Information integration in judgements of time to contact

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Abstract:

Time to contact (TTC) is specified optically by tau, and studies suggest that observers are sensitive to this information. However, TTC judgements also are influenced by other sources of information, including pictorial depth cues. Therefore, it is useful to identify these sources of information and to determine whether and how their effects combine when multiple sources are available. We evaluated the effect of five depth cues on TTC judgements. Results indicate that relative size, height in field, occlusion, and motion parallax influence TTC judgements. When multiple cues are available, an integration (rather than selection) strategy is used. Finally, the combined effects of multiple cues are not always consistent with a strict additive model and may be task dependent.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/02724980343000053

Affiliations: 1: Texas Tech University, Lubbock, TX, USA 2: NASA Ames Research Center, Moffet Field, CA, USA

Publication date: October 1, 2003

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