Gottschalk, J M The effects of establishing operations on preference assessment outcomes. [electronic resource] - Journal of applied behavior analysis 2000 - 85-8 p. digital Publication Type: Journal Article ISSN: 0021-8855 Standard No.: 10.1901/jaba.2000.33-85 doi Subjects--Topical Terms: Autistic Disorder--psychologyBehavior TherapyChildChoice BehaviorFemaleHumansIntellectual Disability--psychologyMaleMotivationToken Economy