Download - Web Usability Metrics JSNext Bulgaria 2014
Nov 23, 2014Nov 23, 2014
Sofia
var title = “Web Usability Metrics”;
var info = {
name: “Stefan Ivanov”,
};
Nov 23, 2014
Stefan Ivanov
Stefan Ivanov Web Usability Metrics
• Human-Computer
Interaction
• UX Educator
• UX Architect
Nov 23, 2014
agenda();
• Measuring Usability
• Perceived Subjective Usability
• Automated Usability Measurements
• Usability Strategy Design
Stefan Ivanov Web Usability Metrics
Nov 23, 2014
Measuring UsabilityWhy, What and How
Nov 23, 2014
Measuring Usability
• Test metaphors
• Test interactions
• Check user flows
• Verify requirements
• Test menu navigation
• Validate user needs are met
• Impact on user performance
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Conversion
• Brand attribute
• Conversion rate
• Micro-conversion count
• Likelihood to recommend
• Likelihood to take action
• Repeat visitors
• Trust rating
Engagement
• Time on website
• Happiness rating
• Flow state
• Total time reading
• First impression
• Categories explored
• Page view & clicks
Measuring “Usability”
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Measuring Usability
• Task success
• Cue recognition
• Perceived success
• Confusion moment
• Menu/Navigation use
• Back button usage
• Time on task
• Error rate
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Perceived Subjective
UsabilityThe value of user feedback through surveys
Nov 23, 2014
Perceived Subjective Usability
• SEQ
o Single Ease Question
• SUS
o System Usability Scale
• SUPR-Q
o Standardized User Experience Percentile Rank
Questionnaire
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Single Ease Question
Web Usability MetricsStefan Ivanov
• One question
• One answer
Nov 23, 2014
System Usability Scale
• Survey with ten questions
• Likert scale answers
• Usability + Learnability
• Works with small samples
• Usable or not
• 51-68-80
Web Usability MetricsStefan Ivanov
Nov 23, 2014
SURP-Q
• Standardized survey with 13 questions
• Likert scale answers
• Usability-Credibility-Loyalty-Appearance
• Percentage that relates you to others
• One special question
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Automated Usability
MeasurementsMeasuring the design and tweaking its performance
Nov 23, 2014
Target acquisition tasks
• Task completion times
• Acquisition accuracy
• Acquisition path
• Error rates
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Navigation tasks
• Completion times
• Navigation path
• Decision times
• Error rates
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Eye tracking
• First glance
• Search patterns
• Icon applicability
• Decision making process
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Single Usability Metric
Task Completion Rate
+
Task Times
+
Task Difficulty (errors)
+
Satisfaction
• 65% (with confidence interval)
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Usability Strategy DesignBuilding the big vision with a clear goal
Nov 23, 2014
My recipe
• Answer the WHY
Web Usability MetricsStefan Ivanov
Nov 23, 2014
My recipe
• Answer the WHY
• Answer the WHAT
Web Usability MetricsStefan Ivanov
Nov 23, 2014
My recipe
• Answer the WHY
• Answer the WHAT
• Start retrospectively
Web Usability MetricsStefan Ivanov
Nov 23, 2014
My recipe
• Answer the WHY
• Answer the WHAT
• Start retrospectively
• Measure objectively
Web Usability MetricsStefan Ivanov
Nov 23, 2014
My recipe
• Answer the WHY
• Answer the WHAT
• Start retrospectively
• Measure objectively
• …and ask subjectively
Web Usability MetricsStefan Ivanov
Nov 23, 2014
My recipe
• Answer the WHY
• Answer the WHAT
• Start retrospectively
• Measure objectively
• …and ask subjectively
• It is not a one time effort
Web Usability MetricsStefan Ivanov
Nov 23, 2014
Useful links
https://www.linkedin.com/in/stefanivanovux
http://www.measuringu.com/blog/single-question.php
http://www.measuringu.com/article.php?uname=SUM
http://www.measuringu.com/suprq.php
http://www.suprq.com/
http://www.measuringu.com/sus.php
http://humansystems.arc.nasa.gov/groups/TLX/
Stefan Ivanov Web Usability Metrics
Nov 23, 2014
Upcoming events
ISTA Conference 26-27 November
http://istabg.org/
Stay tuned for 2015:
Azure Bootcamp http://azure-camp.eu/
UXify Bulgaria http://uxify.org/
SQLSaturday https://www.sqlsaturday.com/
and more js.next();
Nov 23, 2014
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