Dr. turnbull uses the biopsychosocial model to guide his research into how psychological factors influence health, illness, and treatment. he is most likely a:

Dr. Turnball is likely to be health psychologist. It is because a health psychologist is likely to be responsible for studying behavioral process and psychological in regards with the individual’s health. It is being studied in means of understanding how it occurs and what contributes for physical illness and health to occur in an individual.