PurposeGiven the proliferation of mobile devices, m‐commerce is expected to experience a substantial growth. However, most m‐commerce applications except for a few have failed to meet expectations. In this study, the authors aim to examine specific factors pertaining to the individual adoption of B2C transactional mobile commerce.Design/methodology/approachA comprehensive framework integrating well established theories of technology adoption – i.e. the technology acceptance model (TAM) and the theory of planned behaviour (TPB) – is developed. More specifically, perceived usefulness is re‐conceptualized to enhance the specificity of these theories to mobile commerce. The resulting model is empirically tested with mobile device users who have not adopted mobile commerce yet.FindingsThe empirical results provide strong support for the integrative approach, shedding light on the significance and relative importance of specific technological characteristics. The theoretical and empirical implications of these results are discussed.Originality/valueThe paper demonstrates the need to develop the innovation diffusion theory and TAM further by including the effects of social influence and individual characteristic variables. Furthermore, the paper also shows the usefulness of accounting for the specificity of the IT artifact in general and m‐commerce applications in particular. In this study, the specificity of the IT artifact is accounted for by decomposing perceived usefulness into specific considerations that are relevant to m‐commerce adoption. Such an approach presents a major advantage. Indeed, the significance and magnitude of the formative measures show which characteristics of m‐commerce are adoption drivers.

, M. 2009, Knowledge contribution in virtual communities: accounting for multiple dimensions of social presence through social identity, Behaviour and Information Technology, vol.29, 4,

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Kathy Ning ShenAbu Dhabi University kathy.shen@adu.ac.ae Mohamed KhalifaUniversity of Wollongong in Dubai mohamedkhalifa@uowdubai.ac.aeThe design of online communities that promotes user participation is critical to the community's success in fostering new ideas and innovations, building knowledge competencies, and strengthening customer relations. Social presence has been considered as a major design principle and important concept in explaining the relationship between online community artifacts and online user behavior. While most prior IS research adopts a unidimensional conceptualization of social presence and focuses on its effects on user attitude and/or behavior, this research employs a multidimensional conceptualization and demonstrates its suitability for understanding the effects of online community artifacts on social presence. More specifically, this research examines the effects of three categories of design artifacts (artifacts supporting self-presentation, deep profiling, and virtual co-presence) on three social presence dimensions (awareness, affective social presence and cognitive social presence). To validate the research model, a survey was conducted with four online communities. Different social presence dimensions were found to carry different weights in forming the overall sense of social presence and the effects of perceived usage of various online community artifacts varied for different social presence dimensions.