1999
DOI: 10.1348/014466699164121
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Interaction effects in the theory of planned behaviour: Studying cannabis use

Abstract: This study employed the theory of planned behaviour (TPB) to investigate the factors underlying intentions and frequency of use of cannabis over a three-month period in a population of students (N = 249). In addition, several hypotheses in relation to the TPB were investigated. The TPB provided good predictions of both intentions (R2 = 0.653; attitude, injunctive norms and perceived behavioural control significant) and behaviour (R2 = 0.711; intentions significant). Other norm measures (descriptive and moral n… Show more

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Cited by 294 publications
(273 citation statements)
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References 62 publications
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“…Research done by Conner and McMillan (1999) and Armitage and Conner (Hewstone et al 2007) show a correlation of 0.70 and 0.68 between attitude and intention. Conner and McMillan (1999) found a correlation of 0.55 between subjective norm and intention. According to Ajzen (1991) and Ajzen and Manstead (Bos et al 2007) self-efficacy has the strongest impact on intention.…”
Section: Theoretical Frameworkmentioning
confidence: 95%
“…Research done by Conner and McMillan (1999) and Armitage and Conner (Hewstone et al 2007) show a correlation of 0.70 and 0.68 between attitude and intention. Conner and McMillan (1999) found a correlation of 0.55 between subjective norm and intention. According to Ajzen (1991) and Ajzen and Manstead (Bos et al 2007) self-efficacy has the strongest impact on intention.…”
Section: Theoretical Frameworkmentioning
confidence: 95%
“…Conner and McMillan (1999) define self-identity as "the salient part of an actor's self which relates to a particular behavior" (p. 200).…”
Section: Self-identitymentioning
confidence: 99%
“…Whereas descriptive norms reflect beliefs about the behavior of others, injunctive norms reflect beliefs about the degree to which others approve/disapprove of a particular behavior (Baer et al, 1991;Cialdini et al, 1991;Larimer et al, 2004). Research shows that both descriptive and injunctive norms independently predict alcohol outcomes (Borsari & Carey, 2003;Neighbors et al, 2007) and other substance use (e.g., stimulants; Silvestri & Correia, 2016), including marijuana use (Connor & McMillan, 2010;Napper et al, 2016;Neighbors et al, 2008).…”
mentioning
confidence: 99%