The IOP Instruments and the Relationship between Symptom and Performance

Friday, June 3, 2022
11:30 AM - 4:30 PM (EDT)
Zoom information will be provided to registrants at a later date.
Category: Training

The IOP Instruments and the Complex Relationship between Symptom and Performance Validity Assessment

June 3 | 11:30 am - 4:30 pm ET | 3.5 CE Credits

To register for any event, please login to your member or non-member profile on the SPA Website.


The Inventory of Problems – 29 (IOP-29; Viglione, Giromini & Landis, 2017) is a brief and effective symptom validity test (SVT). It is 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. Comprised of 29 items, it can be 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 format is that of a brief, forced-choice, performance validity test (PVT). This half-day workshop will first review available research informing on the complex relationship between symptom and performance validity assessment. Then, it will describe the research foundation for using the IOP-29 and IOP-M in malingering evaluations and it 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.

Goals and Objectives:

1. Describe the research findings observed when investigating the complex relationship between symptom and performance validity assessment

2. Understand the research foundation for using the IOP-29 and IOP-M to evaluate the credibility of various mental illness complaints

3. Compare the efficacy of the IOP-29 and IOP-M versus other available tools such as SIMS, TOMM, PAI and MMPI

4. Administer and score the IOP-29 and IOP-M

5. Interpret and integrate the results of IOP-29 and IOP-M

Skill Level:

No prior experience with the IOP instruments is required, and all psychologists and graduate students at all levels of training may attend this introductory workshop.


Registration is now open!

Member Type  Rate
Student Member $124
Early-Career Member $174
Member/Fellow/Associate $249
Student Non-Member $154
Early-Career Non-Member $234
Non-member $324


Dr. GirominiLuciano Giromini, PhD, is an Associate Professor in the Department of Psychology, and core faculty member for the Ph.D. program in Psychological, Anthropological and Educational Sciences of the University of Turin, Italy. He has taught psychological assessment and psychometrics at two Italian and one Californian universities, and is currently the coordinator of the Evidence-Based Psychological Assessment research team of University of Turin. He is the Assessment Section Head of the journal Psychological Injury and Law, and a consulting editor of several assessment journals, including Journal of Personality Assessment and Psychological Assessment. Luciano Giromini is also one of the authors of the Inventory of Problems (IOP-29 and IOP-M).

Donald J. Viglione, PhD is a Distinguished Professor at Alliant International University in San Diego. He maintains an active practice in clinical, forensic, and high-stakes assessment, as well as supervising graduate practicum students. He has published over 100 articles and presented or co-presented approximately 70 workshops and 140 presentations around the U.S., Europe, South America, and Brazil. He teaches applied and psychometric assessment courses. He has served as the Director of the Clinical Ph.D. and Clinical Psy.D. Programs at Alliant. Donald J Viglione is also one of the authors of the Inventory of Problems (IOP-29 and IOP-M).

The Society for Personality Assessment (SPA) is approved by the American Psychological Association to sponsor continuing education for psychologists. SPA maintains responsibility for this program and its content. 

For More Information:

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