Commonalities and differences in the working memory components underlying letter and category fluency tasks: a...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Memory

Background:

• Working memory is crucial for complex cognitive tasks.
• Verbal fluency tasks assess cognitive flexibility and executive functions.
• Understanding working memory's role in fluency is essential for cognitive models.

Purpose of the Study:

• To investigate how different working memory subcomponents influence letter and category fluency.
• To determine the specific contributions of the phonological loop and visuospatial sketchpad to verbal fluency.
• To examine the role of executive functions, such as mental set shifting, in these tasks.

Main Methods:

• A dual-task interference paradigm was employed with 96 college students.
• Participants completed letter and category fluency tasks alone and with interfering secondary tasks.
• Secondary tasks were designed to selectively engage different working memory subsystems.

Main Results:

• The phonological loop significantly contributed to letter fluency.
• The visuospatial sketchpad was important for category fluency.
• Evidence suggests executive functions, specifically mental set shifting, are utilized in both fluency tasks.

Conclusions:

• Working memory subsystems differentially contribute to verbal fluency performance.
• The phonological loop and visuospatial sketchpad are key components influencing letter and category fluency, respectively.
• Mental set shifting is a critical executive function for executing both types of verbal fluency tasks.