title: Testing for behavioral contagion in a case-control design.
abstract: 'Behavioral contagion' refers to an increased tendency for a behavior to be performed when socially related persons have already performed it. So understood, behavioral contagion may be involved in criminality, conduct disorder, drug abuse, suicide, and teenage pregnancy. In a recent paper we showed that contagion, when present, generates highly distinctive result patterns in survey data. These patterns allow one to infer that contagion is present even though it has not been directly observed. The present paper extends this approach to case-control designs, where, it will be shown, contagion has equally distinctive but different consequences. The analysis is illustrated with a Canadian study of conduct disorder and further evidence is presented that this condition is contagious. Limitations of the approach and alternative interpretations of results are discussed.
authors.affiliation: Department of Behavioral Science, Pennsylvania State University College of Medicine, Hershey 17033.
authors.forename: M B
authors.initials: MB
authors.lastname: Jones
authors.forename: D R
authors.initials: DR
authors.lastname: Jones
mesh_terms: D000293:Adolescent; D000987:Antisocial Personality Disorder / Q000453:epidemiology / Q000523:psychology; D016022:Case-Control Studies; D002648:Child; D002653:Child Behavior Disorders / Q000453:epidemiology / Q000523:psychology; D002675:Child, Preschool; D016000:Cluster Analysis; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007604:Juvenile Delinquency / Q000523:psychology / Q000706:statistics & numerical data; D008297:Male; D008399:Mass Behavior; D009864:Ontario / Q000453:epidemiology; D012801:Sibling Relations; D012925:Social Conformity; D012931:Social Environment; D012932:Social Facilitation; D012940:Social Problems / Q000523:psychology*