Dopamine transporter genotype predicts attentional asymmetry in healthy adults

► An overall leftward bias/pseudoneglect was observed. ► Individuals homozygous for the DAT1 10-repeat allele showed no pseudoneglect however. ► While individuals lacking 10-repeat DAT1 homozygosity showed pronounced pseudoneglect. ► The effect of DAT1 on spatial bias was not modulated by non-spatial attention load.