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Percog: Organisation

Perception and Cognition - Semantic Organisation

QuestionAnswer
What is Semantic Network? Semantic information organised in LTM by linking concepts to related concepts.
How is Semantic Network represented by? Diagrams. Concepts are called nodes. Lines showing relationship between two concepts are links. The length of the lines represent the degree of relatedness of the two concepts.
What is Spreading Activation? It is activation spread from a concept in a semantic network to activate other related concepts.
What is the Spreading Activation Model? Accounts for the typicality effect. A concept processed results in activation spread across semantic network, where it loses strength over time, distance, and intervening activity. Activation of 2nd concept will decrease amount activate in 1st.
What is the evidence for the Spreading Activation Model? Semantic Priming - decision about one concept makes it easier to decide another concept. If 2 strings of words are semantically related, people are faster at verifying the 2nd string of words.
State the advantages of the Spreading Activation Model. It include assumptions of 1) Hierarchical Network model and 2) Feature comparison model. Allow for use of feature matching in verification of semantic statement.
State the criticism of the Spreading Activation Model Too much assumptions can account for everything. Too few clear-cut predictions. Need specific prediction or unable to determine whether model is good.
Created by: predictability
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