. Neither the previously reported item-response biases nor the diagnostic utility of the RMI in identifying simulated malingerers were replicated.
Swihart
Andrew A
AA
Department of Psychology, Saginaw Valley State University, University Center, MI 48710, USA. aswihart@svsu.edu
Harris
Kristen M
KM
Hatcher
Larry L
LL
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008306:Malingering / Q000175:diagnosis*; D008569:Memory Disorders / Q000175:diagnosis*; D011939:Mental Recall / Q000502:physiology*; D009483:Neuropsychological Tests; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D055815:Young Adult