Final answer:
Biomedical therapies involve medical interventions to alter brain chemistry for psychological disorders, while psychotherapy uses talk therapy to change mental and emotional experiences.
Step-by-step explanation:
A major difference between biomedical therapies and psychotherapy in their approach to psychological disorders lies in the underlying philosophy and methods each employs to treat the individual. Biomedical therapies are based on the biopsychosocial model and focus on biological aspects, using medication or other medical interventions to directly alter brain chemistry and physiological functions to relieve symptoms of mental disorders. In contrast, psychotherapy, influenced by theories from psychology such as cognitive-behavioral therapy (CBT), client-centered therapy, or psychodynamic therapy, addresses the psychological dimensions of disorders. It involves talk therapy and is designed to explore the mental and emotional experiences of the individual, aiming to change thought patterns, behaviors, and emotional responses related to the disorder.