Correction to: Nature Human Behaviour https://doi.org/10.1038/s41562-017-0186-2 (2017); published online 21 August 2017.

In the version of this Letter originally published, in the sentence beginning “Written symbols are culture specific...”, in the second example, ‘Φ’ was used instead of ‘F’; it should have read ‘(for example, versus F)’. This has now been corrected in all versions of the Letter.