B – 132 Reynolds Interference Task Correlated to the WISC-V: Is it a Measure of Speed and Reasoning?

Abstract Objective The Reynolds Interference Test (RIT) utilizes a Stroop paradigm intended to measure complex processing speed and executive functioning. It has been correlated with subtests on the WISC-IV; however, it has not been correlated with indices of related cognitive abilities on the WISC-5 (Reynolds & Kamphaus, 2017). The purpose of this study is to evaluate the presence of correlation between the RIT and the Processing Speed Index (PSI) and/or Fluid Reasoning Index (FRI) on the WISC-5, which are deemed related neurocognitive constructs (complex speed and higher cognitive functioning domains). Method Data was obtained through a neuropsychological archive from outpatient neuropsychology clinics in Louisville, Kentucky, between 2022-2024. After a record review, 46 patients were included in the study. Inclusionary requirements were individuals 6-15 years old who received a full WISC-5 and the RIT. Exclusionary requirements were those outside of those age ranges and who were not administered those tests. Results A Pearson R correlation was utilized to determine the correlation between RIT and the PSI and/or FRI intelligence indices. The model demonstrated that the RIT was positively correlated with the PSI (r (46) = 0.62, p = <.001) with a 95% confidence interval (0.77 to 0.40) and was not correlated with FRI (r (46) = 0.195, p = 0.195). Conclusion These results demonstrated a positive correlation between the RIT total score and the PSI and no correlation with FRI. Findings results suggest that the RIT may better assess processing speed rather than its intended use of understanding executive/higher cognitive functioning.