Mean PSWQ scores as a function of 5-HTTLPR and BDNF genotypes. Scores from the BDNF val-met and met-met groups are collapsed (into a “met carrier” group), both for ease of interpretation and in line with the results from the follow-up (correlational) analyses described in the text. On that note, we also conducted follow-up simple slope analyses, which revealed that the slope of the association between 5-HTTLPR short alleles and worry approached statistical significance at one BDNF met allele (t = 1.81, p = .07), and reached significance at a point just beyond this (1.05 met alleles). For the specific numbers of participants in our sample with each genotype combination, please see Table B in the Supplementary Materials.