Accession Number : ADA300494

Title :   Final Technical Report for Contract N00014-91-J-1764 (Columbia College).

Descriptive Note : Final technical rept.,

Corporate Author : COLUMBIA COLL CHICAGO IL

Personal Author(s) : Lerman, Zafra ; Schmajuk, Nestor A. ; Goldbogen, Geog

PDF Url : ADA300494

Report Date : 1995

Pagination or Media Count : 11

Abstract : This study describes hippocampal participation in classical conditioning in terms of a multilayer network that portrays stimulus configuration. The network (a) describes behavior in real time, (b) incorporates a layer of "hidden" units positioned between input and output units, (c) includes inputs that are connected to the output directly as well as indirectly through the hidden-unit layer, and (d) employs a biologically plausible backpropagation procedure to train the hidden-unit layer. The model correctly describes the effect of hippocampal and cortical lesions in the following paradigms: (1) acquisition of delay and trace conditioning, (2) extinction, (3) acquisition-extinction series of delay conditioning, (4) blocking, (5) overshadowing, (6) discrimination acquisition, (7) discrimination reversal, (8) feature-positive discrimination, (9) conditioned inhibition, (10) negative patterning, (11) positive patterning, and (12) generalization. Some of these results might be extended to the description of anterograde amnesia in human patients.

Descriptors :   *MEMORY(PSYCHOLOGY), *LEARNING, *EXPERIMENTAL PSYCHOLOGY, OUTPUT, EXTINCTION, ACQUISITION, MODELS, NETWORKS, HUMANS, LAYERS, CONFIGURATIONS, DELAY, STIMULI, PATIENTS, DISCRIMINATION, INHIBITION, AMNESIA.

Subject Categories : Administration and Management
      Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE