The Basic Building Blocks

Cognitive functions are divided into four basic types:

Thinking (T): Focuses on logic, facts, and systems

Feeling (F): Prioritizes values, ethics, and human relationships

iNtuition (N): Deals with concepts, possibilities, and abstract patterns

Sensing (S): Concentrates on concrete reality, details, and direct experience

Each function can be either extroverted (e) or introverted (i), creating eight function-attitudes: Te, Ti, Fe, Fi, Ne, Ni, Se, and Si.