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Effects of working memory load on long-term word priming
Josep Baqués1, Dolors Sáiz, Jeffrey S Bowers
1Departament de Psicologia de l'Educació, Facultat de Psicologia, Universitat Autònoma de Barcelona, Spain. Josep.Baques@uab.es
Memory (Hove, England)
|July 29, 2004
Summary
Working memory does not support long-term repetition priming for words. However, verbal working memory load during encoding disrupts explicit word recall, while visual load does not.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Memory Research
Background:
- Long-term repetition priming is a form of implicit memory where prior exposure to a stimulus enhances subsequent processing.
- Working memory is crucial for temporarily holding and manipulating information, playing a role in various cognitive tasks.
- The specific contribution of verbal and visuo-spatial working memory to different types of memory, particularly priming and explicit recall, remains an area of investigation.
Purpose of the Study:
- To investigate the role of verbal and visuo-spatial working memory in supporting long-term repetition priming for written words.
- To determine whether working memory load at encoding affects implicit memory performance (repetition priming).
- To examine the impact of verbal versus visual working memory load on explicit memory recall.
Main Methods:
- Three experiments were conducted using word stem completion and category-exemplar production tasks to assess implicit memory.
- Working memory load was manipulated by requiring participants to simultaneously store digits (verbal load) or graphic shapes (visual load).
- Experiments 2 and 3 specifically compared the effects of verbal and visual working memory loads on both implicit (word stem completion) and explicit (cued recall) memory tests.
Main Results:
- Working memory load, whether verbal or visual, did not significantly affect performance on any of the implicit memory tests (repetition priming).
- Conversely, a verbal working memory load imposed during the encoding phase significantly impaired performance on the explicit memory test (cued recall).
- A visual working memory load at encoding did not produce a similar disruptive effect on explicit memory recall.
Conclusions:
- Repetition priming for words does not appear to rely on working memory resources.
- Explicit memory for words is susceptible to interference from verbal working memory load during encoding.
- The modality of working memory load (verbal vs. visual) differentially impacts explicit memory, suggesting distinct underlying mechanisms.