When originally published, the article by Czapka et al, included the wrong caption for Fig 1. The publication indicates that Fig 1 shows data for heterogeneous groups when in fact it shows data for homogenous groups.

Fig. 1. Mean response latencies (with error bars indicating standard errors) of the A) go/nogo task, B) BST and C) N-back for the homogenous groups (mono-linguals - dark bars and multilinguals - light bars).

The correct figure and caption are shown below