Table 1. Criteria used to assign participants to the four groups of the present study.

	Known-Group Comparison (KGC)	Simulation Design (SD)
Controls	n = 35 –Mental disorders (Axis I) diagnosed before and after imprisonment –Above SCL-90-R cutoff –Requested to respond honestly	n = 36 –No history of mental disorders, free from psychoactive drugs –Below SCL-90-R cutoff –Requested to respond honestly
Malingerers (SM)	n = 22 –Mental disorders (Axis I) diagnosed only after imprisonment –Below SCL-90-R cutoff –Requested to respond honestly	n = 35 –No history of mental disorders, free from psychoactive drugs –Below SCL-90-R cutoff –Requested to simulate mental illness

Notes.

Axis I refers to DSM IV-TR classification (American Psychiatric Association, 2000). The names of the groups of participants adopted in the text arise from the combination of those used in this Table: KGC_SM, suspected malingerers; SD_SM, simulated malingerers; KGC_Controls, genuine patients; SD_Controls, controls of the SD requested to respond honestly. For clarifications, see text.