Konuk, HızırKüçük, Burcu Aydın2025-07-062025-07-0620250306-30701759-6106https://doi.org/10.1177/03063070251346846https://hdl.handle.net/20.500.11779/2614The study aims to reveal both the direct and indirect association between Illegitimate Tasks and Self-Undermining behavior through Emotional Exhaustion, with a focus on the moderating role of Supervisor support. It also seeks to highlight the conditions under which Supervisor support provides positive organizational outcomes. A survey was applied to 978 white-collar participants working in SMEs in Turkey. The Job-Demand Resources framework served as the theoretical basis for the research. Results indicated that Illegitimate Tasks are associated with self-undermining, with emotional exhaustion partially mediating this relationship. Supervisor support was found to have a negative relationship with emotional exhaustion and self-undermining; however, its moderating role was positive rather than negative. Supervisor support increased the effect of illegitimate tasks on emotional exhaustion and self-undermining, contradicting the expected buffering effect. The study contributes to the literature by offering evidence on when supervisor support becomes dysfunctional for organizations.eninfo:eu-repo/semantics/closedAccessEmotional ExhautionIllegitimate TaskJ-D RSelf-UnderminingSupervisor SupportArticle10.1177/030630702513468462-s2.0-105007149319N/AQ3WOS:001499113700001