Table 2.

Typing Results for 16 Users on Five Test Strings (Total 31 Words, 145 Characters), Under Six Conditions, with Calibrated Scan Rates

Scanning condition	Speed (cpm)	Bits per character		Error rate	Long code rate
	M (SD)	M (SD)	opt	M (SD)	M (SD)
Row/column step scan	21.2 (3.8)	8.4 (2.5)	4.5	6.2 (4.4)	30.4 (17.9)
Row/column 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)
Huffman 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)