This research is based on the Theory of Planned Behaviour by Azjen. This theory is used to explain how our beliefs (i.e, thoughts and expectations) help to influence and shape our behavioural intentions (i.e., the behaviours that we choose to participate in).
The three key elements that drive intention and therefore, behaviour change are: Attitudes, Subjective Norms, and Perceived Behavioural Control.
Attitudes are your view of whether you see a behaviour as helpful (positive) or unhelpful (negative) in your life.
Subjective Norms is a belief about whether you feel pressured by influences close to you (friends, family, or society in general) to perform a particular behaviour.
Perceived Behavioural Control
Perceived Behavioural Control is your belief that you possess the skills/ability to successfully demonstrate any behaviour of interest whenever you want.