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5-HTTLPR and Positive Emotional Expressions: Results from Aggregate Study Sample
Note. Means (Ms) shown. Standard errors represent SE(M). The y-axis represents the z-standardized positive emotional expressions score. l/l = Individuals with two long alleles (n = 90) or at least one xl allele (n = 8) of 5-HTTLPR. s/l = Individuals with one short and one long allele of 5-HTTLPR (n = 171). s/s = Individuals with two short alleles of 5-HTTLPR (n = 67).
