Internal validity using Cronbach’s alpha = 0.87. Using a test-retest timeframe of 2 months, validity was r=0.82. Diener et al (1985) tested the SWLS against nine other subjective well-being scales returning an average correlation of r=0.57 in convergent validity across the 9 scales. The initial test phase of 48 items were tested on 176 University of Illinois students & then a second phase using a further 163 students was performed to test convergent validity between SWLS and other well-being measures. The only items remaining related to well-being and all items relating to affect were removed.ĭiener et al’s study had 3 phases. All items with loadings between 0.1 and 0.6 were removed. Most of the initial items were related to life satisfaction however some related to positive and negative affectīy means of factor analysis this was reduced to 5 items. An initial test phase of 48 items were tested on 176 University of Illinois students. The scale was developed in the USA by Diener, Emmons, Larsen & Griffin (1985). Life satisfaction refers to a cognitive judgement process it is a subjective self-assessment not an assessment made according to some externally imposed criteria by the researcher. It does not attempt to measure constructs such as positive affect or loneliness which measure specific domains. It is a narrowly focused measurement tool designed to assess global life satisfaction. SWLS measures overall satisfaction with a person’s life.
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