Table 2. Statistics of speech recognition rates in the high- and low-level groups. The number indicates correctly recognized words, followed by the percentage in parenthesis. SD indicates the standard deviation; Max, the highest instance; Min, the lowest instance

Groups	Statistics	Content words (%)	Function words (%)	All words (%)
High	Average	37.7 (80.1)	43.5 (85.2)	81.1 (82.8)
	SD	1.8 (3.8)	1.5 (3.0)	2.1 (2.2)
	Max	41 (87.2)	45 (88.2)	86 (87.8)
	Min	35 (74.5)	40 (78.4)	78 (79.6)
Low	Average	31.6 (67.2)	40.0 (78.4)	71.6 (73.0)
	SD	3.5 (7.4)	2.1 (4.1)	4.9 (5.0)
	Max	37 (78.7)	43 (84.3)	77 (78.6)
	Min	26 (55.3)	36 (70.6)	62 (63.3)