Re the term "preventive RA". I also know the terms "increase RA" and "reverse RA".
Both only occur after a "normal" RA. What sets them apart from the "normal" RA is the time you have to react. While you have 5sec to react to a "normal" RA, for "increase RA" and "reverse RA".you only have 2.5sec to react. This is also obvious, since the original manoeuver was not sufficient, you then have to react even faster.