Failure of colour and contrast polarity identification at threshold for 
detection of motion and global form

Seymour, KJ; McDonald, JS; Clifford, CWG

doi:10.1016/j.visres.2009.03.022

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Failure of colour and contrast polarity identification at threshold for detection of motion and global form

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https://www.sciencedirect.com/science/article/pii/S0042698909001047
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Seymour, K., McDonald, J., & Clifford, C. (2009). Failure of colour and contrast polarity identification at threshold for detection of motion and global form. Vision Research, 49(12), 1592-1598. doi:10.1016/j.visres.2009.03.022.

Cite as: https://hdl.handle.net/21.11116/0000-0008-02B9-5

Abstract

We used identification at threshold to systematically measure binding costs in two visual modalities. We presented a conjunction of two features as a signal stimulus and concurrently measured detection and identification performance as a function of three threshold variables: duration, contrast and coherence. Discrepancies between detection and identification sensitivity functions demonstrated a consistent processing cost to visual feature binding. Our findings suggest that feature binding is indeed a genuine problem for the brain to solve. This simple paradigm can transfer across arbitrary feature combinations and is therefore suitable to use in experiments addressing mechanisms of sensory integration.