Interaction Design - Clemson University

Interaction Design Chapter 10 The Human Action Cycle Psychological model Describes steps users take to interact with computer systems Use actions and tasks to achieve goals

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

Human Action Cycle Can be quick or fast Can be broken down into smaller Human action cycles Flexible

Differs from person to person Goal Formation One step Think of a goal

Execution Stage Involves thinking and action Thinking Translate goals into tasks Planning the action sequence

Action Executing action sequence Evaluation stage All thinking Comparing

expectation with result HAC Influence on the Design Process Predict difficulties Changes Skills to environment and technology

and training 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 Designer Model What

the designer knows Structural and operational Complete and clear User Model What

the user knows Functional Sometimes incorrect System Image Communicate design to user

Contains UI Documentation Training What the user knows

UI and the User Needs to meet the user models expectation Needs to meet the functionality of the designer model Take

into account older user models Metaphor Technically all computer UIs Used to make an accurate user model Used

to unify UI Problems with Metaphors Adhering Outside Make too strictly user experience

sure all metaphors connect Making a metaphor Task scenarios, use cases, requirements gathering Make sure makes sense to user

Make several Questions?

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