David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
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Consciousness and Cognition 13 (2):373-390 (2004)
Saccadic chronostasis refers to the subjective temporal lengthening of the first visual stimulus perceived after an eye movement. It has been quantified using a duration discrimination task. Most models of human duration discrimination hypothesise an internal clock. These models could explain chronostasis as a transient increase in internal clock speed due to arousal following a saccade, leading to temporal overestimation. Two experiments are described which addressed this hypothesis by parametrically varying the duration of the stimuli that are being judged. Changes in internal clock speed predict chronostasis effects proportional to stimulus duration. No evidence for proportionality was found. Two further experiments assessed the appropriateness of the control conditions employed. Results indicated that the chronostasis effect is constant across a wide range of stimulus durations and does not reflect the pattern of visual stimulation experienced during a saccade, suggesting that arousal is not critical. Instead, alternative processes, such as one affecting the onset of timing are implicated. Further research is required to select between these alternatives.
|Keywords||*Eye Movements *Time Estimation *Visual Stimulation|
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References found in this work BETA
Susan Pockett (2002). On Subjective Back-Referral and How Long It Takes to Become Conscious of a Stimulus: A Reinterpretation of Libet's Data. Consciousness and Cognition 11 (2):141-61.
Benjamin W. Libet, Feinstein E. W. & Pearl B. (1979). Subjective Referral of the Timing for a Cognitive Sensory Experience. Brain 102:193-224.
Matthew S. Matell & Warren H. Meck (2000). Neuropsychological Mechanisms of Interval Timing Behavior. Bioessays 22 (1):94-103.
John Gibbon & Russell M. Church (1990). Representation of Time. Cognition 37 (1-2):23-54.
Citations of this work BETA
Tomomitsu Herai & Ken Mogi (2014). Perception of Temporal Duration Affected by Automatic and Controlled Movements. Consciousness and Cognition 29:23-35.
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