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In psychology, the I-change model [1] [2] or the integrated model, for explaining motivational and behavioral change, derives from the Attitude – Social Influence – Self-Efficacy Model, integrates ideas of Ajzen's Theory of Planned Behavior, [3] Bandura's Social Cognitive Theory, Prochaska's Transtheoretical Model, [4] the Health Belief Model, [5] and Goal setting [6] theories.
Stages of change, according to the transtheoretical model. The transtheoretical model of behavior change is an integrative theory of therapy that assesses an individual's readiness to act on a new healthier behavior, and provides strategies, or processes of change to guide the individual. [1]
Each behavioural change theory or model focuses on different factors in attempting to explain behaviour change. Of the many that exist, the most prevalent are learning theories, social cognitive theory, theories of reasoned action and planned behaviour, transtheoretical model of behavior change, the health action process approach, and the BJ Fogg model of behavior change.
TPB covers people's volitional behavior that cannot be explained by TRA. An individual's behavioral intention cannot be the exclusive determinant of behavior where an individual's control over the behavior is incomplete. By adding "perceived behavioral control," TPB can explain the relationship between behavioral intention and actual behavior.
Theories regarding reasoned action state how attitudes shape and influence behavioral intention, which in term shape actions. The theory of reasoned action states that behavioral intention is dependent on attitudes surrounding that behavior and social norms. [18]
A positivistic approach to behavior research, TRA attempts to predict and explain one's intention of performing a certain behavior.The theory requires that behavior be clearly defined in terms of the four following concepts: Action (e.g. to go, get), Target (e.g. a mammogram), Context (e.g. at the breast screening center), and Time (e.g. in the 12 months). [7]
The reasoned action approach (RAA) is an integrative framework for the prediction (and change) of human social behavior.The reasoned action approach states that attitudes towards the behavior, perceived norms, and perceived behavioral control determine people's intentions, while people's intentions predict their behaviors.
Models that describe health behavior change can be distinguished in terms of the assumption whether they are continuum-based or stage-based. [7] A continuum (mediator) model claims that change is a continuous process that leads from lack of motivation via action readiness either to successful change or final disengagement.