The Friendship and selection that is natural internet and system 1

The Friendship and selection that is natural internet and system 1

To evaluate basic, general homophily within pairs of friends, we calculated the kinship coefficient (21)

To evaluate basic, general homophily within pairs of buddies, we calculated the kinship coefficient (21) (the likelihood that two alleles sampled at random from two folks are identical by state), a measure that is corresponding to half the relatedness measure utilized in genome-wide complex trait analysis (GCTA) approaches (22) (even though pairs of buddies listed here are perhaps not really associated). Good values with this measure suggest that genotypes are absolutely correlated, and negative values suggest that two people are maybe maybe maybe not associated and, in reality, generally have genotypes that are opposite. To measure heterophily, we calculated the probability that is empirical two folks have other genotypes at an offered SNP, calculated because of the percentage of SNPs for which neither allele is identical by state.

For contrast, we additionally calculated these measures for all nonkin “stranger” pairs utilizing the exact exact same group of 1,932 topics who will be within the buddies test.

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