Adjust intent confidence threshold?

Hi all.

Is it possible to adjust the threshold for the confidence required to trigger a specific intent?

I seem to be getting a very high number of false positives and would like to reduce the chance of this happening (even if it as the expense of an increase of false negatives).

If this is not possible, does anyone have any guidance about how to reduce this by refining the utterances I currently have? Does increasing the number of utterances reduce the likelihood of false positives? Should I aim to minimise the number utterances?

Any guidance on this topic would be very helpful.