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Although predominant food avoidance models assume fear of fat drives feeding behavior, disgust may be more theoretically and proximally relevant to moment\u2010to\u2010moment experiences of feeding. This study, therefore, aimed to examine affect and food avoidance using automated affect analysis from facial response by measuring time\u2010specific transitions in disgust during a laboratory eating paradigm. We hypothesized that phase transitions in disgust would distinguish temporally self\u2010initiated eating from food avoidance.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Sixty\u2010three adolescents with anorexia nervosa or another low\u2010weight eating disorder (LWED) and 27 age\u2010 and sex\u2010matched controls were recruited as part of a larger study; 45 patients and 22 controls provided data on autonomous eating and facial affect during a laboratory meal. Dynamic structural equation models quantified moment\u2010to\u2010moment relationships between disgust and feeding behavior.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Self\u2010initiated eating was associated with greater increases in disgust, but not fear, intensity among those with LWED relative to control participants and greater disgust intensity predicted lower likelihood of self\u2010initiated eating.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>Phasic transitions in disgust provide moment\u2010to\u2010moment evidence of affective influence on self\u2010initiated eating and lend credibility to the hypothesis that disgust contributes to food avoidance and initiation in individuals with LWED.<\/jats:p><\/jats:sec>","DOI":"10.1002\/eat.24254","type":"journal-article","created":{"date-parts":[[2024,7,3]],"date-time":"2024-07-03T13:15:59Z","timestamp":1720012559000},"page":"2088-2097","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Phase\u2010Transitions in Disgust During Self\u2010Initiated Eating Among Adolescents With Anorexia Nervosa and Related Low\u2010Weight Eating Disorders and Matched Controls"],"prefix":"10.1002","volume":"57","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7054-9590","authenticated-orcid":false,"given":"Tom","family":"Hildebrandt","sequence":"first","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Allison","family":"Boyar","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-1034-3654","authenticated-orcid":false,"given":"Xi","family":"Chen","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-8074-8392","authenticated-orcid":false,"given":"Katherine","family":"Holland","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elena","family":"Silverman","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-3921-5478","authenticated-orcid":false,"given":"Desiree","family":"Webb","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sophia","family":"Wolk","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kurt","family":"Schulz","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3381-986X","authenticated-orcid":false,"given":"Robyn","family":"Sysko","sequence":"additional","affiliation":[{"name":"Center of Excellence in Eating and Weight Disorders Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7,3]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11920-020-01217-5"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1080\/10705511.2017.1406803"},{"key":"e_1_2_10_4_1","unstructured":"Asparouhov T. andB. 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