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05 attention
 

05 attention

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  • Salience - contrast – especially motion or color contrastNewness – abrupt onset, appearance of something new on the sceneAttentional set – if person is searching for it or is otherwise prepared to let it grab attention
  • If a channel has a high event rate, people will sample that more frequently than if it had a low event rate – something that is frequently updated gets visual visits more often than something that is static or updates more slowly – think car gauges, we sample spedometer more often than engine temperature.Contextual relevance – the context of events that have happened there previously suggest that information is now available there. There is a cue that there is information there – usually an alarm or indication.Info value – the expected value to be gained, or lost, if the info is not noticed

05 attention 05 attention Presentation Transcript

  • The DesignHCI human Process factor
  • starwars.wikia.com
  • Memory• Long term memory: Learning• Short term memory• Working memory
  • AttentionUnderstanding attention processes Note to self see - http://www.useit.com/alertbox/tunnel-vision.html What is attention?
  • AttentionUnderstanding attention processes Why is attention relevant to interface design?
  • Spotlight metaphor What makes the spotlight move?Visualogist on flickr
  • Attention ControlTop-down Bottom-up
  • Attention ControlTop-down Driven by: Expectation Intention Bottom-up
  • Attention ControlTop-down Captured by: Salience Newness Facilitated by: Person’s Bottom-up attentional set
  • vVisual Scanning s Visual Search
  • vVisual Scanning s Visual Search
  • Visual ScanningInfluenced by6 factors: 1 Habit 2 Attention capture 3 Info content: Event rate 4 Info content: Contextual relevance 5 Information value 6 Effort conservation
  • Visual ScanningProbability of looking at an area: Salience Effort Expectancy Value
  • vVisual Scanning s Visual Search
  • Visual SearchThe effort to detect a target itemwhose presence or position inthe field is not known a priori.
  • TargetWell-specified Vague Top-down Bottom-up
  • FieldStructured Predictable Haphazard In which type of field is it easier to find a target?
  • Facilitating Visual SearchHow can we design interfacesso it’s easier for people to find what they need?
  • A target is easier to find if… It is salient. It is novel or unfamiliar among familiar items. It possesses a unique feature rather than lacking it.* It (not the distractors) deviates from a default value.* Only one target needs to be sought at a time.
  • Presence/Absence of Unique Feature
  • Deviation from default value| | | | | | | | | | | | || | | | | | | | | | |
  • Summary Attentional Control  Top-down vs. Bottom-up Visual Scanning  6 factors that influence it Visual Search  Target  Field  Facilitating it Amazon.com