TABLE 1.

Statistical analysis of the bias of the estimates of the angle, eccentricity and pRF size obtained when simulating a narrow visual pRF (angle = 0.59 radians, eccentricity = 1.79°, pRF size σ = 0.23°) at different noise levels.

	Low Noise			Medium Noise			High Noise
	Angle	Ecc.	Size	Angle	Ecc.	Size	Angle	Ecc.	Size
HCP7pRF	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.
GS	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.	n.s.
COpRF	n.s.	−0.007	−0.05	n.s.	−0.01	−0.06	n.s.	−0.03	n.s.
LinEnc	n.s.	−0.24	0.57	n.s.	−0.33	0.61	n.s.	−0.59	0.68
ModelAve	n.s.	−0.006	−0.09	n.s.	−0.006	−0.01	n.s.	−0.006	n.s.

For every noise level, columns represent the different parameters while rows represent the different estimation methods. For significant effects (p < 0.05) we report the effect size (in units of the parameter), while n.s. indicates a non-significant effect. When significant bias was observed, the corresponding cell displays the mean of the estimated parameter minus the its true value.