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Summary 3.5 Memory Theme 3: Semantic Memory $3.77
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Summary 3.5 Memory Theme 3: Semantic Memory

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Summarises the following chapters and articles: 1. Baddeley et al. (2015): Chapter 7: Semantic Memory and Stored Knowledge 2. The Parallel Distributed Processing Approach To Semantic Cognition, McClelland & Rogers (2003) 3. The neural and computational bases of semantic cognition, Ralph et al. (...

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  • March 23, 2023
  • 24
  • 2022/2023
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Theme 3: Semantic Memory
Baddeley et al. (2015): Chapter 7: Semantic Memory and Stored Knowledge

Semantic vs Episodic Memory

Episodic Semantic

contain specific info about when and lacks such contextual information
where memories were formed

Retrieval requires conscious effort Retrieval isn’t effortful

Hippocampal amnesia: impaired episodic Semantic dementia: degeneration of the
memory anterior temporal lobes



Personal semantics: aspects of autobio memory combining elements of EM & SM.
Semanticisation: EMs changing into SMs over time
→ these 2 show that EM and SM are separate but still interdependent systems


Concept Organisation: Theoretical Views

a. Hierarchical Network Theory
SM is organised into a series of hierarchical networks. Property info is stored as high up
the hierarchy as possible to minimise the amount of info needing to be stored in SM
Theory states that speed of processing increases with the number of levels (e.g. canary
= animal ⇒ slower than bird = animal)

Limitations:
- Familiarity explains processing speed, not
the distance between the concept and its
property
- Typicality effect also counters theory
- Falsely assumes that concepts belong to
rigidly defined categories (they dont bc of
ambiguity & vagueness)

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