Table 3.

Unstandardized regression coefficients (B), standardized regression coefficients (β), and p-values for the regression of test threshold on: baseline threshold (Step 1); baseline threshold and centered subjective arousal (Step 2); baseline threshold, centered subjective arousal, and squared-centered subjective arousal (Step 3) of Experiment 1.

	B (SE)	β	p
Step 1
Intercept	17.86 (2.20)		<0.01
Base line threshold	0.16 (0.10)	0.18	0.13
Step 2
Intercept	17.74 (2.13)		<0.01
Base line threshold	0.17 (0.10)	0.18	0.10
Linear-centered arousal	0.22 (0.090)	0.27	0.02
Step 3
Intercept	17.13 (2.10)		<0.01
Base line threshold	0.18 (0.10)	0.20	0.08
Linear-centered arousal	0.2 (0.09)	0.24	0.03
Quadratic-centered arousal	0.09 (0.04)	0.22	0.05