Prior to the DSM-III-R, conditions that are currently characterized as disorders were referred to by several different names, including depressive disorders, affective disorders, and depressive neuroses.

Mood

Explanation:

mood disorders were referred to by several different names, including depressive disorders, affective disorders, and depressive neuroses.

A mood disorder is a mental health class that health professionals use to broadly describe all types of depression and bipolar disorders

Mood.

Explanation:

Mood disorder is a kind of disorder that affects people that are suffering from it emotionaly. It is very important to note that mood disorder is not the same thing as to say when someone is in bad mood both of them are completely not the same. Under mood disorders we have classification of different kinds of depression and bipolar disorders.

DSM-III-R stands for Diagnostic and Statistical Manual of Mental Disorders which is used by Psychiatrists in order to classify some conditions or disorder.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.