eye tracking in usability
DESCRIPTION
A guide by Tommy Standvall from Tobii showing ho eye tracking is very useful and powerful for insights in usability studies.TRANSCRIPT
Eye Tracking on the web Tommy Strandvall
Tobii Technology
What do we actually see?
The 1-2º large area of foveal vision is about the size of a thumbnail on an arm lengths distance
The fovea is less than 1% of the retina but takes up over 50% of the visual cortex in the brain.
Peripheral vision is mainly good at picking up movements and contrasts
Fixation
The area of foveal vision
Saccade
Why eye-tracking?
Clear additional insights into behavior Measurable behavior: data (numbers), images, videos Objective data on behavior Very visual results for better understanding Persuasive results
When is eye-tracking valuable?
When combined with other methods When the main goal is to improve the design of an interface If you have clear questions you want to find an answer to When comparing different design alternatives In both qualitative and quantitative research When adapting an interface based on typical behavior
How eye tracking is used
As a complement in qualitative research to help describing behavior and supporting the findings
To show live to others what the user is experiencing As a complement or standalone method in quantitative
research to describe the typical user behavior In experimental research as the dependent variable
Different user groups of eye tracking
Eye tracking is the sprinkle on the icing Eye tracking is the icing Eye tracking is the cake
What can eye tracking tell you?
…WHY?
WHAT?
HOW?
If people don’t see it they won’t click on it…or do anything at all
VISUALIZING EYE MOVEMENTS
Scan path or gaze plot
Heat maps
Count
Duration
Gaze opacity
Where do we focus on the web?
Fixation count0,5 sec
Fixation count1 sec
Fixation count1,5 sec
Measure visibility and impact of banners
Time from fixation to click
2,8 sec2,8 sec28 sec28 sec TTF = Time to fixationTTC = Time to click
Visits and re-visits
Heatmap: Absolute duration
% seen
Time to first fixation
Final version