Dissent
As soon as there's someone who disagrees, or even just dithers or can't decide, conformity is reduced. Some studies have found conformity can be reduced from highs of 97% on a visual judgement task down to only 36% when there is a competent dissenter in the ranks (Allen & Levine, 1971).
Dissenters must be consistent, though, otherwise they'll fail to convince the majority.
反对的声音
只要有人不同意，或者犹豫不决，或者下不了决心，从众心理就会减少。一些研究发现，当军队中拥有决定权的人反对时，即使是亲眼所见，从众的人也可能从97%的高点减少到36%。
反对者必须坚持一致，否则就不能成功说服大多数人。