Correction: On 20/08/2014 the spelling of the third author was changed from Bijan Keykhah DehdeziTO Bijan Keikhaeidehdezi.Correction: On 20/08/2014 the affiliation of the first author was changed fromMusculoskeletal Rehabilitation Research Center, Jundishapur University of Medical Sciences of Ahvaz, IranTO Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran Abstract:Background: psychometric properties of a 9-item self-appraisal scale for studying self-efficacy in sickle cell disease was evaluated in order to survey people’s comprehension of their capabilities to be engaged in functional activities of daily living who were suffering from sickle cell disease and in order to manage syndromes.Methods: the participants of this study were aged between 11-19 years with sickle cell disease under treatment for at least one year.Result: reliability analysis showed the internal consistency and correlation coefficient of the scale to be acceptable values. Construct validity analysis showed moderate positive correlation between the scores obtained using Sickle Cell Self-Efficacy Scale and those obtained using Mental Components Scale of SF36. There is a weak correlation between the score obtained from SCSES and that of Physical Components Scale of SF36.Conclusion: this scale can be used in the future for future studies on self-efficacy and also to find the relationship between this component and other components.DOI: http://dx.doi.org/10.3126/ijls.v8i4.10931

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.

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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 sevenfactor 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 validand reliable instrument to assess function and disability among people with intellectual and developmental disability.