Human Speed-Accuracy Tradeoffs in Search

Details Human Speed-Accuracy Tradeoffs in Search Human Speed-Accuracy Tradeoffs in Search

2010-08-27

arxiv.org/abs/1008.4820v1

Computer Science

Computers and Society

Scientific paper

When foraging for information, users face a tradeoff between the accuracy and value of the acquired information and the time spent collecting it, a problem which also surfaces when seeking answers to a question posed to a large community. We empirically study how people behave when facing these conflicting objectives using data from Yahoo Answers, a community driven question-and-answer site. We first study how users behave when trying to maximize the amount of acquired information while minimizing the waiting time. We find that users are willing to wait longer for an additional answer if they have received a small number of answers. We then assume that users make a sequence of decisions, deciding to wait for an additional answer as long as the quality of the current answer exceeds some threshold. The resulting probability distribution for the number of answers that a question gets is an inverse Gaussian, a fact that is validated by our data.

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