More than 800 (co-)authors participated in a large-scale cross-sectional survey on inappropriate attribution of authorship and the use of explicit authorship guidelines in psychological science (response rate 29.6%, predominantly from Europe and North America). Almost half of the respondents had been involved in a study where someone was added as an author who did not contribute substantially (gift authorship) at least a few times. Being involved in a study where someone was not listed as an author when they contributed substantially (...) (ghost authorship) was experienced considerably less frequently. In approximately half of the respondents’ research settings, the use of explicit authorship guidelines is actively encouraged, leading to more frequent discussion of authorship in earlier stages, as well as to the perception of authorship decisions as fairer. Encouraging the use of explicit authorship guidelines is a simple yet effective intervention. Importantly, the American Psychological Association’s (APA) authorship guidelines are considerably more lenient than the widely used criteria of the Committee on Publication Ethics and the International Committee of Medical Journal Editors. (shrink)