MBTI Cognitive Functions

Those two-letter codes — Ti, Se, Ne, and the rest — are the cognitive functions. Thinking and Intuition read masculine. Sensing and Feeling read feminine.

Thinking and Intuition (Te, Ti, Ne, Ni) — logic, vision, patterns, where it’s going. Sensing and Feeling (Se, Si, Fe, Fi) — the room, the nest, the body, people, and values. This is about the functions, not whether a person is a man or a woman.

Masculine

Thinking & Intuition

Te, Ti, Ne, Ni — the mind. Logic, systems, what-ifs, and “this is where it’s going.”

Feminine

Sensing & Feeling

Se, Si, Fe, Fi — atmosphere, nest, body, values, and people. Se notices how the space feels right now. Si keeps it that way: clean, familiar, comfortable.

Masculine
Te

Extraverted Thinking

Thinking · outer world

Organizes people, plans, and systems with measurable logic. Efficiency, metrics, and “does it work out there?”

Masculine
Ti

Introverted Thinking

Thinking · inner world

Builds a private logical model. Precision, categories, and “does this actually make sense?”

Feminine
Se

Extraverted Sensing

Sensing · outer world

Attuned to the surroundings as they are right now — light, vibe, texture, how the room looks and feels. Aesthetic environment, not a spreadsheet.

Feminine
Si

Introverted Sensing

Sensing · inner world

The nest. Cleanliness, comfort, “this is how the house should be.” Memory of what felt right last time — including keeping the space cared for.

Feminine
Fe

Extraverted Feeling

Feeling · outer world

Reads the social field. Harmony, manners, group values, and making other people feel held.

Feminine
Fi

Introverted Feeling

Feeling · inner world

Personal ethics and authenticity. Quiet conviction about what is right, dear, or intolerable.

Masculine
Ne

Extraverted Intuition

Intuition · outer world

Brainstorms in public. Patterns, what-ifs, and leaping connections between ideas that aren’t obviously related.

Masculine
Ni

Introverted Intuition

Intuition · inner world

Single-point vision. Future images, “this is where it’s going,” arriving as a compressed inner knowing.

16 types by dominant function

Each type’s first function inherits that function’s polarity.

INTJNi Te Fi SeNi · masculine
INTPTi Ne Si FeTi · masculine
ENTJTe Ni Se FiTe · masculine
ENTPNe Ti Fe SiNe · masculine
INFJNi Fe Ti SeNi · masculine
INFPFi Ne Si TeFi · feminine
ENFJFe Ni Se TiFe · feminine
ENFPNe Fi Te SiNe · masculine
ISTJSi Te Fi NeSi · feminine
ISFJSi Fe Ti NeSi · feminine
ESTJTe Si Ne FiTe · masculine
ESFJFe Si Ne TiFe · feminine
ISTPTi Se Ni FeTi · masculine
ISFPFi Se Ni TeFi · feminine
ESTPSe Ti Fe NiSe · feminine
ESFPSe Fi Te NiSe · feminine

Jung originally parked Sensing with masculine Logos and Intuition with feminine Eros. This page does not. Thinking and Intuition (Te, Ti, Ne, Ni) are masculine — mind, vision, patterns. Sensing and Feeling (Se, Si, Fe, Fi) are feminine — environment, nest, body, people. Se is how the space feels now; Si is keeping it that way. Extraversion vs introversion is a separate axis (outer vs inner), not a gender. People of any sex use all eight functions.