Dispositional Greed Scale: evidences of its internal structure and item parameters

Abstract This study aimed to investigate the evidences of internal structure of the Dispositional Greed Scale (DGS) and to check the parameters of its items. Participants included 338 individuals with a mean age of 26.5 years old (SD = 8.18), who answered the DGS and demographic questions. Results supported the one-factorial solution of the DGS (Ω = 0.75), and the Item Response Theory analysis demonstrated that the items of the DGS discriminate participants properly and require low to moderate levels of latent trait to be endorsed. Furthermore, only one item displayed differential item functioning by sex, with low impact on item characteristic curves at overall test. In conclusion, the DGS shows evidences of its psychometric adequacy for use in future studies that aim to measure greed in Brazil.