The WISC-III Freedom from Distractibility Index in Children with Attention Deficit Hyperactivity Disorder (ADHD).

  • hattakorn samretdee ภาควิชาจิตเวชศาสตร์ คณะแพทยศาสตร์ ม.ขอนแก่น



Object: The objective of this study was to test the mean of the Freedom from distractibility Index (FDI) of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) in ADHD.

Method: Cross-sectional study by reviewing the psychological test report in Srinagarind Hospital, Faculty of Medicine, Khon Kaen University dating back from January 1, 2013 to July 30, 2020, of 125 patients aged 6 - 16 years who were diagnosed by a psychiatrist according to the DSM-5 criteria and their intelligence quotient was assessed by a clinical psychologist using the WISC-III Thai version. The mean was tested using the One sample t-test statistic and tested the hypothesis with the Freedom from distractibility Index (FDI) between 90 and 109 points.

Results: The mean FDI score ranged from 90 - 109 points, which was statistically significant. (p-value <0.0001)

Conclusion: The FDI score for ADHD was average, but it was the lowest when compared with the intelligence quotient and other indexes of ability.

Keywords:  FDI, WISC-III, ADHD


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1. Chaiudomsom K, Paholpak P, Vadhanavikkit P, Paholpak P. Psychiatry. Khon kaen: Klungnana Vitthaya Press; 2559.
2. Association AP. Diagnostic and statistical manual of mental disorders (DSM-5®). American Psychiatric Pub; 2013.
3. Rajanukul Institute Department of Mental Health Ministry of Public Health. Teacher Manual: Student Care System for Special Children with Learning Disabilities. Bangkok: Beyond Publishing Company Limited; 2555. 9 p.
4. Apinuntavech S. Treating ADHD with medications And psychosocial therapy in Thailand. Siriraj Med Bull. 2019;9(3):175–81.
5. Dangnumkoo D. Parenting stress in caretakers of children with ADHD. Chulalongkorn University; 2006.
6. Vitola ES, Bau CHD, Salum GA, Horta BL, Quevedo L, Barros FC, et al. Exploring DSM-5 ADHD criteria beyond young adulthood: phenomenology, psychometric properties and prevalence in a large three-decade birth cohort. Psychol Med. 2017;47(4):744.
7. Voort JL Vande, He J-P, Jameson ND, Merikangas KR. Impact of the DSM-5 attention-deficit/hyperactivity disorder age-of-onset criterion in the US adolescent population. J Am Acad Child Adolesc Psychiatry. 2014;53(7):736–44.
8. Aboul-ata MA, Amin FA. The prevalence of ADHD in Fayoum City (Egypt) among school-age children: depending on a DSM-5-based rating scale. J Atten Disord. 2018;22(2):127–33.
9. Matte B, Anselmi L, Salum GA, Kieling C, Gonçalves H, Menezes A, et al. ADHD in DSM-5: a field trial in a large, representative sample of 18-to 19-year-old adults. Psychol Med. 2015;45(2):361–73.
10. Visanuyothin T, Pavasuthipaisit C, Wachiradilok P, Arunruang P, Buranasuksakul T. The prevalence of attention deficit/hyperactivity disorder in Thailand. J Ment Heal Thail. 2013;21(2):66–75.
11. Boon-yasidhi V. Attention Deficit Hyperactivity Disorder: Diagnosis and Management. J Psychiatr Assoc Thail. 2012;57(4):379.
12. Thongthammarat Y. The Study of Intelligence Quotient of the 6-16 years olds Children with ADHD Tested with WISC-III [Internet]. 2552. Available from:
13. Schwean VL, Saklofske DH. 5 - Wisc-III Assessment of Children with Attention Deficit/Hyperactivity Disorder. In: Prifitera A, Saklofske DHBT-W-ICU and I, editors. Practical Resources for the Mental Health Professional [Internet]. San Diego: Academic Press; 1998. p. 91–118. Available from:
14. Dickerson Mayes S, Calhoun SL, Crowell EW. WISC-III freedom from distractibility as a measure of attention in children with and without attention deficit hyperactivity disorder. J Atten Disord. 1998;2(4):217–27.
15. Krane E, Tannock R. WISC-III third factor indexes learning problems but not Attention Deficit/Hyperactivity Disorder. J Atten Disord [Internet]. 2001 Sep 1;5(2):69–78. Available from:
16. Mayes SD, Calhoun SL. WISC-IV and WISC-III profiles in children with ADHD. J Atten Disord. 2006;9(3):486–93.
17. Daniel WW, Cross CL. Biostatistics: a foundation for analysis in the health sciences. Wiley; 2018. 190 p.
18. Thawong S. The Developmental of the Short Form of Wechsler Intelligence Scale for Children - Third Edition for Children suspected to Attention Deficit and Hyperactive Disorders. Chang Mai Rajabhat University; 2553.
19. Flynn JR. What is intelligence?: Beyond the Flynn effect. Cambridge University Press; 2007.
20. Antshel KM, Faraone S V, Stallone K, Nave A, Kaufmann FA, Doyle A, et al. Is attention deficit hyperactivity disorder a valid diagnosis in the presence of high IQ? Results from the MGH Longitudinal Family Studies of ADHD. J Child Psychol Psychiatry. 2007;48(7):687–94.
21. Healey D, Rucklidge JJ. An investigation into the relationship among ADHD symptomatology, creativity, and neuropsychological functioning in children. Child Neuropsychol. 2006;12(6):421–38.
22. Mahone EM, Hagelthorn KM, Cutting LE, Schuerholz LJ, Pelletier SF, Rawlins C, et al. Effects of IQ on executive function measures in children with ADHD. Child Neuropsychol. 2002;8(1):52–65.
23. Walg M, Hapfelmeier G, El-Wahsch D, Prior H. The faster internal clock in ADHD is related to lower processing speed: WISC-IV profile analyses and time estimation tasks facilitate the distinction between real ADHD and pseudo-ADHD. Eur Child Adolesc Psychiatry. 2017;26(10):1177–86.
24. Kramer E, Koo B, Restrepo A, Koyama M, Neuhaus R, Pugh K, et al. Diagnostic Associations of processing Speed in a transdiagnostic, pediatric Sample. Sci Rep. 2020;10(1):1–11.
How to Cite
samretdee, hattakorn. (2021). The WISC-III Freedom from Distractibility Index in Children with Attention Deficit Hyperactivity Disorder (ADHD). ournal of the sychiatric ssociation of hailand, 66(1), 15-24. etrieved from