"Generally speaking it appears that in order for a person to perform a given behavior one or more of the following must be true:

1. The person must have formed a strong positive intention (or made a commitment) to perform the behaviour

2. There are no environmental constraints that make it impossible to perform the behaviour

3. The person has the skills necessary to perform that behaviour

4. The person believes that the advantages (benefits, anticipated positive outcomes) of performing the behaviour outweigh the disadvantages (costs, anticipated negative outcomes)

5. The person perceives more social (normative) pressure to perform the behaviour than to not perform the behaviour

6. The person perceives that performance of the behaviour is more consistent than inconsistent with his or her self image, or that it's performance does not violate personal standards that activate negative self-actions

7. The persons emotional reaction to performing the behaviour is more positive than negative

8. The person perceives that he or she has the capabilities to perform the behaviour under a number of different circumstances"