Construct Validity and Item-Response Characteristics of the Satisfaction with Relationship Status Scale (ReSta)

The purpose of present study was to investigate psychometric properties of the Satisfaction with Relationship Status Scale (ReSta) among students. The research design was descriptive-correlational and, more specifically, validating the test. The study population comprised the students of a higher education institution in Mashhad during the 2018-2019 academic year. Regarding the number of variables, for the first phase of the study 160 students and for the second phase 223 students were selected using the multistage cluster sampling method. Data were collected using the Satisfaction with Relationship Status Scale (Lehmann et al., 2015), Ten-Item Personality Inventory (Gosling et al., 2003), Young schema questionnaire (Waller et al., 2001), Depression, Anxiety, Stress Scale (Lovibond & Lovibond, 1995), The satisfaction with life scale (Diener et al., 1985) and Kessler Psychological Distress Scale (Kessler et al, 2000). The results of the exploratory factor analysis showed that the scale has a one-factor structure with an explained variance of 61.67% and demonstrated good confirmatory validity. The Cronbach's alpha, split-half, and Guttmann coefficients were between 0.84 and 0.91. The positive correlation with personality traits implied a convergent validity, and the negative correlation with social isolation, depression, and psychological distress revealed the divergent validity of the scale. Gender and relationship satisfaction could predict life satisfaction. The Item-Response parameters of the scale were at a desirable level. Overall, the Satisfaction with Relationship Status Scale demonstrated acceptable validity and reliability and can thus be dependably used in studies of interpersonal relationships among students.