Psychometric Validation of a Simplified Form of the PICTS for Low-Reading Level Populations

The Psychological Inventory of Criminal Thinking Styles (PICTS) is one of the most widely used measures of criminal thinking. Although the PICTS has adequate psychometric qualities with many general population inmates, the measurement confound of reading ability may decrease its construct validity in low-literacy inmates. To help resolve this confound, we present psychometric evaluation of a simplified version of the PICTS (PICTS-SV) in which item language was simplified but item content was preserved. We first conducted Lexile analyses to confirm the reading level of the PICTS-SV is significantly lower than the original PICTS (i.e., sixth grade versus ninth grade). We then tested a bifactor model to confirm the PICTS-SV contains the same two factors as the original PICTS: proactive and reactive criminal thinking. These PICTS-SV results are commensurate with the factor structure of the original PICTS. Results suggest the PICTS-SV is a valid alternative for assessing criminal thinking in inmates with low reading ability.