A simultaneous procedure facilitates acquisition under an optimal interstimulus interval in artificial neural networks and rats.

Full Abstract

In a computer simulation, a neural network first received a simultaneous procedure, where the interstimulus interval (ISI) was 0 time-steps (ts). Output activations were near zero under this procedure. The network then received a forward-delay procedure where the ISI was 8 ts. Output activations increased to the near-maximum level faster than those of a control network that first received an explicitly unpaired procedure. Comparable results were obtained with rats that first received trials where a retractable lever was presented for 3s concurrently with access to water. Low-lever pressing was observed under this procedure. The rats then received trials where the lever was followed 15s after by water. Lever pressing appeared faster than a control group that received the 15-s ISI after an explicitly unpaired procedure. The model used in the simulation explains these results as connection-weight increments that promote little output activations in a simultaneous procedure, but facilitate acquisition in an optimal ISI.

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Author information

Author/s: Burgos, José E (JE); Flores, Carlos (C); García, Oscar (O); Díaz, Carlos (C); Cruz, Yuria (Y);

Affiliation: University of Guadalajara-CEIC, Francisco de Quevedo 180, Col. Arcos de Vallarta, Guadalajara, Jalisco 41130, Mexico. jburgos(-atsign-)cucba.udg.mx

Journal and publication information

Publication Type: Comparative Study; Journal Article

Journal: Behavioural processes (Behav Processes), published in Netherlands. (Language: eng)

Reference: 2008-Jun; vol 78 (issue 2) : pp 302-9

Dates: Created 2008/04/28; Completed 2008/07/25;

PMID: 18395995, status: MEDLINE (last retrieval date: 11/6/2008)

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