Corrections to: Asymmetries between achromatic increments and decrements: Perceptual scales and discrimination thresholds

CORRECTIONS TO: Shi, Y., & Eskew, R. T., Jr. (2024). Asymmetries between achromatic increments and decrements: Perceptual scales and discrimination thresholds. Journal of Vision, 24(4):10, 1–16, https://doi.org/10.1167/jov.24.4.10. 

Due to a coding error, two of the reported parameter values in Table 1 were off by a factor of 2.0 (see Figure 4); we had intended to report the sensory noise, σ_A±, but instead used the final noise standard deviation, 2σ_A±. Thus, when fitting the discrimination model (Equation 3), the estimated proportionality k_A± was half the size it should have been. Correcting this error by halving the noise estimate makes the estimated proportionality closer to the theoretically derived value of 1.29 (see Discussion: Constant and noise), although it still is smaller than signal detection theory implies. Because the changes to σ_A± and k_A± offset each other, there is no change to the prediction of the pedestal discrimination functions and no change to our main conclusions. The table has been corrected in the article online. 

Original Table 1: 

 

 

 

 

Corrected Table 1: 

 

 

 

 

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