The Inventory of Problems-29 (IOP-29; Viglione, Giromini & Landis, 2017) is a new, brief, self-report measure designed to assist practitioners evaluating the credibility of various symptom presentations, including those related to (1) depression/anxiety, (2) psychosis/schizophrenia, (3) post-traumatic reactions, and (4) neuropsychological/intellectual dysfunction. It is comprised of 29 items, administered via classic, paper-and-pencil format, or online, using a tablet or a PC. By analyzing the responses to each of these 29 items, a logistic regression-derived formula generates the False Disorder Probability Score (FDS), a probability value reflecting the likelihood of drawing that specific IOP-29 from a group of experimental feigners versus a group of bona fide patients. Based on emerging research attesting to the utility of combining symptom validity with performance validity measures a new "add-on" feature of the IOP-29 has recently been developed. Named "IOP-M," its purpose is to detect malingered memory deficits. This half-day workshop will describe the research foundation for the IOP-29 and IOP-M in malingering evaluations and will present guidelines for their use in applied practice. Together, these two brief tests, each taking five to ten minutes, provide the most efficient symptom and performance measure for the busy practitioner. No prior experience with the IOP instruments is required.
Kevin S. McGrew, PhD
Educational & School Psychologist
Institute for Applied Psychometrics (IAP)