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Usability Test Results Xtext New Project Wizard

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Sandra Schering

A discussion in GitHub concerning the new project wizard of an Xtext project was the origin for a usability test in which three versions of the wizard were compared. The slides show the study design and the usability findings.

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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
                                                                  © itemis AG Summary
                                                                  © 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 3
                                                                  © 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. 4
                                                                  © 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. 5
                                                                  © 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. 6
                                                                  © 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 7
                                                                  © itemis AG Study design
                                                                  © 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 9
                                                                  © 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 10
                                                                  © itemis AG Results
                                                                  © 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 12
                                                                  © itemis AG 1.: What is the meaning of…
                                                                  © 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. 14
                                                                  © 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. 15
                                                                  © 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. 16
                                                                  © 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 17
                                                                  © 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. 18
                                                                  © 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
                                                                  © 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
                                                                  © itemis AG 2.: Which dependencies do you see between the different options?
                                                                  © 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
                                                                  © itemis AG 3: Task: Configure a new Xtext project that includes support for an eclipse editor frontend.
                                                                  © 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
                                                                  © 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
                                                                  © 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
                                                                  © itemis AG 4.: Which dialogue supports you best?
                                                                  © 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
                                                                  © 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
                                                                  © 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
                                                                  © 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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