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Turkish validity and reliability study of the Weiss Functional Impairment Rating Scale-Parent Report

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ADHD Attention Deficit and Hyperactivity Disorders


Attention deficit hyperactivity disorder (ADHD) is seen frequently in childhood and leads to marked impairment in functioning. There is no scale in Turkey with documented validity and reliability that assesses ADHD-specific functional impairment (FI). This study aimed at adapting the Weiss Functional Impairment Rating Scale-Parent Report (WFIRS-P), which assesses ADHD-related FI, for use in Turkey, and examining psychometric aspects of the scale. The study included 250 children diagnosed with ADHD and 250 healthy children and their parents. Internal consistency and test–retest methods were used to test the reliability of the scale. Validity was tested with exploratory and confirmatory factor analyses and convergent and discriminant validity analyses. Since all six questions of the WFIRS-P were scored 0, analyses were conducted for the original scale questionnaire consisting of 50 items and the questionnaire consisting of 44 items where the six questions scored 0 were not included. The Cronbach’s alpha coefficient was 0.93 for the whole scale. The Spearman’s correlation coefficient was 0.93 for test–retest reliability. The exploratory factor analysis run on the 44-item questionnaire showed that the scale items were best represented in a 7-factor structure, but some items were placed in different subdomains than those of the original scale. In the confirmatory factor analysis, the root mean square error of approximation was 0.061, and the comparative fit index was 0.95 for the whole model. Therefore, the Turkish WFIRS-P is valid and reliable in testing functional impairment in children with ADHD.

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  • American Psychiatric Association (2013) Diagnostic and statistical manual of mental disorders, 5th edn. American Psychiatric Association, Washington

    Book  Google Scholar 

  • Barkley RA, Fischer M, Fletcher K et al (2002) Persistence of attention deficit hyperactivity disorder into adulthood as a function of reporting source and definition of disorder. J Abnorm Psychol 111:279–289

    Article  PubMed  Google Scholar 

  • Çakın Memik N, Ağaoğlu B, Coşkun A, Üneri ÖŞ, Karakaya I (2007) The validity and reliability of the Turkish Pediatric Quality of Life Inventory for children 13-18 years old. Turk Psikiyatri Derg 18(4):353–363

    PubMed  Google Scholar 

  • Çakın Memik N, Ağaoğlu B, Coşkun A, Karakaya I (2008) The validity and reliability of Pediatric Quality Of Life Inventory in 8–12 year old Turkish children. Turk J Child Adolesc Ment Health 5(2):87–98

    Google Scholar 

  • Canadian Attention Deficit Hyperactivity Disorder Resource Alliance (CADDRA) (2011) Canadian ADHD Practice Guidelines, 3rd edn. CADDRA, Toronto

  • Coghill D (2011) Pragmatic measures in paediatric psychopharmacology-are we getting it right?. Eur Neuropsychopharmacol 21(8):571–583

    Article  CAS  PubMed  Google Scholar 

  • Cohen J (1988) Statistical power analysis for the behavioral sciences, 2nd edn. Erlbaum, Hillsdale

    Google Scholar 

  • Danckaerts M, Sonuga-Barke EJS, Banaschewski T et al (2010) The quality of life of children with attention deficit/hyperactivity disorder: a systematic review. Eur Child Adolesc Psychiatry 19(2):83–105

    Article  PubMed Central  PubMed  Google Scholar 

  • Dereboy Ç, Şenol S, Şener Ş, Dereboy F (2007) Validation of the Turkish versions of the short-form Conners Teacher and Parent Rating Scales. Turk Psikiyatri Derg 18(1):48–58

    PubMed  Google Scholar 

  • DeVellis RF (2003) Scale development: theory and applications, 2nd edn. Sage, Thousand Oaks

    Google Scholar 

  • Ercan ES, Amado S, Somer O et al (2001) Development of a test battery for the assessment of attention deficit hyperactivity disorder. Turk J Child Adolesc Ment Health 8:132–144

    Google Scholar 

  • Gökler B, Ünal F, Pehlivantürk B (2004) Reliability and validity of schedule for affective disorders and schizophrenia for school age children-present and lifetime version-turkish version (K-SADS-PL-T). Turk J Child Adolesc Ment Health 11:109–116

    Google Scholar 

  • Goldman LS, Genel M, Bezman RJ et al (1998) Diagnosis and treatment of attention-deficit/hyperactivity disorder in children and adolescents. JAMA 279:1100–1107

    Article  CAS  PubMed  Google Scholar 

  • Goyette CH, Conners CK, Ulrich RF (1978) Normative data on revised Conners Parent and Teacher Rating Scales. J Abnorm Child Psychol 6(2):221–236

    Article  CAS  PubMed  Google Scholar 

  • Guy E (1976) Asessment manual for psychopharmacology. National Institute of Mental Health, Rockville

    Google Scholar 

  • Haack LM, Gerdes AC (2011) Functional impairment in Latino children with ADHD: implications for culturally appropriate conceptualization and measurement. Clin Child Fam Psychol Rev 14(3):318–328

    Article  PubMed  Google Scholar 

  • Hantson J, Wang PP, Grizenko-Vida M, Ter-Stepanian M, Harvey W, Joober R et al (2012) Effectiveness of a therapeutic summer camp for children with ADHD: phase I clinical intervention trial. J Atten Disord 16(7):610–617

    Article  PubMed  Google Scholar 

  • Kaufman J, Birmaher B, Brent D et al. (1996) Kiddie-SADS-Present and Lifetime Version (K-SADS-PL), version 1.0 of October 1996 edn. University of Pittsburgh School of Medicine, Department of Psychiatry, Pittsburgh

  • Klassen AF, Miller A, Fine S (2004) Health-related quality of life in children and adolescents who have a diagnosis of attention deficit/hyperactivity disorder. Pediatrics 114:e541–e547

    Article  PubMed  Google Scholar 

  • Matza LS, Rentz AM, Secnik K et al (2004) The link between health-related quality of life and clinical symptoms among children with attention-deficit hyperactivity disorder. J Dev Behav Pediatr 25:166–174

    Article  PubMed  Google Scholar 

  • Maziade M, Rouleau N, Lee B, Rogers A, Davis L, Dickson R (2009) Atomoxetine and neuropsychological function in children with attention-deficit/hyperactivity disorder: results of a pilot study. J Child Adolesc Psychopharmacol 19(6):709–718

    Article  PubMed  Google Scholar 

  • Netemeyer RG, Bearden WO, Sharma S (2003) Scaling procedures: issue and applications. Sage, California

    Google Scholar 

  • Pastor PN, Reuben CA (2008) Diagnosed attention deficit hyperactivity disorder and learning disability: United States, 2004-2006. Vital Health Stat 10(237):1–14

    Google Scholar 

  • Schumacker RE, Lomax RG (2004) A beginner’s guide to structural equation modeling, 2nd edn. Lawrence Erlbaum Associates, London, pp 79–122

    Google Scholar 

  • Shaffer D, Gould MS, Brasic J et al (1983) A children’s global assessment scale (CGAS). Arch Gen Psychiatry 40(11):1228–1231

    Article  CAS  PubMed  Google Scholar 

  • Stein MA, Waldman ID, Charney E, Aryal S, Sable C, Gruber R et al (2011) Dose effects and comparative effectiveness of extended release dexmethylphenidate and mixed amphetamine salts. J Child Adolesc Psychopharmacol 21(6):581–588

    Article  PubMed Central  CAS  PubMed  Google Scholar 

  • Tavakol M, Dennick R (2011) Making sense of Cronbach’s alpha. Int J Med Educ 2:53–55

    Article  PubMed Central  Google Scholar 

  • Turgay A (1997) Turgay’s DSM-IV based ADHD and disruptive behaviour disorders screening scale. Integrative Therapy Institute Publication, Toronto

    Google Scholar 

  • Tyrer P, Methuen C (2007) Rating Scales in Psychiatry. RCPsych, London

    Google Scholar 

  • Uneri OS, Agaoglu B, Coskun A, Memik NC (2008) Validity and reliability of pediatric quality of life inventory for 2- to 4-year-old and 5- to 7-year-old Turkish children. Qual Life Res 17(2):307–315

    Article  PubMed  Google Scholar 

  • Varni JW, Burwinkle TM (2006) The PedsQL as a patient-reported outcome in children and adolescents with attention-deficit/hyperactivity disorder: a population-based study. Health Qual Life Outcomes 4:26

    Article  PubMed Central  PubMed  Google Scholar 

  • Varni JW, Seid M, Kurtin PS (2001) The PedsQL 4.0: reliability and validity of the Pediatric Quality of Life Inventory version 4.0 generic core scales in healthy and patient populations. Med Care 39:800–812

    Article  CAS  PubMed  Google Scholar 

  • Weiss MD, Brooks BL, Iverson GL et al (2007) Reliability and validity of the Weiss functional impairment rating scale. World Psychiatry Association Conference, Shanghai

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Correspondence to Mahmut C. Tarakçıoğlu.

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Tarakçıoğlu, M.C., Çakın Memik, N., Olgun, N.N. et al. Turkish validity and reliability study of the Weiss Functional Impairment Rating Scale-Parent Report. ADHD Atten Def Hyp Disord 7, 129–139 (2015).

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