Correction to: Atten Percept Psychophys.

https://doi.org/10.3758/s13414-017-1453-z

An incorrect symbol appeared in the Fig. 3 caption of the published article. The correct symbol for the caption appears below along with the correct artwork.

Fig. 3
figure 1

a, b The value of this discrimination threshold, σ, is shown in the upper right corner of the figure