Objective: The objective of this study was to assess the MOXO-d-CPT utility in detecting feigned ADHD and establish cutoffs with adequate specificity and sensitivity. Method: The study had two phases. First, using a prospective design, healthy adults who simulated ADHD were compared with healthy controls and ADHD patients who performed the tasks to the best of their ability (n = 47 per group). Participants performed the MOXO-d-CPT and an established performance validity test (PVT). Second, the MOXO-d-CPT classification accuracy, employed in Phase 1, was retrospectively compared with archival data of 47 ADHD patients and age-matched healthy controls. Results: Simulators performed significantly worse on all MOXO-d-CPT indices than healthy controls and ADHD patients. Three MOXO-d-CPT indices (attention, hyperactivity, impulsivity) and a scale combining these indices showed adequate discriminative capacity. Conclusion: The MOXO-d-CPT showed promise for the detection of feigned ADHD and, pending replication, can be employed for this aim in clinical practice and ADHD research.
Bibliographical noteFunding Information:
The research reported in this article was completed as part of the second author’s (Astar Lev) MA dissertation (Bar-Ilan University, Ramat Gan, Israel) and the undergraduate program requirements of Adi Narov, Adi Zafris, Amit Yarkoni, Eden Katzav, Ela Drookman, Sean Shachar, Shlomo Shreibman, and Tzoor Cohen. We thank them for their invaluable contribution to the study. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The study was partially funded (i.e., salary for research assistants) by Neurotech Solutions, the publishers of the MOXO-d-CPT. In addition, Neurotech Solutions permitted the researchers to use the MOXO-d-CPT free of charge for the duration of the study and for the purpose of the described study.
© The Author(s) 2019.
- continuous performance tests (CPT)
- feigned cognitive impairment