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© itemis AG
Findings from Usability Tests
Tested application: Xtext New Project Wizard
Date of test: 04.12.2016, Version: Xtext since v2.9
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© itemis AG
Summary
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© itemis AG
• Reason for the usability tests was the discussion in GitHub:
[wizard] Improve usability of Generic IDE Support option #119
https://github.com/eclipse/xtext-eclipse/issues/119
• Goal of the test was to compare three different possible solutions of the advanced Xtext
configuration wizard. The solutions were created as mockups.
• We conducted usability tests to get feedback regarding the three solutions:
• 5 testers performed different tasks with the configuration editor
• Duration of the tests: 15 minutes
Usability findings for Xtext New Project Wizard
Summary
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© itemis AG
Version 1 – Original wizard
The option „Generic IDE Support“ is
mandatory for the options „Eclipse
Plugin“, „IntelliJ IDEA Plugin“ and „Web
Integration“.
If one of the three options is selected, a
hint is shown with a quick fix to enable
„Generic IDE Support“. The user must
either click on the quick fix link in the hint
or select the checkbox.
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© itemis AG
Version 2 – Automatic selection
The option „Generic IDE Support“ is
mandatory for the options „Eclipse
Plugin“, „IntelliJ IDEA Plugin“ and „Web
Integration“.
If one of the three options is selected,
„Generic IDE Support“ is directly selected
and the checkbox disabled. A hint is
shown explaining why.
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© itemis AG
Version 3 – Hierarchies
The option „Generic IDE Support“ is
mandatory for the options „Eclipse
Plugin“, „IntelliJ IDEA Plugin“ and „Web
Integration“.
Thus, „Generic IDE Support“ it is at higher
level. The three checkboxes below are
only enabled if „Generic IDE Support“ is
selected.
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© itemis AG
General:
 Version 2 was rated best
 Version 1 was rated worst
Three most important findings:
• With version 1 and 3 the most usability problems occurred
• The current interface structure is error-prone as the hint does not really support to see the
dependency between “Generic IDE Support“ and the options „Eclipse Plugin“, „IntelliJ
IDEA Plugin“ and „Web Support“.
• Meaning of terms „Generic IDE Support“ and „Source Layout“ was not clear
Overview on results
Summary
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© itemis AG
Study design
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© itemis AG
ID Experience with Xtext
Experience with
Project Wizard
P1
Low. Took part in trainings but has not worked on an own
project.
None.
P2 None. None.
P3 None. None.
P4 Medium. Used it some years ago. None.
P5 Medium. Used it some years ago. None.
Participants
 All participants are developers
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© itemis AG
First, the testers got the original version of the wizard and were asked what the different terms mean.
Afterwards they had to rate how sure they are regarding their answer.
Then they performed a task with all versions (sequence of versions varied). We used the „Think
Aloud“ method: all participants explained what they do and think while executing the task.
Tasks (with each version):
• „Please configure a new Xtext project. Please assume for the following task that you want to
create a new Xtext project that includes support for an eclipse editor frontend.“
• Questions asked after performing the task with a version:
- What was your impression regarding the dialogue?
- Does the dialogue support you in choosing the right options?
• Post session questions (after all three versions were tested):
• Which dialogue supports you best in fulfilling the task? Why?
Which dialogue was worst in supporting you? Why?
Which suggestions for improvement do you have?
Use of New Project Wizard
Test scenario
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© itemis AG
Results
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© itemis AG
Severity
Cosmetic – inconsistencies, visual problems, problems with content
Positive – What was good, easy, intuitive
Minor – confused user, task cannot be solved fastly
Major – user has problems to fulfill the task, needs a lot of time and steps to reach goal
Blocker – user cannot solve task, cancels tasks
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© itemis AG
1.: What is the meaning of…
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© itemis AG
Version 1 – Meaning of „Eclipse Plugin“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
An eclipse version Wrong 4 P1
You get an eclipse plugin based on what you did
with Xtext. It is available in the runtime.
Correct 1 P2
Means that I want to include my Xtext project in
eclipse.
Correct 2 P3
You can create an eclipse plugin that you can re-
install in another eclipse IDE.
Correct 2 P4
The eclipse IDE integrated Xtext plugins will be
generated.
Correct 1 P5
 Most users are very sure regarding their answer and answered correctly.
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© itemis AG
Version 1 – Meaning of „IntelliJ IDEA Plugin“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
Configuration and use of the project in
IntelliJ (or access to the project)
Partly 3 P1
You get an IntelliJ plugin based on what
you did with Xtext. It is available in the
runtime.
Correct 1 P2
Means that I I want to include my Xtext
project in IntelliJ.
Correct 1 P3
Extention for IntelliJ that can be
integrated.
Correct 2-3 P4
The necessary Glue code (probably in
addition to core plugin) will be generated
to integrate it in IntelliJ.
Correct 1 P5
 Most users are sure regarding their answer and answered correclty.
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© itemis AG
Version 1 – Meaning of „Web Integration“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
Integration of Xtext in a website. Partly 4 P1
You generate components (client and
server) that can be used in a web
context.
Correct 1 P2
Integration of some kind of web access. Correct 2 P3
You can use the DSL that is
implemented also in web.
Correct 2 P4
An orion based editor will be created. Partly 2 P5
 Most users are sure regarding their answer. They answered correctly or partly correct.
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© itemis AG
Version 1 – Meaning of „Generic IDE Support“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
No idea -/- 1 P1
Not sure, maybe a third type of IDE or for
runtime without IDE
Wrong 5-6 P2
That it is supported from my environment.
Don‘t know how to describe.
Wrong 3-4 P3
No idea. -/- 1 P4
Connection to language server protocol or
a generic editor.
Correct 3 P5
 Meaning of „Generic IDE Support“ is not clear for participants: either they had no
idea or they were not sure regarding their answer.
 Problematic as this is mandatory for some of the other possibilities
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© itemis AG
Version 1 – Meaning of „Testing support“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
Include a test runner or a test environment. Correct 3 P1
Test classes for developed DSLs. However,
tests are always necessary so not sure why
to have it as separate aspect.
Correct 5 P2
To see how my project is tested and that I
know who tested what when.
Wrong 2 P3
Provides JUnit (etc.) with different test
cases.
Wrong 3 P4
Creation of test bundles in addition to
productive bundles.
Correct 2 P5
 Users are not really sure what this means and only some answered correctly.
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© itemis AG
Version 1 – Meaning of „Preferred Build System“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
Somethink such as Gradle, Maven, Ant. Correct 2 P1
Maven etc to generate the corresponding
artifacts.
Correct 1-2 P2
That I can choose between the different
systems in the dropdown when I build my
project.
Wrong 4 P3
Maven, Ant, Gradle Correct 2 P4
Which build system I will use (e.g. only
build it in eclipse or with Gradle or Maven).
Correct 1 P5
 Most users are sure regarding their answer and answered correctly.
19
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© itemis AG
Version 1 – Meaning of the terms: „Source Layout“
Answer Correctness
How sure are you?
(1-6; 1 = very sure)
ID
Components that should occur in a project
(alternatively, you get an empty project).
Source layout is the file in which you do the
configuration.
Wrong 2 P1
Structure of the source code. Wrong 4 P2
If the interface of the IDE is multilayered or
single-layered. Is necessary to configure the
project hierarchy.
Wrong 4 P3
Not sure if this affects generated code or the
source that describes the DSL.
Wrong 4 P4
Don‘t know if this concerns the build system
or the eclipse project or some content.
Wrong 2 P5
 Most users are not really sure what this means. All answered wrong.
20
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© itemis AG
2.: Which dependencies do you see
between the different options?
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© itemis AG
Version 1 – Dependencies between options
Answer
How sure are you?
(1-6; 1 = very sure)
ID
Not really sure. I do not understand the dialog in a way that some
facets exlude others. I think I can use them idenpendently.
1 P1
It depends if the selected IDEs support a specific build system.
The other options are independent.
-/- P2
Create Feature and Create Update Site depend on Eclipse
Plugin. For the other options I cannot see that there are
dependencies.
1 regarding Create…
5 for rest
P3
Create Feature and Create Update Site depend on Eclipse
Plugin. For the other options I cannot see that there are
dependencies.
1 P4
IntelliJ and Web Integration are independent from eclise
possibilities. Not sure if core plugins are also generated as
Eclipse plugins if I will not choose Eclipse plugin.
3 P5
 The current interface structure does not show that „Generic IDE Support“ is mandatory for
the options „Eclipse Plugin“, „IntelliJ IDEA Plugin“ and „Web Support“
22
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© itemis AG
3: Task: Configure a new Xtext project that includes
support for an eclipse editor frontend.
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© itemis AG
Issues concerning version 1 - Original
Didn‘t expected dependencies between
„Eclipse Plugin“ and „Generic IDE Support“
because of layout (P2, P5).
Does not like that he has to click on the link
in the error message (P2).
Expected that „Generic IDE Support“ is
selected automatically (P2).
Sees hint but was not sure if this means that
he has to check „Generic IDE Support“ (P3)
Liked that the checkmark was not set
automatically and that you have the choice
(P4) -> however, didn‘t understood that
this is necessary
24
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© itemis AG
Issues concerning version 2 – Automatic selection
Liked that checkmark for „Generic IDE
Support“ is created automatically
(P1, P3, P4, P5).
Likes that there is no unnecessary hint
saying what he has to do (P3).
Good that mandatory option cannot be
deactivated (P5).
Structure does not show dependency (P5).
Hint should be placed directly at „Generic
IDE support“ when it is disabled (P5).
25
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© itemis AG
Issues concerning version 3
Wanted to select „Eclipse Plugin“ but was not
possible as it was deactivated („Generic IDE
Support“ was not selected). Was confusing
(P1, P2)
The layout implied the tester that he must
select one of the three sub-options, too and
that it is not possible to use „Generic IDE
Support“ only (P2)
Layout shows dependency between
„Generic IDE Support“ and „Eclipse Plugin“
(P3, P4, P5)
Layout shows that there is no dependency
between the IDE issues and Testing Support
(P5)
Tester didn‘t see „Eclipse plugin“ because it
was disabled first (P3)
Unclear structure compared to other
dialogues (P4).
Two clicks are necessary to activate „Eclipse
Plugin“ (P4)
26
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© itemis AG
4.: Which dialogue supports you best?
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© itemis AG
Which dialogue is the best?
Answer ID
Version 3. However, I also liked version 2 as necessary options are automatically selected. P1
Version 2 P2
Version 2 but version 3 was also good. P3
Version 2. Checkmark was done automatically and there was a feedback why this is the case. P4
Version 3. Shows dependencies in layout. P5
 According to the users version 2 supports them best, followed by version 3.
 Also when comparing the usability problems of version 2 and 3, version 2 supports
best.
28
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© itemis AG
Which dialogue was worst?
Answer ID
Version 1 because of the error message. P1
Version 1. P2
Version 1. Error message can be overlooked easily. Message confuses what needs to be done. P3
Version 3. Structure too unclear. P4
Version 1. P5
 Version 1 supports worst.
29
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© itemis AG
Further improvements
Answer ID
• Tooltips should explain the different options in the dialogue (e.g. what does Testing
Support mean).
P1
-/- P2
• Hint messages should be bigger.
• Nobody wants to read hints.
P3
-/- P4
• Description of options as they are not self-descriptive (e.g. when hover them)
• An information is necessary that always a basis is generated and that facets can be
added optionally.
• Terms are not consistent (sometimes „support“ sometimes „plugin“)
P5
30
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© itemis AG
Summary of results
• The results show that version 2 should be realized
• In addition:
• Add tooltips that explain the different options
31

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