Saccadic Suppression and Adaptation
Revisiting the Methodology
The likelihood of perceiving the displacement of an object which occurs during a saccade is much lower than the likelihood of detecting such a movement during fixation (“saccadic suppression of image displacement”, or SSD). The methodology of inducing such unseen intrasaccadic target movements has been used to study adaptive changes in saccadic amplitude (first by McLaughlin (1967), and subsequently by many others including Mack, Fendrich, and Pleune (1978), Erkelens and Hulleman (1993), and Deubel (1995)). SSD was first quantitatively described in an experiment where the entire visual field was displaced (Bridgeman, Hendry, and Stark, 1975). Later studies have often used the displacement of small targets. We suggest that the induction of saccadic suppression with small targets requires more stringent conditions than those established by Bridgeman et al. for movement of the entire visual field.
KeywordsFalse Alarm Rate Small Target Saccadic Amplitude Target Displacement Image Displacement
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