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  • Title: Psychometric properties of the Swedish version of the selection, optimization, compensation questionnaire.
    Author: Viglund K, Aléx L, Jonsén E, Lundman B, Norberg A, Fischer RS, Strandberg G, Nygren B.
    Journal: Scand J Caring Sci; 2013 Jun; 27(2):460-7. PubMed ID: 22671769.
    Abstract:
    BACKGROUND: The model of selection, optimization and compensation has been proposed as a model of adaptive management strategies throughout the lifespan. AIM: The aim of this study was to test the psychometric properties of a translated Swedish version of the 12-item selection, optimization, and compensation (SOC) questionnaire. METHOD: The 12-item SOC questionnaire is composed of four subscales: elective selection (ES), loss-based selection, optimization and compensation. A convenience sample of 122 Swedish-speaking people, aged 19-85, participated in a study of the validity and reliability of the SOC questionnaire. Cronbach's alpha coefficient, corrected item-total correlation and Cronbach's alpha if item deleted were used for reliability testing. Two other scales, the ways of coping questionnaire and Rosenberg's self-esteem scale, were used to test convergent validity, and the geriatric depression scale was used to test discriminant validity. Stability over time was evaluated using a test-retest model with a 2-week interval. RESULTS: The 12-item SOC questionnaire showed a Cronbach's alpha value of 0.50, and the subscales ranged from α = 0.16 to α = 0.64. Two items in the ES subscale had negative values on the corrected item-total correlation and showed substantial improvement (>0.05) in Cronbach's alpha when item deleted. When these two items that influenced internal consistency were deleted, Cronbach's alpha rose to 0.68. CONCLUSION: The Swedish version of the 12-item SOC questionnaire showed deficiencies in a test of internal consistency because of two items in the ES subscale, and these two items were deleted. A consequence of the reduction is a weakening of the ES subscale and thereby to some extent the SOC questionnaire in total. Further testing is advisable. However, the 10-item SOC questionnaire was acceptable in a test of validity and reliability.
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