Table 1. Parameter boundaries for model fitting.

	Bound		Initial Distribution
Parameter	Lower	Upper
β0 (response bias)	0	1.0	Uniform
β1 (response modulation)	0	0.5	Uniform
β2 (peak response angle)	-180	180	Uniform
β inv. temperature	10-4	20	Exponential
β OFFSET	-180	180	Uniform