In order to make quite sure that the discussion and not the seeing of the vote is responsible for the marked improvement in the case of men, I carried on some further experiments in which the voting alone was involved. To bring this mental process to strongest expression, I went far beyond the small circle which was needed for the informal exchange of opinion, and operated instead with my large class of psychological students in Harvard. I have there four hundred and sixty students, and accordingly had to use much larger cards with large dots. I showed to them any two cards twice. There was an interval of twenty seconds between the first and the second exposures, and each time they looked at the cards for three seconds. In one half of the experiments that interval was not filled at all; in the other half a quick show of hands was arranged so that every one could see how many on the first impression judged the upper card as having more or an equal number or fewer dots than the lower. After the second exposure every one had to write down his final result. The pairs of cards which were exposed when the show of hands was made were the same as those which were shown without any one knowing how the other men judged. We calculated the results on the basis of four hundred reports. They showed that the total number of right judgments in the cases without showing hands was 60 per cent. correct; in those with show of hands about 65 per cent. A hundred and twenty men had turned from the right to the wrong—that is, had more incorrect judgments when they saw how the other men voted than when they were left to themselves.