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We compared the responses to validated self\u2010report measures of posttraumatic stress disorder (PTSD) and related constructs that were given by 822 participants recruited via MTurk and had experienced a <jats:italic>DSM\u20105<\/jats:italic> Criterion A traumatic event to responses obtained in recent samples of participants recruited via traditional methods. Results suggested that the rate of PTSD in the present sample (19.8%) was statistically higher than that found in a recent systematic review of studies that used only traditional recruitment methods. The severity of PTSD reported in the MTurk sample was significantly greater than that reported in a college sample, <jats:italic>d<\/jats:italic> = 0.24, and significantly less than that reported in a veteran sample, <jats:italic>d<\/jats:italic> = 0.90. The factor structure of PTSD found in the MTurk sample was consistent with prevailing models of PTSD. Findings indicate that crowdsourcing may improve access to this hard\u2010to\u2010reach population.<\/jats:p>","DOI":"10.1002\/jts.22303","type":"journal-article","created":{"date-parts":[[2018,7,19]],"date-time":"2018-07-19T16:45:40Z","timestamp":1532018740000},"page":"549-557","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":57,"title":["Crowdsourcing Trauma: Psychopathology in a Trauma\u2010Exposed Sample Recruited via Mechanical Turk"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5278-4551","authenticated-orcid":false,"given":"Katherine","family":"van Stolk\u2010Cooke","sequence":"first","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Brown","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Maheux","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justin","family":"Parent","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rex","family":"Forehand","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew","family":"Price","sequence":"additional","affiliation":[{"name":"Department of Psychology University of Vermont  Burlington Vermont USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,7,19]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpsychires.2014.10.012"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/mpr.1421"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/pan\/mpr057"},{"key":"e_1_2_5_6_1","first-page":"1","article-title":"Summary health statistics for US adults: National health interview survey, 2012","volume":"260","author":"Blackwell D. 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