What you expect from people influences what you allow yourself to notice about them.

Expectations about a person control what you are able to notice about them. Decide someone is careless and you will collect the evidence and miss the rest, and they will experience you as someone who does not see them. It becomes a closed loop quickly.

Pick someone you have a fixed view of and go looking for one counterexample this week. Not to change your mind by decree, but to check whether the file is current.