Source of activation confusion model
Encyclopedia
SAC is a computational model of memory
encoding and retrieval. It has been developed by Lynne M. Reder at Carnegie Mellon University
. It shares many commonalities of with ACT-R
.
, the node activations are governed by a set of common computational principles such as spreading activation and the strengthening and decay of activation. However, a unique feature of the SAC model are episode nodes, which are newly formed memory traces that binds the concepts involved with the current experiential context. An additional recent addition to SAC is assumptions governing the probability of forming an association during encoding. These bindings are affected by working memory resources available.
SAC is considered among a class of dual-process models of memory, since recognition involves two processes: a general familiarity process based on the activation of semantic (concept) nodes and a more specific recollection process based on the activation of episodic (context) nodes. This feature has allowed SAC to model a variety of memory phenomena, such as meta-cognitive (rapid) feeling of knowing judgments, remember-know judgments, the word frequency mirror effect , age-related memory loss perceptual fluency, paired associate recognition and cued recall , as well as account for implicit and explicit memory tasks without positing an unconscious memory system for priming.
Memory
In psychology, memory is an organism's ability to store, retain, and recall information and experiences. Traditional studies of memory began in the fields of philosophy, including techniques of artificially enhancing memory....
encoding and retrieval. It has been developed by Lynne M. Reder at Carnegie Mellon University
Carnegie Mellon University
Carnegie Mellon University is a private research university in Pittsburgh, Pennsylvania, United States....
. It shares many commonalities of with ACT-R
ACT-R
ACT-R is a cognitive architecture mainly developed by John Robert Anderson at Carnegie Mellon University. Like any cognitive architecture, ACT-R aims to define the basic and irreducible cognitive and perceptual operations that enable the human mind....
.
Structure
SAC specifies a memory representation consisting of a network of both semantic (concept) and perceptual nodes (such as font) and associated episodic (context) nodes. Similar to ACT-RACT-R
ACT-R is a cognitive architecture mainly developed by John Robert Anderson at Carnegie Mellon University. Like any cognitive architecture, ACT-R aims to define the basic and irreducible cognitive and perceptual operations that enable the human mind....
, the node activations are governed by a set of common computational principles such as spreading activation and the strengthening and decay of activation. However, a unique feature of the SAC model are episode nodes, which are newly formed memory traces that binds the concepts involved with the current experiential context. An additional recent addition to SAC is assumptions governing the probability of forming an association during encoding. These bindings are affected by working memory resources available.
SAC is considered among a class of dual-process models of memory, since recognition involves two processes: a general familiarity process based on the activation of semantic (concept) nodes and a more specific recollection process based on the activation of episodic (context) nodes. This feature has allowed SAC to model a variety of memory phenomena, such as meta-cognitive (rapid) feeling of knowing judgments, remember-know judgments, the word frequency mirror effect , age-related memory loss perceptual fluency, paired associate recognition and cued recall , as well as account for implicit and explicit memory tasks without positing an unconscious memory system for priming.