Name the four stages of Transtheoretical Model of Change (Prochaska & DiClemente, 1983; Prochaska, DiClemente, & Norcross, 1992). This theory is an integrative, biopsychosocial model to conceptualize the process of intentional behavior change. Precontemplation (not ready) 2. Contemplation (Getting Ready) 3. Preparation (Ready) 4. Action