Table 2

Simple linear models

Model information	Number of observations	Error degrees of freedom	Root mean squared error	R²	Adjusted R²	F statistic vs constant model	p value
Control condition	22	20	0.0853	0.994	0.994	3.61E + 03	4.52E-24
Adaptation condition	12	10	0.137	0.978	0.976	445	1.27E-09
Estimated coefficients	Estimate	SE	95% CI			t statistics	p value
Control condition
Intercept	−0.07842	0.039006	[−0.1598, 0.0029]			−2.0105	0.05806
log(upperContrast)	0.97174	0.016167	[0.9380, 1.0055]			60.106	4.5188E-24
Adaptation condition
Intercept	−0.039806	0.090256	[−0.2409, 0.1613]			−0.44104	0.66857
log(upperContrast)	1.3746	0.065132	[1.2295, 1.5197]			21.105	1.2679E-09

Full results. Data and analysis code are available as Extended Data 1. SE, standard error; CI, confidence interval; DF, degrees of freedom.