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In Study 1, we experimentally validated momentary assessment items ( N = 25). In Study 2, participants with generalized anxiety disorder ( N = 31) and controls ( N = 37) were prompted once per hour regarding their worry, thought valence, and arousal 10 times a day for 8 days. Higher worry duration, negative thought valence, and uncontrollable train of thoughts predicted feeling more keyed up concurrently and sustained anxious activation 1 hr later. More worry, feeling keyed up, and uncontrollable train of thoughts predicted lower likelihood of a negative emotional contrast in thought valence and higher likelihood of a positive emotional contrast in thought valence 1 hr later. Findings support the prospective ecological validity of CAM. Our findings suggest that naturalistic worry reduces the likelihood of a sharp increase in negative affect and does so by increasing and sustaining anxious activation.<\/jats:p>","DOI":"10.1177\/2167702619827019","type":"journal-article","created":{"date-parts":[[2019,3,1]],"date-time":"2019-03-01T16:49:44Z","timestamp":1551458984000},"page":"794-810","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":75,"title":["The Effects of Worry in Daily Life: An Ecological Momentary Assessment Study Supporting the Tenets of the Contrast Avoidance Model"],"prefix":"10.1177","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0873-1409","authenticated-orcid":false,"given":"Michelle G.","family":"Newman","sequence":"first","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicholas C.","family":"Jacobson","sequence":"additional","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"},{"name":"Massachusetts General Hospital, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nur Hani","family":"Zainal","sequence":"additional","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8826-7783","authenticated-orcid":false,"given":"Ki Eun","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lauren E.","family":"Szkodny","sequence":"additional","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"},{"name":"Dartmouth Hitchcock Medical Center, Lebanon, New Hampshire"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin J.","family":"Sliwinski","sequence":"additional","affiliation":[{"name":"Department of Psychology, The Pennsylvania State University"},{"name":"Department of Human Development and Family Studies, The Pennsylvania State University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2019,3]]},"reference":[{"key":"bibr1-2167702619827019","volume-title":"Diagnostic and statistical manual of mental disorders","author":"American Psychiatric Association","year":"1994","edition":"4"},{"key":"bibr2-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"key":"bibr3-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1016\/j.jagp.2014.05.003"},{"key":"bibr4-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1002\/da.20658"},{"key":"bibr5-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1016\/0005-7916(88)90006-7"},{"key":"bibr6-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1016\/j.jadohealth.2017.01.007"},{"key":"bibr7-2167702619827019","doi-asserted-by":"publisher","DOI":"10.1016\/j.jml.2012.11.001"},{"key":"bibr8-2167702619827019","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v067.i01"},{"key":"bibr9-2167702619827019","first-page":"77","volume-title":"Generalized anxiety disorder: Advances in research and practice","author":"Borkovec T. 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