Measuring usability workshop
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Transcript of Measuring usability workshop
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Measuring Usability
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Hi I am Stefan
Senior UX Architect at Infragistics
UI controls for desktop, web and mobile
Developer productivity tools
Teach and talk about UX
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UX has taught us a lot
Are there any User Researchers in the room?
How many of you have ever prototyped?
Among these are there some who usually start prototyping early on?
Are there any “exceptionals” who got feedback on their prototypes from real users, not
stakeholders of colleagues?
“UX is not order taking”
Kevin Richardson
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Evaluation
Model extraction
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Evaluation
Model extraction
Silent observation
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Evaluation
Model extraction
Silent observation
Think aloud
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Evaluation
Model extraction
Silent observation
Think aloud
Constructive usage
Retrospective testing
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Evaluation
Model extraction
Silent observation
Think aloud
Constructive usage
Retrospective testing
Controlled experiments
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CONTROLLED EXPERIMENTS
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Synthesizing a hypothesis
Statement
Short and specific
Assuming some kind of relationship
It should be testable
Accept it or reject it
Generalizes over a group of users
Often uses passive voice
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Synthesizing a hypothesis - examples
If leaf color change is related to temperature, then exposing plants
to low temperature will result in changes of leaf color.
Hyperactivity is unrelated to eating sugar.
A person’s preference for a shirt is not related to its color.
If I replace the battery in my car, then my car will get better gas mileage.
Water levels affect the amount of lice suffered by rainbow trout.
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Synthesizing a hypothesis
In the field throughout the day
Communicate with colleagues and management via various means
Send status updates for various crops
Repetitive reports take up quite some time
Agriculture is error intolerant (direct impact on harvest and profit)
Communicate with multiple people while at a certain stop
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Null hypothesis
The accuracy of information and time to gather and send a status
report for the crops are independent of the means of communicating
the report, the crops outlined and the number of people that need to
be informed.
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Null hypothesis
The accuracy of information and time to gather and send a status
report for the crops are independent of the means of communicating
the report, the crops outlined and the number of people that need to
be informed.
Independent variables
Controlled variables
Dependent variables
Measured variables
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Experiment concept
Task 1 …………………………………………………………………….
Send the following status update “Draught has
affected oats in C012 field” via text to Manoj,
Deepak and Divya
Send the following status update “Rice in B039
field is robust and healthy” to Rohit by calling him
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Experiment concept
Means of communicating
Type of crops
Number of people
#Conditions = #Means of communicating * #People
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Experiment concept
Error rate
Rate of corrections
Task completion time
Accuracy of information
Time to send a status
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Executing the study
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Analyzing the data
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Further learning
https://www.r-project.org/
http://randomization.com/
https://stats.idre.ucla.edu/other/mult-pkg/whatstat/
What statistical analysis to use cheat sheet
Randomization to avoid learning effects
R-project for running statistical analysis
https://stats.idre.ucla.edu/r/whatstat/what-statistical-analysis-should-i-usestatistical-analyses-using-r/
https://stats.idre.ucla.edu/stata/whatstat/what-statistical-analysis-should-i-usestatistical-analyses-using-stata/
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Remote usability studies
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PreparationCreate an account under indigodesigned.com
Email [email protected] get an invite to the shared workspace with the prototype
Create your own usability study by extending the prototype and defining your own tasks
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Execution
https://indigodesigned.com/study/run/h1170y563x3r/
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Participation
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Remote usability studies
