The situation, task, action, result (STAR) format is a technique[1] used by interviewers to gather all the relevant information about a specific capability that the job requires.
This R aims to gather insight and interviewee's ability to learn and iterate.
Whereas the STAR reveals how and what kind of result on an objective was achieved, the STARR with the additional R helps the interviewer to understand what the interviewee learned from the experience and how they would assimilate experiences.
The interviewee can define what they would do (differently, the same, or better) next time being posed with a situation.
Common questions that the STAR technique can be applied to include conflict management, time management, problem solving and interpersonal skills.