<P> As a general rule, the more favorable the attitude toward behavior and subjective norm, and the greater the perceived behavioral control, the stronger the person's intention to perform the behavior in question should be . Finally, given a sufficient degree of actual control over the behavior, people are expected to carry out their intentions when the opportunity arises . </P> <P> In its simplest form, behavioral intention for the theory of planned behavior can be expressed as the following mathematical function: </P> <Dl> <Dd> BI = (W_1) AB (Σ (b) (e)) + (W_2) SN (Σ (n) (m)) + (W_3) PBC (Σ (c) (p)) </Dd> </Dl> <Dd> BI = (W_1) AB (Σ (b) (e)) + (W_2) SN (Σ (n) (m)) + (W_3) PBC (Σ (c) (p)) </Dd>

Which of the following is a key element in the theory of planned behavior