Online spelling accuracy.

<p>Plot <b>A–C</b> describe the spelling accuracy obtained by the sequential classifier. The target sentence and the top-3 ranked characters of two users are shown in <b>A</b>. Histogram <b>B</b> depicts the rank of the target letter averaged across subjects. The individual rank-histograms are shown in C. Plot <b>D</b> depicts the spelling accuracy (rank = 1) of the standard classifier and the sequential classifier for each subject and the grand average (thick line). Plot <b>E</b> depicts the information transfer rate for each subject.