Many scientific studies have found that, after making a mistake, we respond more slowly in the next round. This might be because the brain is trying to give itself more time, to avoid making the same mistake again. The stronger the ERN is after an error, the slower the response in the next round tends to be.
Some people have a larger ERN than others. Does this mean that these people are more sensitive to making errors and learn more from their mistakes? Some studies seem to support this idea. For instance, Hirsh and Inzlicht found that a stronger ERN was associated with better school performance. In their study, the researchers measured the brain activity of university students and found that the students who had a larger ERN also tended to have better grades.
Having a strong ERN is not necessarily always a good thing, however. People who are more anxious tend to have stronger ERNs, and very strong brain responses to errors are associated with increased distractibility rather than improved focus.

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Go to source: https://kids.frontiersin.org/article/10.3389/frym.2020.00080