From experience, they tend to slouch a little, or have a more passive/demure posture. They tend to be somewhat soft-spoken. They always want to relate emotionally to what others are talking about, and can be engaging in the conversation- nodding, agreeing, smiling, etc. They tend to be dressed with care and somewhat sensibly, although perhaps slightly eclectically. They might have random although interesting thoughts that they tend to bring up randomly- perhaps not related to the conversation, they can have a lot of tangents within conversations. They will listen very carefully to everything that you are saying, and if they disagree, their body language will express that almost instantly (unless they are more developed). More developed INFJs tend to be a bit more closed off, not as expressive, less likely to express ideas when first meeting a person. They can be a bit unaware of themselves- clumsy, unaware of body language.
