Table 1. Parameters defining the sigmoidal functions fitted to the data.

Condition	β0	βA	Bias = $(-\frac{{\mathbf{\beta }}_{\mathbf{0}}}{{\mathbf{\beta }}_{\mathbf{A}}}-\mathbf{5.0})$
Entry condition	-4.3736***	0.8590***	+0.0915 cm (Left bias, n.s.)
Exit condition	-4.0999***	0.8661***	-0.2663 cm (Right bias, n.s.)
Overall	-4.2330***	0.8602***	-0.0781 cm (Right bias, n.s.)
Theoretical zero bias	-4.3010	0.8602	0.0000 cm (Zero bias)

β₀: Intercept parameter; β_A: Aperture parameter

***: P < 2E-16