Simulation of a Dynamic Theory of Reasoned Action
Boster, Franklin J.
Shaw, Allison Z.
Carpenter, Christopher J.
Lindsey, Lisa L. Massi
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Background. The Theory of Reasoned Action (TRA) is invoked frequently when social science scholars examine messages, affect, cognition, and action. Nevertheless, the fact that the TRA is a cross-sectional model limits its utility as an explanatory mechanism for those who study relationships among these variables as they change over time. This essay addresses this limitation by developing three versions of a Dynamic Theory of Reasoned Action (DTRA). Method. Simulations were conducted to examine the properties of these varying DTRA models. The extent of autoregression was varied in these simulations, and the subsequent effects on the size and stability of the model parameters, the fit of the cross-sectional TRA, and the distributional properties of the variables that comprise the model were assessed. Results. Results indicate that in the absence of an external shock (such as a persuasive message), these models reach equilibrium, and that trials to equilibrium increase as the autoregression parameters increase. The TRA fits perfectly at equilibrium, but may fail when the system is not in equilibrium, even when the DTRA fits perfectly. Finally, although starting with seed distributions closely approximating normality, distributional properties depart decidedly from normality over trials.
The article of record as published may be found at http://dx.doi.org/10.1177/1046878114562930
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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