Biology – Quantitative Biology – Neurons and Cognition
Scientific paper
2006-10-04
Biology
Quantitative Biology
Neurons and Cognition
Preliminary results reported at ECVP 2006, 12 pages, 6 figures
Scientific paper
Eye movements are a behavioral response that can be involved in tasks as complicated as natural image classification. This report confirms that pro- and anti-saccades can be used by a volunteer to designate target (animal) or non-target images that were centered 16 degrees off the fixation point. With more than 86% correct responses, 11 participants responded to targets in 470 milliseconds on average, starting as quick as 245 milliseconds. Furthermore, tracking the gaze position is considered a powerful method in the studies of recognition as the saccade response times, ocular dynamics and the events around the response time can be calculated from the data sampled 240 times per second. The Hilbert transform is applied to obtain the analytic signal from the horizontal gaze position. Its amplitude and phase are used to describe differences between saccades that may testify to the recognition process.
Lacis Ivars
Paeglis Roberts
Podniece Anda
Sjakste Nikolajs
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