Metadata

If you click on the polarity field in the about project section of the user interface, you will be able to see helpful information about each dataset.

Actions

The polarity should be either positive or negative, however, it's possible that the value is also unknown. In this case, it's worthwhile checking why this is the case.

Warning

If the polarity field says mixed then it's usually a sign that you put both positive and negative datasets together. This is not recommended as it can lead to unexpected results.