Individual skill
constraint-psychological
Use this skill when designing constraints that work through perception, expectation, and learned convention — symbols, conventions, mappings. Trigger when designing iconography, picking control conventions, or designing for behavioral predictability. Sub-aspect of `constraint`; read that first.
plugins/HDeibler/universal-design-principles/plugins/interaction-and-control-principles/skills/constraint-psychological/SKILL.md
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SKILL.mdcore · 5,735 bytesreferences/conventions-and-symbols.mddoc · 2,680 bytes
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# Psychological constraints
Psychological constraints don't physically prevent action; they make wrong actions feel obviously wrong by leveraging perception, learned convention, or perceived control-effect relationships. Weaker than physical constraints, but available where physical constraints aren't.
## The three subtypes (from the book)
### Symbols
Communicate meaning through language and imagery. Examples:
- A skull-and-crossbones on a poison bottle.
- A "WET FLOOR" sign.
- A red traffic light.
- A trash icon on a delete button.