Investigated the operation of 2 laws of sympathetic magic in 50 American adults (aged 17–50 yrs) using both measurements in the laboratory and questionnaire response. The 1st law, contagion, holds that "once in contact, always in contact." That is, there can be a permanent transfer of properties from one object (usually animate) to another by brief contact. The 2nd law, similarity, holds that "the image equals the object" and that action taken on an object affects similar objects. It was shown that drinks that had briefly contacted a sterilized, dead cockroach become undesirable and that laundered shirts previously worn by a disliked person were less desirable than those previously worn by a liked or neutral person. The law of similarity was demonstrated by showing that Ss rejected acceptable foods shaped into a form that represents a disgusting object and that Ss were less accurate at throwing darts at pictures of the faces of people they like. Evidence was found for the operation of the laws of sympathetic magic in all Ss studied. The laws of sympathetic magic correspond to the 2 basic laws of association (contiguity and similarity). The parallel is discussed, and a disgust-conditioning study to develop this parallel is reported. (29 ref) (PsycINFO Database Record (c) 2012 APA, all rights reserved)