For me, the term signifier refers to any mark…

For me, the term signifier refers to any mark or sound, any perceivable indicator that communicates appropriate behavior to a person.

— from The Mind in the Cockpit · Design of Everyday Things by Don Norman

Also belongs to

• The Heart in the Cockpit (Emotion/Awe/Anxiety/Regret/Empathy)
• Communication & Conflict (Communication/Conflict)
• Decisions & Choices (Decision/Choice/Focus/Forethought/Consequences)

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