A1 : The primary difference is the clinical training component, which requires extensive time during graduate training and an internship year at the end. Otherwise, both programs aim to train top research scientists who investigate fundamental problems. Those who seek to study psychological disorders as a primary focus and who wish to obtain training in treatment of these disorders might be best suited to the clinical program. Those who seek to study interactions between mental and physical health and illness, comorbidities of diseases such as cancer or heart disease and mental health, or biological processes underlying physical and/or mental health broadly might be best suited to the health psychology major. Clinical graduate students can elect the health psychology minor.