How to measure self-esteem with one item? validation of the German single-item self-esteem scale (G-SISE)

The aim of the present study was to investigate whether the German version of the Single-Item Self-Esteem Scale (G-SISE) is an appropriate instrument to measure the global self-esteem level. In three studies, the construct validity of G-SISE was analyzed. Study 1 (N = 522) found support for the convergence between G-SISE and the German Rosenberg Self-Esteem Scale (G-RSE), which is mostly used to assess the global self-esteem level. In Study 2a (N = 989), the associations between G-SISE, "Big Five" traits, subjective happiness and social support were analyzed. Results of Study 2b (N = 348) established the test-retest reliability of G-SISE over the time course of nine months. Taken together, the results show that the G-SISE is a valid, reliable and economical instrument for measuring the global self-esteem. Possible practical applications and limitations of G-SISE are discussed.