Vries (2006) and colleagues adopted the theory of planned behavior as part of the framework for the intervention [6]. The
theory of planned behavior states that an individual’s intentions are the most important factor in determining behavior.
Ajzen’s (2005) theory of planned behavior (TPB) is an extension of Ajzen and Fishbein’s (1980) earlier theory of reasoned action (TRA) [22]. TPB provides a framework for understanding people’s behavior and its psychological determinants.
Attitudes towards a behavior, subjective norms with respect to the behavior, and perceived control over the behavior are
usually found to predict intentions and can serve as a weak point for attack in attempts to modify the behavior [22]. The
level of belief must be examined in order to learn about the unique factors that influence one person to engage in a
behavior and to prompt another to follow a different course of action