“…Each item is rated on a 5-point Likert-type scale, ranging from 0 (always) to 4 (never). Growing literature suggests that the TDI has strong psychometric properties in both clinical and nonclinical samples, including an excellent Person Separation Index, no evidence of bias due to item-trait interaction, good discriminant and convergent validity, and control of major response sets (Balsamo, Carlucci, Sergi, Murdock, & Saggino, 2015;Balsamo, Innamorati, Van Dam, Carlucci, & Saggino, 2015;Innamorati et al, 2013). In the present sample, Cronbach's alpha was .91.…”