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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Comput Speech Lang. 2012 Oct 23;27(6):10.1016/j.csl.2012.10.006. doi: 10.1016/j.csl.2012.10.006

Table 2.

Text entry results for 16 users on 5 test strings (total 31words, 145 characters) under six conditions, with calibrated scan rates.

Scanning condition Speed (cpm) mean (std) Bits per character Error rate mean (std) Long code rate mean (std)
mean (std) opt.
row/column step scan 21.2 (3.8) 8.4 (2.5) 4.5 6.2 (4.4) 30.4 (17.9)
auto scan 19.6 (3.2) 8.0 (1.7) 4.5 4.6 (3.0) 28.9 (13.3)
Huffman unigram 12.8 (2.3) 7.9 (1.7) 4.4 4.4 (2.3) 35.1 (13.0)
8-gram 24.5 (3.9) 4.0 (0.9) 2.6 4.2 (2.2) 15.4 (12.5)
Linear grid 8-gram 23.2 (2.4) 4.1 (0.6) 3.4 2.4 (1.7) 4.3 (3.4)
RSVP 8-gram 20.9 (4.4) 5.5 (2.2) 3.4 7.1 (4.8) 4.2 (3.7)