Skip to main content
. Author manuscript; available in PMC: 2015 Oct 23.
Published in final edited form as: Augment Altern Commun. 2015 Feb 12;31(1):37–50. doi: 10.3109/07434618.2014.997890

Table 5.

Typing results for One AAC User on Five Test Strings (Total 31 Words, 145 Characters), Under Four Conditions, with Fixed Scan Rates (1 s for Row/Column Scanning; 1.5 s Others)

Scanning condition Bits per character

Speed (cpm) Subject Opt. Error Rate Long Code Rate
Row/column auto scan 6.0 8.5 4.5 4.4 32.2
Huffman 8-gram 9.7 3.8 2.6 3.8 14.6
Linear grid 8-gram 9.5 3.9 3.4 2.0 5.4
RSVP 8-gram 7.5 5.2 3.4 5.5 5.2