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Memory and linguistic demands of the Token Test (Pham et al., 2022) ...
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Memory and linguistic demands of the Token Test (Pham et al., 2022) ...
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Phonological and semantic encoding in verbal short-term memory ...
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Disruption of verbal short-term memory: Evidence for phonological and semantic levels of representation ...
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The Role Of Working Memory And Linguistic Knowledge On Language Performance
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In: Electronic Thesis and Dissertation Repository (2021)
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Abstract:
The language system is highly flexible and draws on distinct but interconnected cognitive mechanisms, including verbal working memory and long-term linguistic knowledge. Verbal working memory is the ability to manipulate verbal information in mind. Long-term linguistic knowledge refers to our knowledge of the language (i.e., phonology, semantics, syntax), stored in long-term memory. The close interaction between verbal working memory and linguistic knowledge highlights a pressing need to investigate the construct of verbal working memory, its separability and its relationship with linguistic knowledge. To understand the way working memory influences and interacts with language abilities in children and adults, I ask the following questions: Are verbal working memory and language separable constructs? And, does verbal working memory operate within a dynamic network of cognitive systems including the language network? In Chapter 2, I examined whether working memory and linguistic abilities could be teased apart using the same language task, namely a modified Token Test. Indeed, factors related to working memory and linguistic abilities explained performance on our modified Token Test and were differentially related to other language measures. Despite evidence of separability, it must be acknowledged that verbal working memory and language processing are highly intertwined. Chapters 3 and 4 investigated this interrelationship in detail. Specifically, I used experimental tasks to delineate the involvement of phonological and semantic representations in the maintenance of verbal items (words, sentences) in working memory. In Chapter 3, I used a novel word recognition paradigm and found separable phonological and semantic effects on immediate memory, with semantic processing supporting long-term retention. These findings confirmed that both phonological and semantic information were readily activated and accessed when a word is encountered and processed. Chapter 4 further evaluated the interplay between different cognitive processes underlying verbal working memory in the context of sentence recall. Similarly, results supported the idea that multiple representations influence performance, but their contributions differ. Semantic processing was beneficial for both immediate and long-term memory whereas phonological processing had more immediate benefits. Finally, in the concluding chapter, I discuss the importance of these results for models of verbal short-term memory and highlight some potential implications for clinical practice.
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Keyword:
Language development; Language performance; Linguistic knowledge; Phonology; Semantics; Speech and Hearing Science; Verbal working memory
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URL: https://ir.lib.uwo.ca/cgi/viewcontent.cgi?article=10895&context=etd
https://ir.lib.uwo.ca/etd/8236
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