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Spreading activation is a method for searching associative networks, biological and artificial neural networks, or semantic networks. [1] The search process is initiated by labeling a set of source nodes (e.g. concepts in a semantic network) with weights or "activation" and then iteratively propagating or "spreading" that activation out to other nodes linked to the source nodes.
During the process of language activation, lemma retrieval is the first step in lexical access. In this step, meaning and the syntactic elements of a lexical item are realized as the lemma. Lemma retrieval, as explained through a spreading-activation theory, is part of a network of separate elements consisting of the abstract concept, the lemma ...
Spreading activation refers to the firing of connected nodes in associated memory links. [28] The theory states that memory is organized in a theoretical web of associated ideas and related features. Each feature, or node, is connected to related features or ideas, which in turn are themselves connected to other related nodes. [29] Spreading ...
Psi-theory, developed by Dietrich Dörner at the University of Bamberg, is a systemic psychological theory covering human action regulation, intention selection and emotion. [ 1 ] [ 2 ] It models the human mind as an information processing agent, controlled by a set of basic physiological, social and cognitive drives.
Semantic networks contributed to the ideas of spreading activation, inheritance, and nodes as proto-objects. One process of constructing semantic networks, known also as co-occurrence networks , includes identifying keywords in the text, calculating the frequencies of co-occurrences, and analyzing the networks to find central words and clusters ...
When one associated memory, a group of associated memories, or a whole line of associated memories becomes primed, this is known as spreading activation. In conditioning, contiguity refers to how associated a reinforcer is with behaviour. The higher the contiguity between events the greater the strength of the behavioural relationship.
Definition of activation: Activation can be defined in a variety of ways. For example, in a Boltzmann machine , the activation is interpreted as the probability of generating an action potential spike, and is determined via a logistic function on the sum of the inputs to a unit.
Chunks can also receive activation from Gaussian noise and from their similarity to other chunks. For example, if chicken is used as a retrieval cue, canary will receive activation by virtue of its similarity to the cue. When retrieving items from memory, ACT looks at the most active chunk in memory; if it is above threshold, it is retrieved ...