The assignment explores the relevance of psychological theories in health and social care settings, highlighting their importance in evaluating individual behavior and actions across different life stages. It also examines how these theories can be applied to diagnose mental health disorders, identify behavioral disturbances, and assess psychic health. The assignment provides examples from real-life scenarios, including a case study of an 8-year-old child experiencing stress due to a poor relationship with his father, and a service user who is dissatisfied with the care received at a medical institution. It concludes that psychological theories are essential in providing better healthcare by assessing psychic health and promoting positive thinking approaches.