1Cademy - Measuring discourse-level processes with verbal protocols and latent semantic analysis

Concept

Measuring discourse-level processes with verbal protocols and latent semantic analysis - latent semantic analysis (LSA)

Used to study verbal protocols from readers explaining or recording their thoughts as they read
Uses singular value decomposition to get a condensed matrix for comparing similarities and differences between words in a passage or larger chunks of text
Similarities between units of text (could be a few words, paragraphs, or sentences) are indicated by the cosine between corresponding, normalized vectors
Cosines of 0 indicate no similarity and 1 means high similarity
Assumes that similar words appear in similar contexts

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Updated 2021-06-22

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