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Published byAldous Stanley Modified over 9 years ago
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Interaction Design Chapter 10
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The Human Action Cycle Psychological model Describes steps users take to interact with computer systems Use actions and tasks to achieve goals
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The Human Action Cycle Goal Formation Execution stage – Translate goals into tasks – Planning the action sequence – Executing action sequence Evaluation stage – Perceiving what's happening – Interpreting the outcome as per expectations – Comparing what happened with what was wanted
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Human Action Cycle Can be quick or fast Can be broken down into smaller Human action cycles Flexible Differs from person to person
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Goal Formation One step Think of a goal
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Execution Stage Involves thinking and action Thinking – Translate goals into tasks – Planning the action sequence Action – Executing action sequence
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Evaluation stage All thinking Comparing expectation with result
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HAC Influence on the Design Process Predict difficulties Changes to environment and technology Skills and training
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Explaining the System to the User The user has to understand the UI The user uses Prior knowledge Documentation Training We use – Designer and User model, and the System image
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Designer Model What the designer knows Structural and operational Complete and clear
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User Model What the user knows Functional Sometimes incorrect
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System Image Communicate design to user Contains – UI – Documentation – Training – What the user knows
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UI and the User Needs to meet the user model’s expectation Needs to meet the functionality of the designer model Take into account older user models
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Metaphor Technically all computer UI’s Used to make an accurate user model Used to unify UI
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Problem’s with Metaphors Adhering too strictly Outside user experience Make sure all metaphors connect
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Making a metaphor Task scenarios, use cases, requirements gathering Make sure makes sense to user Make several
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Questions?
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