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Incidence of each motive profile across TG groups. (A–F) Refer to altruism, spitefulness, egalitarianism, efficiency, strategic self-interest, and narrow selfishness, respectively. The percentages provided refer to the proportion of subjects within each group which can be classified according to each motive type. As can be seen in Figure 1B, the number of observations in each group are 439 in YY, 108 in YN, 112 in NY, and 115 in NN.
