What is a Cardinal trait according to Allport's Trait Theory?

In Allport's Trait Theory, a Cardinal trait is defined as a dominant characteristic that profoundly influences an individual's behavior and personality. These traits are so central to a person's identity that they can almost define the individual. Cardinal traits are relatively rare and often represent a defining feature of a person’s character, such as a deep commitment to a cause or an overarching sense of ambition.

For instance, an individual who is exceptionally driven by ambition may allow that trait to guide their decision-making processes throughout their life, affecting how they interact with others and what choices they make. Unlike other traits that might be situational or variable, a Cardinal trait remains a consistent and significant force within the individual's personality framework. This comprehensive influence marks its distinction in Allport's classification of traits.