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Individual differences in cognitive performance are partly dependent, on genetic polymporhisms. One of the single‐nucleotide polymorphisms (SNP) of the CNR1 gene, which codes for cannabinoid receptor 1 (CB1R), is the rs2180619, located in a regulatory region of this gene (6q14–q15). The alleles of the rs2180619 are A > G; the G allele has been associated with addiction and high levels of anxiety...