highly significantp<0.0001
All effects were highly significant in twins: Stroop (RT: t = 14.0, p<0.0001; error: t = 3.2, p=0.0048), AX-CPT (RT: t = 6.6, p<0.0001; error rate: t = 5.7, p<0.0001), Cued-TS (RT: t = 5.7, p<0.0001; error: t = 4.9, p<0.0001), Sternberg (RT: t = 7.3, p<0.0001; error rate: t = 11.2, p<0.0001).