Hippocrates and Galen were among the intellectuals who, after a period in which it was believed that demons or spirits were the causes of mental diseases, came to the realization that aberrant conduct was caused by bodily injuries or sickness, or as having biological or organic origins.
While Hippocrates was advocating for this idea, he did not do any empirical research on it. In other words, he did not carry out any scientific trials to validate his claims.
Galen was the first person to perform scientific experiments on non-human animals to investigate aberrant behavior in order to understand how alterations in various bodily parts may create abnormal behavior.
As a result, Galen was the first person to examine abnormal behavior using a scientific approach.
This is further explained below.
<h3>What are abnormal behaviors?</h3>
Generally, The phrase "activities that are unexpected and typically judged adversely because they depart from ordinary or customary conduct" accurately describes abnormal behaviors.
The following criteria are considered to be open to interpretation: maladaptive and dysfunctional behavior.
Because of the circumstances, behaviors have not completely adapted to the context in which they are found.
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