The correct answer would be, Integrationist.
She essentially believes that all psychological events boil down to physical causes. Dr. Chattering holds an Integrationist view of psychological disorders.
Explanation:
If a person wants to bring together the two things, concepts, groups, etc, the person is called an Integrationist. An Integrationist wants to see two separate groups connected with each other.
When Dr. Chattering teaches his students about the psychological problems like Phobias, Schizophrenia, Depression, etc, she wants to join or group together the disorders or hormonal or neurotransmitter functioning with the physical causes as well, so she is basically acting an Integrationist.
It is generally seen that people with deep depression may have effect on blood pressure, heart, etc, which are physical conditions. So somehow, psychological disorders boil down to physical causes.
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