Table 3. Mean, SD and Range of PetCO₂ responses to CS+ and CS- during the last two Blocks of Acquisition for Hypoventilators (N = 14) and Hyperventilators (N = 19).

		Acquisition Block 2		Acquisition Block 3
		CS+	CS-	CS+	CS-
Hypoventilators	Mean	0.5	0.6	0.8	0.3
	SD	0.7	0.7	1.1	0.7
	Range	-0.7 - 1.5	-0.6 – 1.5	-0.4 – 4.2	-0.9 – 1.8
Hyperventilators	Mean	-0.8	0.2	-0.8	0.3
	SD	0.9	0.8	0.9	0.9
	Range	-2.6 – 0.7	-1.1 – 1.9	-3.4 – 0.5	-0.9 – 2.5