The PAI and feigning: A cautionary note on its use in forensic-correctional settings

Indicators of feigned PAI profiles were derived from comparisons of simulat ors instructed to feign and genuine patient groups. Concerns are raised reg arding whether these indicators are applicable to forensic and correctional populations and can be cross-validated with a known-groups comparison. Com piling data on 57 malingerers and 58 genuine patients from two forensic and correctional sites, three primary indicators of feigning, Negative Impress ion (NIM) scale, Malingering Index, and the Rogers Discriminant Function (R DF) were investigated. Results suggested that the RDF was not applicable to forensic referrals. However, NIM greater than or equal to 77T appeared to be a useful screen for forensic samples. In addition, convergent evidence o f feigning was found across designs (simulation and known-groups) and sampl es (non-forensic and forensic) for extreme elevations on NIM (greater than or equal to 110T) and Malingering Index (greater than or equal to 5).