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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 ...
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 ...
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 ...
A retrieval cue is a type of hint that can be used to evoke a memory that has been stored but cannot be recalled. Retrieval cues work by selecting traces or associations in memory that contain specific content. With regards to the theory of spreading activation, retrieval cues use associated nodes to help activate a specific or target node. [32]
A fast-spreading wildfire that erupted this week northwest of Los Angeles roared from nothing to nearly 10,000 acres − in a matter of hours.
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.
President Donald Trump’s executive order grasping far greater control over independent federal agencies embraces a constitutionally questionable theory that presidents dating back to Ronald ...