The Influence of Context and Interactivity on Video Browsing

Structured Abstract Approaches tested: The goal of this study was to investigate the effects of providing context and interactivity in a retrieval system, supporting the browsing of search result sets. Thus, three systems were developed: (1) a basic system, modeled on the current results list provided by google video searching (runs UNC-BAS-1 and UNC-BAS-2); (2) a similar system, with the context of each shot provided by showing keyframes from the shots appearing just before and after the retrieved shot (runs UNC-CON-1 and UNC-CON-2); and (3) a system that builds on the previous system by offering several mechanisms of interactivity (runs UNC-INT-1 and UNC-INT-2). Comparative findings: In terms of both performance and user perceptions, the Context+Interactive system was superior. While there were no differences in precision, recall was improved with this system, and users preferred it (based on several measures of user perceptions). Conclusions: The effects of context on browsing search results were negligible, but should be explored further through re-examination of the definition and operationalization of the concept of context. Interactivity, in combination with context, had positive effects on browsing effectiveness; it was considered easy to use, even though it introduced more complexity into the interface.

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