Mental Filtering
Mental filtering, also called selective perception, is picking out a single negative detail from an otherwise mixed or positive experience and dwelling on it exclusively, so that this one detail comes to colour the person's entire view of the situation, while everything else that happened is effectively filtered out.
Illustration
At a party where nearly everyone tells a woman how well she looks, a single passing comment that she should try a different hairstyle is the one thing she can think about on the way home, and the evening she remembers afterward is one of feeling criticised rather than admired.
References
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Appendix II, 'Defences and Distortions'.