Attentional Modulation of Human Pattern Discrimination Psychophysics Reproduced by a Quantitative Model
Abstract
We previously proposed a quantitative model of early visual processing in primates, based on non-linearly interacting visual filters and statistically efficient decision. We now use this model to interpret the observed modulation of a range of human psychophysical thresholds with and without focal visual attention. Our model - calibrated by an automatic fitting procedure - simultaneously reproduces thresholds for four classical pattern discrimination tasks, performed while attention was engaged by another concurrent task. Our model then predicts that the seemingly complex improvements of certain thresholds, which we observed when attention was fully available for the discrimination tasks, can best be explained by a strengthening of competition among early visual filters.
Additional Information
© 1999 Massachusetts Institute of Technology. This research was supported by ONR and NSF (Caltech ERC).Attached Files
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Additional details
- Eprint ID
- 64850
- Resolver ID
- CaltechAUTHORS:20160229-112631799
- Office of Naval Research (ONR)
- NSF
- Created
-
2016-02-29Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Koch Laboratory (KLAB)
- Series Name
- Advances in Neural Information Processing Systems
- Series Volume or Issue Number
- 11