J Korean Acad Child Adolesc Psychiatry.
2017 Jan;28(1):25-30. 10.5765/jkacap.2017.28.1.25.
Comparing Intelligence Test Profiles to Assess Tourette's Disorder with Attention-Deficit Hyperactivity Disorder
- Affiliations
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- 1Department of Psychiatry, Chonbuk National University Medical School, Jeonju, Korea. ptaewon@jbnu.ac.kr
- 2Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea.
- 3Seoul National University College of Medicine, Seoul, Korea.
- 4Department of Psychiatry, Chonbuk National University Hospital, Jeonju, Korea.
- 5Department of Statistics, Chonbuk National University, Jeonju, Korea.
- KMID: 2369529
- DOI: http://doi.org/10.5765/jkacap.2017.28.1.25
Abstract
OBJECTIVES
The study compared the intelligence test profiles of Tourette's Disorder (TD), attention-deficit hyperactivity disorder (ADHD), and TD with ADHD (TD+ADHD) groups.
METHODS
The Korean Wechsler Intelligence Scale for Children-third edition (K-WISC-III) and Korean Wechsler Intelligence Scale for Children-fourth edition (K-WISC-IV) were administered to 13 children and adolescents with TD, 17 children and adolescents with ADHD, and 15 children and adolescents with TD+ADHD. Each parameter was compared among the groups using the Kruskal-Wallis test.
RESULTS
The mean scores of the freedom from distractibility/working memory index (FD/WMI) and the digit span and arithmetic subtests of the TD+ADHD group were significantly lower than those of the TD group.
CONCLUSION
According to the intelligence test results, the comorbid ADHD+TD group showed a significant decrease in working memory compared to the TD group. These findings are similar to those of previous research on cognitive functions and suggest that the TD+ADHD comorbid and TD alone groups exhibit different endophenotypes. The results also imply that WISC-III and WISC-IV, the most commonly used intelligence tests clinically, are effective in evaluating cognitive functions such as attention. Further research is required to confirm these results.
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