user experience metrics Flashcards

1
Q

what is the point of user experience metrics

A

allows you to improve and compare designs
can assess whether your product is better than the competition

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2
Q

what do ux metrics measure

A

usability utility ux

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3
Q

what are some criteria for usability

A

efficiency
effectiveness
satisfaction
learnability
memorability
errors

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4
Q

learnability

A

how easy it is to complete goals during first time use

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5
Q

memorability

A

how easy is it to continue using the system when you haven’t used it in a while

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6
Q

effectiveness

A

how well and completely users can achieve their goals

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7
Q

efficiency

A

the time and effort required to achieve goals

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8
Q

satisfaction

A

how users feel about the experience

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9
Q

errors

A

how many how sever and are they easily recoverable

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10
Q

usability metrics

A

measurements taken relative to user performed tasks

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11
Q

what are 4 usability metrics

A

success rate
time taken
error rate
user subjective satisfaction

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12
Q

performance measures

A

task based and relies on clearly defined criteria

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13
Q

learning curve

A

describes how performance of SKILLED BEHAVIOUR increases with practice

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14
Q

4 basic metrics of performance measures

A

task success
errors
time on task
clicks/actions

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15
Q

task success

A

measures effectiveness with a clear pass and fail criterea

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16
Q

task success rate

A

% of users who succeed

17
Q

eg of pass fail criteria

A

giving up
moderator calls it
timeout
completed but wrong

18
Q

errors

A

event based can be counted
have to decide what counts as an error

19
Q

e.g. of something that could count as an error

A

wrong choice
key action not taken
data entry error

20
Q

error rate

A

average number of errors per task

21
Q

time on task

A

measures efficiency with a defined start and stop
has variations so should conduct multiple trials and get an average

22
Q

clicks/actions

A

measures efficiency via the effort needed to complete a task
can compare the number of actions taken vs the minimum actions required

23
Q

user reported measures

A

provide quantitative feedback via standardised questionnaires and rating scales

24
Q

post task questionnaires

A

rate experience after each task to compare tasks

25
post test questionnaires
rate the experience after completing all tasks in the system in order to compare systems
26
what is an example of a post task questionnaires
single ease question(seq); has a rating scale
27
what is an example of a post test questionnaires
system usability scale(sus); 10 statements with a scale then combined to make a sus score out of 100
28
levels of measurement
the relationship amongst attributes
29
variable
anything measured in a study
30
attribute
a possible value of a variable
31
what are the 4 levels of measurement
nominal ordinal interval ratio
32
norminal
attributes have names but no relationships
33
ordinal
attributes are ordered
34
interval
distance between possible values is meaningful
35
ratio
ratios are meaningful