J Korean Acad Child Adolesc Psychiatry.  2025 Jan;36(1):26-35. 10.5765/jkacap.240025.

Neurocognitive Profiles of Early Adulthood Attention-Deficit/ Hyperactivity Disorder

• So H
• Hong SB

• KMID: 2564107
• DOI: http://doi.org/10.5765/jkacap.240025

Abstract

Objectives
This study examined the neurocognitive profiles of early adulthood attention-deficit/hyperactivity disorder (ADHD) patients using the Korean version of the Wechsler Adult Intelligence Scale, 4th Edition (K-WAIS-IV) and Continuous Performance Test 3rd Edition (CPT-3) assessment results.
Methods
A total of 105 individuals underwent the K-WAIS-IV assessment, and 68 participants completed the CPT-3. We examined the differences between intelligence subindex scores using paired t-tests and applied Pearson’s correlation analysis to determine the correlation between the K-WAIS-IV and CPT-3 scores.
Results
Working Memory Index scores were significantly lower than Verbal Comprehension Index scores, whereas Processing Speed Index (PSI) scores were significantly lower than all three other subindex scores. Significant negative correlations were found between all four K-WAIS-IV subindex scores and the CPT-3 scores for Detectability, Omissions, Commissions, Perseverations, Hit Reaction Time, Hit Reaction Time Standard Deviation, and Variability.
Conclusion
The PSI of the K-WAIS-IV can be considered a useful predictor in early adulthood ADHD patients combined with the CPT-3 examination.

Keyword

Attention-deficit/hyperactivity disorder; Neurocognitive tests; Wechsler Intelligence Scales; Continuous Performance Task; Working memory; Processing speed