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When asked to write down the name of their favorite color and number (between 0 and 9), 353 boys and 308 girls from Niger tend to write 9 and red; the majority of 121 Japanese boys and 112 girls think first of all 7 and blue; Transkeian children (95 boys and 126 girls) prefer generally 8 and black; 126 boys and 155 girls from Brazzaville tend to choose 9 and red. These heterogeneous results indicate once more that number and color preferences are related to cultural context.
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Vandewiele et al. (1986) studied this question.
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