29 European Conference on Visual Perception
St-Petersburg, Russia
20-25 August 2006


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ECVP2006 Abstract




Judging temporal duration during normal vision and during saccadic eye-movements
      D C Burr    
Istituto di Neuroscienze del CNR, Via Moruzzi 1, Pisa 56100, Italy
  dave@in.cnr.it
 
      M C Morrone    
Universita' Vita-Salute S. Raffaele, Via Olgettine 58, 20132 Milano
  morrone.concetta@hsr.it
 

Accurate timing over the sub-second scale is essential for a range of human perceptual and motor activities, but the mechanisms for encoding this time scale remain poorly understood. Recent work suggests that timing does not involve a centralised clock, but patterning within a local distributed neural network. We will present and discuss recent experiments and models of duration estimation in conditions of adaptation and masking, and during saccades. All these factors can dramatically influence time perception. Time is compressed and even inverted during saccadic eye-movements. Masking and adaptation also affect apparent duration in a spatially localised manner (Johnston et al., Curr Biol, 2006). More recent experiments show that if gaze is shifted between adaptation and test periods, the effects of adaptation on temporal duration are both retinotopic and also spatiotopic. This result sits nicely with Janssen and Shadlens (Nat Neurosc, 2005) evidence that neurones in parietal cortex, whose receptive fields shift around the time of saccades, are instrumental in coding sub-second intervals.

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Presentation:
The perception of time
Talk: Monday, 21 August 2006; 10:00-10:30

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