The article discusses different ways to study personality, not just through traits. Trait theory is not the only way to understand personality, as there are other approaches like psychoanalysis and humanistic psychology. Traits are unique characteristics that can be compared to other theories. One important aspect is how consistent behavior is over time, which is not only studied in trait psychology. The article suggests that trait psychology is becoming the main way to research personality because it uses the scientific method and can explain why behavior stays the same.