CS444/CS544 Operating Systems History & Development 1/15/2007 Prof. Searleman [email protected].
ZenFox CS544 2009F Project Phase III
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Transcript of ZenFox CS544 2009F Project Phase III
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ZenFoxCS544 2009F Project Phase III
The Tab FourLam, Billy
MacKenzie, RussR, Mohan
Su, Tao
A task-focused web browser
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Agenda
ProblemRedesignImplementationEvaluation ProcedureResultsDemo + Video
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ProblemSupport for multi-session tasks
Minutes Hours Days Weeks Months Years
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
Percentage of users
Time before task resumption (Survey from SearchBar: Morris et al, 2008)
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Problem
Current coping strategies for task resumption (Survey from SearchBar: Morris et al, 2008)
Strategy Respondents
Active Storage / Active Retrieval
55.00%
Written or typed notes 30.00%
Browser bookmarks 26.00%
Save Web pages locally as files 5.30%
E-mail to self 2.40%
Online bookmarks/tagging 1.80%
Print Web pages 0.60%
Passive Storage / Active Retrieval
8.20%
Browser history 7.60%
Online query history 1.20%
Passive Storage / Passive Retrieval
49.00%
Memory 36.00%
Leave browser open 14.00%
Link coloring 2.40%
Autocomplete 2.40%
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Problem
Current coping strategies for task resumption (Survey from SearchBar: Morris et al, 2008)
Strategy Respondents
Active Storage / Active Retrieval
55.00%
Written or typed notes 30.00%
Browser bookmarks 26.00%
Save Web pages locally as files 5.30%
E-mail to self 2.40%
Online bookmarks/tagging 1.80%
Print Web pages 0.60%
Passive Storage / Active Retrieval
8.20%
Browser history 7.60%
Online query history 1.20%
Passive Storage / Passive Retrieval
49.00%
Memory 36.00%
Leave browser open 14.00%
Link coloring 2.40%
Autocomplete 2.40%
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Problem
Information overload
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RedesignReview: A task-focused browser interface
Suspension and InterruptionAnnotationSharing
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RedesignLessons from Phase II
Paper prototype generally well-receivedExcitement about ideasGenerally kept all featuresTwo key points
. Default hiding of task management features
. Transparent sharing
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RedesignWorries about sharing feature
But still keen on easier sharing Originally just attach/send files
What if there’s an error? What if they can’t open it? What if versions change?
Software isn’t even written and already they don’t trust it!
Replaced with drag-n-drop and added cloud sharing
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Redesign
Drag&Drop
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Redesign
Drag&Drop
“The internet”
Share LoadEntire context is loaded!
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ImplementationFirefox plugin vs Flex prototype
Practical significance vs. practicality for CS544
Subset of features: vertical prototypeAnnotationSuspension and ResumptionSharing
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Implementation
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Evaluation ProcedureExtended use of prototype not feasible8 subjects, comparison with FireFox
Very minimal training session
Short (& intensive!) multi-tasking scenariosInterruptionSuspensionResumptionSharing
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Evaluation ProcedurePrimary Task
Trip planning with hypothetical friend“Mark” or “Jane” – same sex as subject
Communications through Email and IMInterrupts through IM
Add secondary tasksExtra details to primary task (sightseeing)Interruption of primary task (research papers)
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Evaluation ProcedureQuestionnaires and short discussion
Work load of assigned tasksImmediately after trial7 point Likert scale
Comparisons between browsers and general questionsAt end of session
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ResultsQuantitative analysis of dataNASA TLX-like
Used Wilcoxon test, Bonferroni corrected All task load questions non-significant, p > 0.1 Still, 6/8 rank TabFour higher for question:
“How effectively did the browser interface support what you were asked to do”?
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ResultsQuantitative analysis of dataOther questions mostly unanimous:
Which browser was easier to use to complete the tasks? -TabFour Did you find the task-based browsing useful? –Yes Would you use task-based browsing if it was available in your
regular web browser? –Yes
In which browser was it easier to share webpages with other
people? -TabFour
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ResultsQualitative feedback
Usability issue on Load/Share context dialog
More organized in TabFour Integration with existing tools desirable
Want to click links/task names in email
What if Mark gives me a bad link (typo)? “Simple, doesn’t require extra learning to use”
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ResultsQualitative feedback
“FireFox lets you see things all at once”
Benefits and costs more obvious in prolonged use?
“Task groups cut down on time needed to complete tasks”
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Demo + Video
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Questions?