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The present study measured interoception in individuals with gambling disorder, using self\u2010report measures and a heartbeat counting task administered at rest. Resting state respiratory sinus arrhythmia (RSA), an index of heart rate variability, was measured as a proxy for parasympathetic control and emotional regulation capacity. In a case\u2010control design, 50 individuals with gambling disorder were compared against 35 controls without gambling problems. Participants completed two self\u2010report measures of bodily awareness and a behavioral test of heartbeat counting. A resting state electrocardiogram (5\u00a0min) was used to calculate RSA. There were no significant differences on the self\u2010report or behavioral interoception probes. The group with gambling disorder displayed significantly reduced RSA, which at face value is consistent with reduced parasympathetic control. However, the group difference in RSA did not survive controlling for age and smoking status, as established predictors of heart rate variability. Our findings do not support any changes in interoceptive processing in people with gambling disorder, at least under resting conditions. Our observation that group differences in RSA are partly explained by smoking behavior highlights the importance of controlling for nicotine use in future research characterizing physiological functioning and emotional regulation in disordered gambling.<\/jats:p>","DOI":"10.1111\/psyp.13333","type":"journal-article","created":{"date-parts":[[2019,1,21]],"date-time":"2019-01-21T09:49:40Z","timestamp":1548064180000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Interoception and respiratory sinus arrhythmia in gambling disorder"],"prefix":"10.1111","volume":"56","author":[{"given":"Dawn","family":"Kennedy","sequence":"first","affiliation":[{"name":"Department of Psychology, Centre for Gambling Research University of British Columbia Vancouver British Columbia Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caylee\u2010Britt","family":"Goshko","sequence":"additional","affiliation":[{"name":"Department of Psychology, Centre for Gambling Research University of British Columbia Vancouver British Columbia Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2780-3578","authenticated-orcid":false,"given":"W. 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