“…In our view, a self-report measure of mentalizing should first and foremost cover a core definition of the construct as, for example, provided by Fonagy et al (2016, p. 1), where mentalizing is described as "the capacity to interpret both the self and others in terms of internal mental states, such as feelings, wishes, goals, desires, and attitudes." A shared feature of existing mentalizing questionnaires (see Supplemental Table S1 for an interpretation of the item content from the authors' point of view), however, is that their item content might conflate the given definition with assumed psychopathological consequences of mentalizing impairments such as problems in interpersonal relationships, impulsive behavior, or emotion dysregulation (e.g., Bo et al, 2017;Müller et al, 2021). This issue impedes investigating the associations between mentalizing and psychopathology because correlation coefficients may be inflated merely due to shared item content.…”