Authors
Barbara M Wildemuth, Meng Yang, Anthony Hughes, Richard Gruss, Gary Geisler, Gary Marchionini
Publication date
2003/11
Conference
TRECVID
Description
The Open Video Project is specifically concerned with the surrogates that can represent the objects in a digital video collection and the mechanisms through which people can manipulate those surrogates. In TREC VID 2003, we compared the effectiveness of a transcript-only search system, a features-only search system and a search system combining transcript and feature searching. We also presented several different views for users to browse the results pages: a horizontal view, a vertical view, a “before & after” view, and an extra-keyframe view. A within-subjects research design was used, so that each of the 36 participants was exposed to all three search systems. Each participant searched half (12) of the assigned topics. The user satisfaction measures recommended by NIST were augmented by measurements of participants’ perceived usefulness, perceived ease of use, and flow. Results indicated that, with the transcript-only system and the combined system, users were able to achieve higher recall in less time per search. The results from the measures of satisfaction indicate that the users found the transcript-only and combined systems to be more useful and easier to use, and their use resulted in stronger perceptions of enjoyment and concentration than the features-only system. It is concluded that, as users gain experience with features searching, it will be a welcome supplement to transcript searching.
Total citations
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Scholar articles