The id, ego and superego

In plain words

Freud pictured the mind as three parts in negotiation. The id wants: it is the raw pull of appetite and impulse. The superego judges: it is the voice of rules and conscience, usually learned from parents. The ego sits between them and the outside world and tries to find something that can be done. A person's inner conflict is, in this model, a conflict among the three.

Where the idea comes from

The model was set out in Das Ich und das Es (The Ego and the Id), published in April 1923. It replaced Freud's earlier division of the mind into conscious and unconscious (with a preconscious between), because that division could not explain a fact he had noticed: the ego itself carries out repression without knowing it, so part of the ego is unconscious.

In the book, the ego is described as a modified portion of the id and as a system of perception tied to preconscious ideas; Freud compares it to a rider who must control a horse but sometimes has to follow it, and calls it a "body-ego". The superego, or ego-ideal, is a part of the ego that acts repressively and carries moral authority; it forms by internalisation in the Oedipus complex. The Internet Encyclopedia of Philosophy notes a resemblance to Plato's three-part account of the soul. The id is tied to the pleasure principle and the ego to the reality principle.

How it shows up

The model is used as a way of describing inner argument: a wish, a prohibition and a compromise. A person who says "part of me wants to leave and part of me says I would be selfish" is describing something the model was built to name, though they would not need it to say so. Most defence mechanisms are described as the ego's work.

TwentyThird does not sort members into id, ego or superego types, and Oneli, the AI agent, does not use the model to assess anyone. It can notice when a member's writing carries an unusually harsh inner voice, and say so in plain words.

What it is not

The three agencies are not parts of the brain, and not three people inside one. They are a metaphor, and one psychoanalytic school's. The model is hard to test: the Internet Encyclopedia of Philosophy reports the objection that Freudian theory lacks rules linking its hidden causes to observable events. Later schools revised or dropped it, and many therapists work without it. It is also not a personality test.