Conformity: what the group makes the individual say

In Solomon Asch's work, participants had to say which of three lines was the same length as a reference line, an unambiguous task. Placed in a group where all the others, confederates of the experimenter, gave a false answer, a notable share of participants aligned themselves with the group's error.

The important point is not the exact rate, which varies with conditions, but the nature of the task: it was visual and with nothing at stake. If alignment occurs there, one may expect it to occur more on ambiguous questions, where the right answer is not visible.

The interviews conducted after the experiment showed that the aligned participants did not all believe the group's answer. Some doubted their own perception, others knew they were right and preferred not to stand out. That distinction is the heart of the matter.

The first is informational: if everyone says something else, perhaps I am wrong, and the group's view is treated as information. That reasoning is often useful: in ordinary life, the convergence of others is a serious indication.

The second is normative: I know the group is wrong, but I prefer not to isolate myself. It is no longer a matter of knowing but of belonging, and nothing in the available information will correct it.

These two drivers call for different remedies. Against the first, access to independent information really helps. Against the second, all that counts is the social cost of disagreement, which depends on the setting: a show of hands and a secret ballot do not produce the same results.

A complementary result of the same work deserves to be known: the presence of a single person giving the right answer strongly reduces the alignment of the others. Apparent unanimity is therefore the main condition of conformity, more than number.

This gives particular value to the first objection raised in a meeting: it convinces nobody by itself, but it makes expressing disagreement possible for those who shared it without daring to say so.

At collective scale, the mechanism manufactures gaps between what people think and what they say. A position may seem dominant in conversations and in the minority at the ballot box, or the reverse, depending on the cost of expressing it.

This gap makes climates of opinion unstable: when the cost of expression falls abruptly, a position held to be marginal may appear widely shared, without any mind having changed. It is a phenomenon observed during many political tipping points.

Three arrangements materially change the quality of a deliberation, without changing anything about the people present: collecting views in writing before the discussion, having the person with the most authority speak last, and explicitly designating someone to voice the objection.

For oneself, the simplest marker is the comparison between what one would say alone and what one says in a group. When the gap becomes systematic, it is no longer a social adaptation, it is an opinion that is no longer one's own.