Transcranial direct current stimulation over the frontal eye field has no effect on visual search performance.

For small search fields, the negative correlation between baseline performance and tDCS-related changes was once more reproduced, but again for both anodal and sham tDCS (anodal: ρ(29)=−0.67, p Bonf < 0.001; sham: ρ(29)=−0.54, p Bonf = 0.004), whereas for large search fields exploratory correlation analyses failed to reach significance in any condition (anodal: ρ(29)=−0.38, p Bonf = 0.069; sham: ρ(29)=−0.35, p Bonf = 0.107).

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