Personality is composed of stable, measurable traits. The most widely accepted model today is the Big Five (OCEAN):

A high-quality PDF on this topic will explain how these traits are relatively stable over time but can shift slightly with maturity and life experiences (a concept known as the "Maturity Principle").

Freud argued that personality is fixed during five psychosexual stages (Oral, Anal, Phallic, Latency, Genital). Fixation at any stage leads to specific adult personality traits.

: Trait analysis helps uncover root causes of stress, anxiety, or interpersonal friction.

across the entire lifespan. He proposed eight stages, each characterized by a specific crisis (e.g., Trust vs. Mistrust) that must be resolved to develop a healthy personality. Trait Theory:

For in-depth study, you can access comprehensive articles and textbooks in PDF format through academic repositories: Theories of Personality (Open Resources)

Let’s explore each of these in depth to provide a foundation for your studies.

No single theory holds all the answers. Personality is a complex tapestry woven from biology, experience, culture, and choice. By understanding these foundational theories, you gain not just academic knowledge, but a powerful lens for self-reflection and empathy toward others.