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Transient binding by time: Neuropsychological evidence from anti-extinction.
- Source :
-
Cognitive Neuropsychology . Jun2002, Vol. 19 Issue 4, p361-380. 20p. - Publication Year :
- 2002
-
Abstract
- Anti-extinction occurs when there is poor report of a single stimulus presented on the contralesional side of space, but better report of the same item when it occurs concurrently with a stimulus on the ipsilesional side (Goodrich & Ward, 1997). We report a series of experiments that examine the factors that lead to anti-extinction in a patient GK, who has bilateral parietal lesions but more impaired identification of left-side stimuli. We show a pattern of anti-extinction when stimuli are briefly presented, which is followed by an extinction effect when stimuli are left for longer in the visual field. In Experiments 1 and 2 we present evidence that the anti-extinction effects are determined by stimuli onsetting together, and it is not apparent when stimuli are defined by offsets. In Experiments 3 and 4 we report that performance is not strongly affected by whether the same or different tasks are performed on the ipsi- and contralesional stimuli, and the anti-extinction effect also survives trials where eye movements are made to right-side stimuli. Experiment 5 provides evidence that anti-extinction is due to temporal grouping between stimuli, rather than to increased arousal or cueing attention to the contralesional side. Experiment 6 demonstrates that anti-extinction dissociates from GK's conscious perception of when contra- and ipsilesional stimuli occur together. We interpret the data as indicating that there is unconscious and transient temporal binding in vision. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NEUROPSYCHOLOGY
*EXTINCTION (Psychology)
Subjects
Details
- Language :
- English
- ISSN :
- 02643294
- Volume :
- 19
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Cognitive Neuropsychology
- Publication Type :
- Academic Journal
- Accession number :
- 6687651
- Full Text :
- https://doi.org/10.1080/02643290143000222