First impressions are the quick judgments people form when they meet someone new. In a new school, club, team, interview, or social event, these judgments can affect who feels approachable, trustworthy, confident, or friendly. They matter because the brain uses limited information to make fast social predictions.
These snap judgments can be useful, but they can also be biased or incomplete.
Key Facts
- Thin-slice judgment means forming an impression from a very brief sample of behavior, sometimes in less than one second.
- The halo effect occurs when one positive trait, such as confidence, makes people assume other positive traits, such as intelligence or kindness.
- Confirmation bias makes people notice evidence that supports their first impression and ignore evidence that challenges it.
- Body language signals include posture, eye contact, facial expression, personal space, gestures, and tone of voice.
- Impression strength = cue clarity + cue consistency + observer attention.
- A better first impression comes from matching friendly verbal messages with open body language and respectful listening.
Vocabulary
- Thin-slice judgment
- A thin-slice judgment is a quick impression based on a very small sample of someone’s behavior.
- Halo effect
- The halo effect is a bias where one positive quality makes a person seem better in other unrelated ways.
- Confirmation bias
- Confirmation bias is the tendency to look for, remember, or believe information that supports what you already think.
- Nonverbal communication
- Nonverbal communication is the information people send through facial expressions, posture, gestures, eye contact, and tone.
- Micro-expression
- A micro-expression is a very brief facial expression that may reveal an emotion before a person controls their face.
Common Mistakes to Avoid
- Assuming a first impression is always accurate is wrong because quick judgments are based on limited information and can miss important context.
- Judging confidence only from loudness is wrong because confidence can also appear as calm posture, steady eye contact, and clear listening.
- Ignoring your own body language is wrong because people often react to posture, facial expression, and tone before they fully process your words.
- Looking only for evidence that your first impression was right is wrong because confirmation bias can stop you from learning what a person is really like.
Practice Questions
- 1 At a club meeting, 30 students meet a new team captain. If 60 percent form a positive first impression after the first minute, how many students formed a positive first impression?
- 2 In a survey, 24 out of 40 teens say eye contact made a new person seem more approachable. What percent of the teens chose eye contact?
- 3 A new student seems quiet on the first day, and a classmate decides the student is unfriendly. What alternative explanations should the classmate consider before trusting that first impression?