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Types of Errors in Design
There are 2 types of errors:
slips(a person intends to do an action and ends up doing something else). Can be:action-based(correct action applied to the wrong object),memory-lapse(forgetting)mistakes(wrong goal or wrong plan formed). Can be:rule-based(correct diagnose, wrong action),knowledge-based(incorrect diagnose),memory-lapse(failing due to distraction)
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The 3 Levels of Processing that inform the 3 Stages of Action
There are 3 levels of processing that inform the action a user does:
- visceral (lowest level, correlated with calm and anxiety). Actions: perform and perceive.
- behavioural (middle level, correlated with expectations and emotions). Actions: specify and interpret.
- reflective (highest level, correlated with satisfaction). Actions: plan and compare.
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The fundamental concepts of Interaction
Affordances - the relationship between the properties of an object and the capabilities of an agent
Signifiers - an indicator that communicates appropriate behaviour to a person
Constraints - impediments of using a system
Mappings - the relationship between the elements of two sets of things
Feedback - communication of the results of an action
Conceptual model - explanation of how something works
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2 Innovation Forms
- Incremental - Continuous Testing and Refinement. Starts from an existing product. Called also Hill Climbing (move your foot in one direction - if it is uphill, take one step. If not, change direction. Do that until the top of the peak). Con: cannot find a higher hill.
- Radical - Starts fresh, many times from scratch. Offers potential very high opportunities. Con: the hill might be even lower than the one previously tried.
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The more things change, the more they are the same.
JEAN BAPTISTE ALPHONSE KARR
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User Researcher, passionate about behaviours and building the right products. I 'stash' about research, self-development and education.
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