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61 lines
1.2 KiB
Markdown
61 lines
1.2 KiB
Markdown
---
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title: "direct-manipulation-video"
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aliases:
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tags:
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- info203
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- video
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---
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e.g., better measuring cup
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ford qquote about faster horse
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four insights
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- both transit and cookware simply asking doesn't work
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- find out by going into the field
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- bring protoypes with you
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- listen to peoples own designs
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two steps each has success or failure
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- action --> gulf of execution
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- evaluating the outcome --> gulf of evaluation
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6 questions
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- determine the function
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- tell what actions
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- determine actual action
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- perform the actions
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- tell what state
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- mapping from system state and interpretation
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to reduce gulfs
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- visibility (perciebves affordances or signifiers)
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- feedback
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- consistency (standards)
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- non-destructive operations (undo/redo)
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- discoverability (operations discovers by exploration)
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- reliability
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e.g., vending machine example
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# Command line vs GUI
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e.g., moving a file
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gui - have continuous feedback
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cmd - have to know syntax, almost no feedback
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direct manipulation
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- immdediate feedback
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- continuous represntations of objects
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- leverage metaphor (take advangates of pre-existing knowledge)
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successful indirection. cmd provides generalisation
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eye to the future: gestures
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- solutions to menu creep?
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- even more direct?
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