“towards time design: pacing of hypertext navigation by system response times”
DESCRIPTION
Performance, Residence time. System Response Time. “Towards Time Design: Pacing of Hypertext Navigation by System Response Times”. Michael Hildebrandt [email protected] HCI Group Dept. of Computer Science University of York, UK. Herbert A. Meyer [email protected] artop Institute - PowerPoint PPT PresentationTRANSCRIPT
“Towards Time Design: Pacing of Hypertext Navigation by System Response Times”
CHI 2002, Minneapolis, MN
Michael [email protected]
HCI GroupDept. of Computer Science
University of York, UK
Herbert A. [email protected]
artop InstituteHumboldt-University Berlin
Germany
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System Response Time
Towards Time Design: Pacing of Hypertext Navigation by SRT
System Response Time: PerceptionsStimulation is the indispensible requisite for pleasure in an experience, and the feeling of bare time is the least stimulating experience we can have - William James
Nothing can be more useful to a man than a determination not to be hurried - Henry D. Thoreau
System Response Time: PerspectivesQoS notions: Beyond Faster is Better
Design: Enjoyable interfaces, flow, temporal affordances
Research: Cognitive psychology of time
System Response Time: Previous researchStress at long SRT (esp. intra-task) – 3 sec threshold?
Agitated work style at short SRT
Pacing of residence time by SRT
CHI 2002, Minneapolis, MN
CHI 2002, Minneapolis, MN
Towards Time Design: Pacing of Hypertext Navigation by SRT
Experiments: Research questionsPacing in exploratory HT navigation
Performance effects of pacing
Annoyance threshold
Intra- and inter-task effects
MethodFree navigation in hypertext catalogue
Independent variable: Between-subjects SRT (0.75s – 3.75s)
Dependent variable: Residence time
Pre / post mood rating scale
Incidental recognition test
CHI 2002, Minneapolis, MN
Towards Time Design: Pacing of Hypertext Navigation by SRT
Vertical navigation
Horizontal navigation
Index level
Preview level
Full-size level
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Material: Hypertext photo catalogue
CHI 2002, Minneapolis, MN
Towards Time Design: Pacing of Hypertext Navigation by SRT
CHI 2002, Minneapolis, MN
Towards Time Design: Pacing of Hypertext Navigation by SRT
Results
Study 1 Study 2
Pacing (intra- / inter-task)
Threshold ~3s
Increased annoyance > 3s Pacing (intra- / inter-task)
No threshold, no annoyance
Recognition U-curve
CHI 2002, Minneapolis, MN
Towards Time Design: Pacing of Hypertext Navigation by SRT
ConclusionPacing in low-demand, free navigation
Intra- and inter-task effects
Performance deficits at fast SRT
Interpretation: Attention? Motivation? Dissonance?
Future directionsCognitive time design: Introduce decision costs via SRT
Promote thorough work style – application in engineering?
Enjoyable interfaces, flow, temporal affordances
Field study: Educational web applocation (learning game)
Get in touch!Michael Hildebrandt, [email protected]
Herbert A. Meyer, [email protected]