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It has been hypothesized that such analyses could serve as a clinical tool and that demand functions can be targeted predictors for the level of intervention necessary. This study evaluated the sensitivity of a demand task in 2 patient groups in a medication assisted treatment program (methadone maintenance), those who had used opioids in the last 2\u2009months and those who had not used opioids in at least 18\u2009months. Demand for 7 drugs and a control was assessed using hypothetical purchase tasks. Participants maintaining long\u2010term abstinence had significantly higher \u03b1 (sensitivity to price) and lower <jats:italic>Q<\/jats:italic><jats:sub><jats:italic>0<\/jats:italic><\/jats:sub> (intensity of demand) for heroin than participants who had recently used opioids. Further research is necessary to illustrate if treatment is responsible for this reduction in demand. If so, demand analyses may provide clinical utility as an aid for treatment planning or as a target for treatment.<\/jats:p>","DOI":"10.1002\/jeab.681","type":"journal-article","created":{"date-parts":[[2021,2,17]],"date-time":"2021-02-17T18:34:49Z","timestamp":1613586889000},"page":"717-728","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Purchase task sensitivity to drug and nondrug reinforcers in opioid\u2010agonist treatment patients"],"prefix":"10.1002","volume":"115","author":[{"given":"Lindsay P.","family":"Schwartz","sequence":"first","affiliation":[{"name":"Applied Behavioral Research Institutes for Behavior Resources  Baltimore MD"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alan","family":"Silberberg","sequence":"additional","affiliation":[{"name":"Department of Psychology American University  Washington DC"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven 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