approached significancep = 0.069
There was however no overall main effect of stimulus F (1, 29) = 2.690, p = 0.112 or of gas using a 2 (stimulus: preexposed, non-preexposed) × 2 (gas: CO 2 , medical air) repeated measures ANOVA but the overall 2-way interaction between stimulus × gas approached significance F (1, 29) = 3.554, p = 0.069, partial η 2 = 0.109.