CiteULike: Group: Glimcher_Lab - with tag model

Effects of 5-HT on Memory and the Hippocampus: Model and Data

Martijn Meeter — 2005-08-31T16:22:42-00:00

Neuropsychopharmacology, Vol. aop, No. current. (31 August 2005)

A model of saccade generation based on parallel processing and competitive inhibition.

JM Findlay — 2006-05-22T21:02:47-00:00

Behav Brain Sci, Vol. 22, No. 4. (August 1999)

During active vision, the eyes continually scan the visual environment using saccadic scanning movements. This target article presents an information processing model for the control of these movements, with some close parallels to established physiological processes in the oculomotor system. Two separate pathways are concerned with the spatial and the temporal programming of the movement. In the temporal pathway there is spatially distributed coding and the saccade target is selected from a "salience map." Both pathways descend through a hierarchy of levels, the lower ones operating automatically. Visual onsets have automatic access to the eye control system via the lower levels. Various centres in each pathway are interconnected via reciprocal inhibition. The model accounts for a number of well-established phenomena in target-elicited saccades: the gap effect, express saccades, the remote distractor effect, and the global effect. High-level control of the pathways in tasks such as visual search and reading is discussed; it operates through spatial selection and search selection, which generally combine in an automated way. The model is examined in relation to data from patients with unilateral neglect.

Temporal discounting when the choice is between two delayed rewards.

L Green — 2005-11-02T16:38:39-00:00

J Exp Psychol Learn Mem Cogn, Vol. 31, No. 5. (September 2005), pp. 1121-1133.

The present experiments extend the temporal discounting paradigm from choice between an immediate and a delayed reward to choice between 2 delayed rewards: a smaller amount of money available sooner and a larger amount available later. Across different amounts and delays, the data were consistently well described by a hyperbola-like discounting function, and the degree of discounting decreased systematically as the delay to the sooner reward increased. Three theoretical models (the elimination-by-aspects, present-value comparison, and common-aspect attenuation hypotheses) were evaluated. The best account of the data was provided by the common-aspect attenuation hypothesis, according to which the common aspect of the choice alternatives (i.e., the time until the sooner reward is available) receives less weight in the decision-making process. ((c) 2005 APA, all rights reserved).