Which of the following is not a sub-area of the application of behavioral principles in health psychology?
a. establishing treatment compliance
b. promotion of healthy living
c. stress management
d. psychological testing of personality disorders

d. psychological testing of personality disorders

Explanation:

According to my research on studies conducted by various psychologists, I can say that based on the information provided within the question the element that is not a sub-area is psychological testing of personality disorders. This is can be said because this measures extroversion, agreeableness, conscientiousness, emotional stability, and intellect/imagination, but does not focus on the physical effects it may have on the body.

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i have nooo ide tbh

d, i believe because of it's activity level