Cross-Cultural Adaptation and Evaluation of Psychometric Properties of Persian Version of Supports Intensity Scale among Adults with Intellectual and Developmental Disabilities

Sajed Salehi, Sheyda Javadipour, Gholamhossein Nassadj, Mohammad Hossein Haghighi, Shiva Saboor, Kamal Shakhi

Abstract


Purpose: This study was designed to translate and assess the psychometric properties of Supports Intensity Scale among adults with intellectual and developmental disability in Ahvaz and Tehran, Iran.

Method: The cross-sectional study was carried out in two stages.  The first stage consisted of the forward-backward translation of Supports Intensity Scale - Adult Version) SIS-A(. In the second stage, 197 people with intellectual and developmental disabilities were recruited in order to assess the internal consistency and test-retest reliability, concurrent and content validity of SIS-A. The confirmatory factor analysis (CFA) was performed to approve the seven-factor model of the instrument.

Results: The intra-class correlation coefficient values varied between 0.85 and 0.99 (very good to excellent). All subscales of the SIS-A showed Cronbach’s alpha above 0.70. Correlation coefficient between SIS-A and Barthel index was about -0.65, which shows excellent concurrent validity of SIS-A. The findings showed SIS-A had high ability to discriminate between groups with different IQ (p<0.05). There was no significant correlation between SIS-A and the age of participants (p>0.05). The result of CFA confirmed that the seven-factor model of SIS-A is the fittest pattern for SIS-A.

Conclusion: The results indicated that the Persian version of SIS-A is a valid and reliable instrument to assess function and disability among people with intellectual and developmental disability.


Keywords


Intellectual and developmental disability; SIS-A; Barthel

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References


American Association on Intellectual and Developmental Disabilities (AAIDD) [Online]. Benefits of the Supports Intensity Scale. Available at: https://aaidd.org/sis/product-information/benefits

American Association on Intellectual and Developmental Disabilities (2014) [Online]. James R Thompson. Available at: http://aaidd.org/docs/default-source/about-aaidd/january-2014.pdf?sfvrsn=0.

Bennett SJ, Oldridge NB, Eckert GJ, Embree JL, Browning S, Hou N, Deer M, Murray MD (2002). Discriminant properties of commonly used quality of life measures in heart failure. Quality of Life Research; 11(4): 349-59. https://doi.org/10.1023/A:1015547713061

Bullinger M, Alonso J, Apolone G, Leplège A, Sullivan M, Wood-Dauphinee S, Gandek B, Wagner A, Aaronson N, Bech P, Fukuhara S (1998). Translating health status questionnaires and evaluating their quality: The IQOLA project approach. Journal of Clinical Epidemiology; 51(11): 913-23. DOI: https://doi.org/10.1016/S0895-4356(98)00082-1

Buntinx W, Cobigo V, McLaughlin C, Morin D, Tasse M, Thompson JR (2008). Psychometric properties of the Supports Intensity Scale. AAIDD SIS White Paper Series. Jun: 40-9.

Buntinx W, Croce L, Ekstein Y, Giné C, Holmes S, Lamoureux-Hébert M, Leoni M, Morin D, Verdugo MA (2008). International implementation of the Supports Intensity Scale. AAIDD SIS white paper series. 1-14

Buntinx WH, Schalock RL (2010). Models of disability, quality of life, and individualised supports: Implications for professional practice in intellectual disability. Journal of Policy and Practice in Intellectual Disabilities; 7(4): 283-294. https://doi.org/10.1111/j.1741-1130.2010.00278.x

Chou YC, Lee YC, Chang SC, Yu AP (2013). Evaluating the supports intensity scale as a potential assessment instrument for resource allocation for persons with intellectual disability. Research in Developmental Disabilities; 34(6): 2056-63. https://doi: 10.1016/j.ridd.2013.03.013

Claes C, Van Hove G, Van Loon J, Vandevelde S, Schalock RL (2009). Evaluating the inter‐respondent (consumer vs. staff) reliability and construct validity (SIS vs. Vineland) of the Supports Intensity Scale on a Dutch sample. Journal of Intellectual Disability Research; 53(4): 329-338. https://doi.org/10.1111/j.1365-2788.2008.01149.x

Garin O, Ayuso-Mateos JL, Almansa J, Nieto M, Chatterji S, Vilagut G, Alonso J, Cieza A, Svetskova O, Burger H, Racca V (2010). Validation of the World Health Organization Disability Assessment Schedule, WHODAS-2 in patients with chronic diseases. Health and Quality of Life Outcomes; 8(1): 51. https://doi: 10.1186/1477-7525-8-51

Lamoureux-Hébert M, Morin D (2009). Translation and cultural adaptation of the Supports Intensity Scale in French. American Journal on Intellectual and Developmental Disabilities 114.1: 61-66. https://doi: 10.1352/2009.114:61-66

Luckasson R, Borthwick-Duffy S, Buntinx WHE, Coulter DL, Craig EMP, Reeve A (2002) Mental retardation: Definition, classification, and systems of supports. American Association on Mental Retardation; 208-212. Available at: https://opensiuc.lib.siu.edu/tpr/vol53/iss2/11

Morin D, Cobigo V (2009). Reliability of the supports intensity scale (French version). Intellectual and Developmental Disabilities; 47(1): 24-30. https://doi: 10.1352/2009.47:24-30

Negahban H, Fattahizadeh P, Ghasemzadeh R, Salehi R, Majdinasab N, Mazaheri M (2013). The Persian version of community integration questionnaire in persons with multiple sclerosis: Translation, reliability, validity, and factor analysis. Disability and Rehabilitation; 35(17): 1453-9. https://doi: 10.3109/09638288.2012.741653

Roos EM, Toksvig-Larsen S (2003). Knee injury and Osteoarthritis Outcome Score (KOOS) – validation and comparison to the WOMAC in total knee replacement. Health and Quality of Life Outcomes; 1(1): 17. https://doi.org/10.1186/1477-7525-1-64; https://doi.org/10.1186/1477-7525-1-17. PMid:12801417. PMCid:PMC161802

Schalock RL, Borthwick-Duffy SA, Bradley VJ, Buntinx W H, Coulter DL, Craig EM, Shogren KA (2010). Intellectual disability: Definition, classification, and systems of supports. American Association on Intellectual and Developmental Disabilities; 444 North Capitol Street NW Suite 846, Washington, DC 20001.

Silveira C, Parpinelli MA, Pacagnella RC, Camargo RS, Costa ML, Zanardi DM, Ferreira EC, Santos JP, Hanson L, Cecatti JG, Andreucci CB (2013). Cross-cultural adaptation of the World Health Organization Disability Assessment Schedule (WHODAS 2.0) into Portuguese abstract. Revista Da Associacao Medica Brasileira. 59(3): 234-40. https://doi.org/10.1016/j.ramb.2012.11.005

Smit W, Sabbe B, Prinzie P (2011). Reliability and validity of the Supports Intensity Scale (SIS) measured in adults with physical disabilities. Journal of Developmental and Physical Disabilities; 23(4): 277-287. https://doi.org/10.1007/s10882-011-9227-3

Tagharrobi Z, Sharifi K, Sooky Z (2011). Psychometric evaluation of Shah version of modified Barthel index in elderly people residing in Kashan Golabchi nursing home. KAUMS Journal (FEYZ); 15(3): 213-224. Available at: http://feyz.kaums.ac.ir/article-1-1241-en.pdf.

Thompson JR, McLaughlin C, Morin D, Tassé M (2008). The English version of the Supports Intensity Scale. Available at: http://aaidd.org/docs/default-source/sis-docs/siswppsychometric.pdf.

Thompson JR, Bryant B, Schalock R, Shogren K, Tassé M, Wehmeyer M (2014). Supports Intensity Scale: Users manual. Am J Ment Retardation; 113(3): 231-237. https://doi.org/10.1352/0895-8017(2008)113[231:IROTSI]2.0.CO;2

Thompson JR, Bryant B, Campbell EM, Craig EM, Hughes C, Rotholtz DA 2004. Support intensity scale. Supports Intensity Scale Users Manual. Washington, DC: American Association on Mental Retardation.

Verdugo MA, Arias B, Ibáñez A, Schalock RL (2010). Adaptation and psychometric properties of the Spanish version of the Supports Intensity Scale (SIS). American Journal on Intellectual and Developmental Disabilities; 115(6): 496-503. https://doi.org/10.1352/1944-7558-115.6.496

Verdugo MA, Guillén VM, Arias B, Vicente E, Badia M (2016). Confirmatory factor analysis of the supports intensity scale for children. Research in Developmental Disabilities; 49: 140-52. https://doi.org/10.1016/j.ridd.2015.11.022. PMid:26707926

Viriyangkura Y (2013). Understanding the support needs of people with intellectual and related developmental disabilities through cluster analysis and factor analysis of statewide data. Available at: https://core.ac.uk/download/pdf/48840796.pdf.

Watson SL, Hayes SA, Radford-Paz E (2011). Diagnose me please!: A review of research about the journey and initial impact of parents seeking a diagnosis of developmental disability for their child. International Review of Research in Developmental Disabilities; 41: 31-72. https://doi.org/10.1016/B978-0-12-386495-6.00002-3




DOI: https://doi.org/10.5463/dcid.v29i2.727



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