When redundancy hurts letter detection: an attempt to define one condition.
Johnson
N F
NF
Blum
A J
AJ
D001288:Attention; D005403:Fixation, Ocular; D005556:Form Perception; D006801:Humans; D008960:Models, Psychological; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D014794:Visual Fields