A regression model of the form: 
= 
+ 
+ 
+ 
+ 
is called a 3rd order polynomial model.
Definitions:
Conscientiousness
A personality trait characterized by thoroughness, diligence, and the organization of one's actions.
Empirically Derived
Derived from or guided by experience or experimentation rather than theory or pure logic.
Discriminate
To make a distinction or differentiate, often unfairly, between individuals or groups based on characteristics such as race, gender, or age.
Personality Disorders
A category of psychological disorders distinguished by persistent unadaptive behavior, thought processes, and feelings that are expressed in various situations and differ significantly from what is considered normal within the person's cultural background.
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