Reliability and Validity of the Personal Social Capital Scale 16 and Personal Social Capital Scale 8: Two Short Instruments for Survey Studies

Abstract

Rapid developments in social capital and health research require short instruments for large-scale survey studies. The Personal Social Capital Scale (PSCS) is a theory-based and empirically tested instrument with reliability and validity established in the US and China, but it is too long for large-scale survey research. In this study, we described two short versions of the instrument: the PSCS-16 and PSCS-8. The two short scales were evaluated with survey data collected among an adult sample (N = 259) in China. The sample consisted of rural-to-urban migrants and non-migrant rural and urban residents. Cronbach’s alpha coefficients were .90 for the PSCS-18 and .83 for the PSCS-8. Both short instruments satisfactorily fit a two-factor model comprising the bonding capital and bridging capital subscales. The two short scales were highly correlated with the original PSCS (r = .95 for the PSCS-18 and .93 for the PSCS-8 respectively, p < .001 for both); significantly distinguished the migrant subsample from the two non-migrant subsamples; and significantly predicted social capital investment and stress level. In conclusion, the two short instruments PSCS-16 and PSCS-8 were reliable and valid, and can be used in large-scale survey studies to assess personally owned social capital. Further research is needed to replicate their reliability and validity in different cultural settings and to establish the test–retest reliability.