On the topic of multifinger displays:
Dr. Bliss is right; two adjacent fingers are no better than one. Smith-Kettlewell experiments suggest that the failure to gain improvement is a selective-attention problem.
Perhaps if both fingers saw the same presentation, research might be warranted. However, cluttering the reader's view with more than one letter at a time will decreas the thru-put, not increase it.
Bill Gerrey
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