Limitations of Technology acceptance model

        TAM also has a number of constraints and limitations. One major limitation is that the information from TAM about ease of use and usefulness tend to be a little too general, for example, providing insights like a system was easy to use without identifying other issues that enable system use  (Mathieson 1991, p. 187). Apart from the generality of TAM’s insights, Chuttur (2009, p. 16) argue that TAM uses self- reported data instead of examining actual data of system usage.      In addition, TAM does not incorporate any social variables, such as, age, gender and cultural factors (Mathieson 1991, p. 177). McCoy et al. (2007) and Straub et al. (1997) suggest that TAM may not apply uniformly to all people in different cultural contexts. Davis (1989, p. 334) acknowledged this weakness and realised that further research was required to shed more light on its finding. In order to address TAM limitations, this research had included the national and organisational culture dimensions as an extended TAM, along with additional factors which are not addressed adequately in previous work – such as type of organisation, race, religion, gender, location and age. The model in this study also has one item called Actual Usage to measure the actual volume of email received and sent rather than just behavioural intention to use email.