abstract Internet stock trading is a technological service innovation that is rapidly revolutionizing the financial services sector. This study investigated the factors influencing the behavioural intention to adopt Internet stock trading in Malaysia using the Integrated Decomposed Theory of Planned Behaviour (IDTPB) model. The study also compared the explanatory power of other intention-based models, specifically the technology acceptance model (TAM), the Theory of Planned Behaviour (TPB), the Decomposed Theory of Planned Behaviour and the Integrated Theory of Planned Behaviour with the IDTPB model. Data analysis on a sample consisting of 144 respondents indicated that the IDTPB model has better explanatory power than the other considered models. In addition, results suggest that, despite the importance of facilitating conditions and social norms, as indicated by the Diffusion of Innovations Theory, qualities of a technological innovation remain a constant determinant of successful innovation adoption. © 2014 © 2014 Korean Society for Innovation Management and Economics (KOSIME).
keywords behavioural intention model; diffusion of innovation; internet stock trading; malaysia; model comparison