Behavioral coding works best after personal identification is established.

Evidence

That is, one can best code another’s behavior (verbal as well as nonverbal) if one knows “who” he or she is. The more one knows about the other, the better one is able to assess his or her actions. The most accurate readings are of those known personally. Therefore, in the world of strangers, behavioral clues are frequently most useful after an identification has been made, not before. — Lyn H. Lofland, World of Strangers_ Order and Action in…, 611

Categorization

• XREF: Counterintuitive reversal that bears on the purpose: in the world of strangers, behavioral cues are circular—they require exactly the knowledge strangers lack.