Nature Reviews Neuroscience (2020) https://doi.org/10.1038/s41583-020-0275-5 Published online 10 March 2020

In the originally published article, there was an error in the colour key shown in part g of Figure 2. This should have indicated that the blue lines represent observer performance before receipt of prior object knowledge, whereas the red lines represent observer performance after receipt of prior object knowledge. This has been corrected in the HTML and PDF versions of the article.

figure 2