A difference between self-ratings and other people’s feedback is not automatically a problem. It can reveal expectations, blind spots, context or strengths that the participant has undervalued.
Explore the evidence
Ask which situations raters may have observed and what behaviour influenced their rating. Avoid treating either the self-score or the group score as the single truth.
Look for meaningful patterns
A consistent difference across several rater groups deserves attention. One isolated score may reflect limited contact or an unusual event.