Reaction formation

In plain words

Reaction formation is the mind's way of hiding a feeling by performing the opposite one, loudly. Hostility toward someone is covered by excessive warmth. Envy turns into insistent praise. The opposite feeling is real in the sense that the person does act on it; what gives it away is how much more of it there is than the situation needs.

Where the idea comes from

The German term is Reaktionsbildung. Anna Freud's 1936 The Ego and the Mechanisms of Defence lists it among the ten mechanisms she drew from her father's work, and it sits at the neurotic level in Vaillant's hierarchy of defence mechanisms. The Wikipedia article on the concept cites Charles Rycroft's A Critical Dictionary of Psychoanalysis and Calvin Hall's A Primer of Freudian Psychology (1954), in which Hall describes the ego diverting an impulse by concentrating on its opposite.

The article gives the clinical signs as exaggeration, compulsiveness and inflexibility, as in love that "protests too much". The original feeling is assumed to persist unconsciously beneath the surface, which is the theory's own claim and is not directly observable.

How it shows up

A familiar type of situation: a person who is stern about a habit or a group, with a force that seems to exceed the subject, and who later turns out to have a personal stake. In close relationships it may look like over-attentiveness toward someone the person also resents. In writing, it shows up as unusual intensity and little qualification.

Oneli, the AI agent on TwentyThird, can notice when a member's language about a person or topic is unusually one-sided. It does not claim to know what is behind it; it can ask whether there is another side to the feeling.

What it is not

It is not the same as sincere strong feeling, and exaggeration alone does not show it. Experimental support is thin. The Wikipedia article reports two older studies, Morokoff (1985), in which women with high sex-guilt reported low arousal while a physiological measure showed higher-than-average responses, and Dutton and Lake (1973), in which participants told they had racist tendencies gave more money to a panhandler. It also notes that Baumeister, Dale and Sommer (1998) found that "a few studies" support the concept. These are limited tests, not proof, and none of them licenses reading a person's hidden feelings from their conduct.