Decomposed Theory of Planned Behaviour (DTPB)
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Decomposed Theory of Planned Behaviour (DTPB)
The decomposed theory of planned behaviour is analyzed through two alternate efforts formulated by two various studies. Taylor and Todd (1995) contributed true evidence and following by Pavlong& Fygenson (2006) who contributed a further revised version. The theory of planned behaviour (DPB) is an improvement theory of reasoned action (RA) which was further extended by Taylor and Todd (1995a) by proposing decomposed TPD in to detailed components. The DTPB theory increases the theory of planned behaviour by adding elements from the diffusions of innovation (DOI) aspect.
Figure 7: Theory of Planned Behavior with belief decomposed
Source: Taylor & Todd (1995a)
Figure 7 (See above) depicts model that include measures of control belief and perceived behavioural control. While the model by Chau and Hu (2002) presented the facets impacting behavioural intention, it did not present a decomposed view of different behavioural beliefs and outcome evaluations.
It is observed that attitude is impacted by relative advantage, complexity of task and the degree of compatibility. Normative influences are found to impact subjective norms and efficacy and facilitating conditions are found to impact perceived behavioral control. It is to be noted that in the study by Taylor and Todd (1995a) only behavioral intention was studied and no direct impact on behaviour.
Taylor and Todd during the process of decomposition largely relied on past research which generated a persistent relationship among different innovative characteristics such as compatibility, complexity and relative benefits and the decision to adopt particularly when utilizing information technology (Moore and Benbasat, 1993, cited in Taylor & Todd, 1995a). Besides, the authors believe on decomposed TPB with one dimensional belief structures that they furnish better diagnostic value for managers and they provide suggestions on beliefs focussed to influence system utilization.