Accurate Measurements of Pointing Performance from In Situ Observations

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Accurate Measurements of Pointing Performance from In Situ Observations

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Title: Accurate Measurements of Pointing Performance from In Situ Observations
Author: Gajos, Krzysztof Z; Reinecke, Katharina; Herrmann, Charles

Note: Order does not necessarily reflect citation order of authors.

Citation: Gajos, Krzysztof, Katharina Reinecke, and Charles Herrmann. 2012. Accurate measurements of pointing performance from in situ observations. In Chi '12 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems: May 5-10, 2012, Austin, Texas, USA, ed. Joseph A. Konstan, Ed H. CHi and Kristina Kristina Höök, 3157-3166. New York: Association for Computing Machinery.
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Abstract: We present a method for obtaining lab-quality measurements of pointing performance from unobtrusive observations of natural in situ interactions. Specifically, we have developed a set of user-independent classifiers for discriminating between deliberate, targeted mouse pointer movements and those movements that were affected by any extraneous factors. To develop and validate these classifiers, we developed logging software to unobtrusively record pointer trajectories as participants naturally interacted with their computers over the course of several weeks. Each participant also performed a set of pointing tasks in a formal study set-up. For each movement, we computed a set of measures capturing nuances of the trajectory and the speed, acceleration, and jerk profiles. Treating the observations from the formal study as positive examples of deliberate, targeted movements and the in situ observations as unlabeled data with an unknown mix of deliberate and distracted interactions, we used a recent advance in machine learning to develop the classifiers. Our results show that, on four distinct metrics, the data collected in-situ and filtered with our classifiers closely matches the results obtained from the formal experiment.
Published Version: doi:10.1145/2207676.2208733
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
This file is one chapter of the book: http://portalparts.acm.org/2210000/2207676/fm/frontmatter.pdf?ip=128.103.233.121&CFID=227291227&CFTOKEN=83009486
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10861141
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