A new colleague arrives, says little during introductions, and takes a seat near the door. By lunchtime, you have privately described them as unfriendly. Yet the evidence is smaller than the description: they spoke briefly and chose a particular seat. You do not know whether they were concentrating, unfamiliar with the group, worried about another obligation, or simply comfortable listening. A first impression can help you notice something worth exploring. It becomes less useful when it starts standing in for information you have not gathered.
Begin by writing the observation without a character label. “They answered my greeting with two words” is more precise than “They dislike me.” “The candidate spoke confidently about one project” is narrower than “The candidate will handle every difficulty well.” This distinction matters because a label quietly spreads into other judgments. If you have already called someone careless, a late reply may look like further proof even when the message arrived outside their working hours. Keep the original event small enough to examine.
Next, name the interpretation honestly: “I took the brief greeting to mean that they wanted distance.” You do not have to deny your discomfort or pretend that every encounter feels welcoming. Instead, make room for two other plausible accounts. Perhaps the person did not hear the whole introduction; perhaps they prefer a quieter start. These alternatives are possibilities, not explanations you should announce as facts. Their purpose is to show where your certainty exceeds what the encounter can support.
The stakes should determine the amount of checking. When deciding where to sit at a casual gathering, you can make a light choice and change it later. When deciding whether to hire someone, share confidential information, or exclude a teammate from a project, one moment deserves much less weight. Identify the behavior that actually matters for the decision. A friendly manner does not answer whether a person can meet an agreed deadline. A reserved manner does not answer whether they can listen carefully to a client.
Choose a respectful way to obtain relevant information. Invite the colleague into a small conversation with a concrete question: “Which part of the handover would you like us to explain first?” For a candidate, ask everyone the same job-related question and review the work sample against the same criteria. Avoid arranging a secret test of someone’s personality. You are trying to improve a decision, not catch the person performing the role you assigned them. A clear task usually tells you more than another vague impression.
Look for evidence that could change your mind as well as evidence that agrees with it. Suppose the quiet colleague later answers a newcomer’s question patiently and sends useful notes after a meeting. Those actions belong in your account, even if the first greeting still felt awkward. Conversely, someone who made an excellent first impression may repeatedly interrupt or ignore agreed responsibilities. Updating a judgment is not inconsistency. It is a way of keeping the judgment connected to what has actually happened.
Checking an impression does not require unlimited access to you. If someone makes a specific insulting remark or ignores a clearly stated boundary, respond to that behavior directly. You can say, “Please do not comment on my appearance at work,” without deciding why the person said it or what their whole character must be. You can also decline a request while you remain uncertain. Fairness does not mean forcing closeness, accepting repeated disrespect, or postponing every practical decision until all doubt disappears.
At the end of the week, revisit the original sentence. Replace “unfriendly” with the fuller account you can now support: “They were quiet at first, answered work questions clearly, and usually prefer written details.” If you still have little information, leave the conclusion open. A useful final question is, “What would I need to observe before this judgment becomes relevant to my next decision?” This turns a quick impression into a provisional note. It leaves the other person room to be more than the first few minutes you happened to see.
