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Slow Search. Jaime Teevan, Kevyn Collins-Thompson, Ryen White, Susan Dumais and Yubin Kim. Slow Movements. Speed Focus in Search Reasonable. Not All Searches Need to Be Fast. Long-term tasks Long search sessions Multi-session searches Social search Question asking
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Slow Search Jaime Teevan, Kevyn Collins-Thompson, Ryen White, Susan Dumais and Yubin Kim
Not All Searches Need to Be Fast • Long-term tasks • Long search sessions • Multi-session searches • Social search • Question asking • Technologically limited • Limited connectivity • Mobile devices • Search from space
Time + Search Understand how time influences the search experience
Time in Search: Micro Scale • Impact of sub-second changes in response time • Study using large-scale query log analysis • Natural variation exists within a single query • Measure interaction as f(response time) • Time to click • Abandonment rate
Impact of Sub-Second Changes • Imperceptible changes impact behavior • Impact of slower page load time • Slower time to click • Increased abandonment • Some queries more sensitive to time than others • Time impacts navigational queries > informational • Informational queries less impacted by very slow results
Time in Search: Macro Scale • Impact of longer changes in response time • Two user surveys with 1476 participants in total • Detailed survey with 141 MSFT employees • Online survey with 1335 people • Asked about the participant’s last search • Willingness to wait for results as f(response time)
Time Constraints in Search • Reported spending more time on some searches • Important tasks • Tasks with a deadline • Tasks with bad search results • Time constraints • 34% of tasks needed results urgently • 39% of tasks needed results by a deadline • 27% of tasks needed results whenever
Willingness to Wait • Time willing to wait < actual time spent searching • Participants do not trust the search engine • 28% people said they want “fast results always” • For important tasks • Spent more time searching than less important • Willing to wait less than less important
Impact of Longer Intervals of Time • People do not want to wait, but… • Report spending a lot of time on important tasks • 90% of the important tasks took more than 1 minute • 23% of respondents found their results unacceptable • Are willing wait in some cases • When the results obtained were poor • When a perfect answer is sought
Questions? Jaime Teevan teevan@microsoft.com Yubin Kim yubink@cmu.edu