The role of working memory storage components in exact and approximate arithmetic processing under dual-task...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Cognition

Background:

• Working memory is crucial for complex cognitive tasks.
• It comprises distinct components: verbal storage, visuospatial storage, and central executive functions.
• Understanding these components' roles in arithmetic is key to cognitive research.

Purpose of the Study:

• To investigate the specific roles of verbal and visuospatial short-term storage in working memory for exact and approximate arithmetic.
• To examine the impact of central executive interference on both arithmetic processing types.
• To elucidate distinct working memory mechanisms underlying different arithmetic strategies.

Main Methods:

• Four dual-task experiments were conducted with adult participants.
• Tasks involved exact and approximate arithmetic under varying working memory loads (verbal, visuospatial, central executive interference).
• Experimental manipulations included changes in interference materials and arithmetic task difficulty balancing.

Main Results:

• Verbal and visuospatial storage interference significantly impaired exact arithmetic performance.
• Approximate arithmetic performance was unaffected by storage interference but was disrupted by central executive interference.
• Central executive interference negatively impacted both exact and approximate arithmetic tasks.

Conclusions:

• Exact arithmetic processing is more dependent on verbal and visuospatial short-term storage than approximate arithmetic.
• Both exact and approximate arithmetic rely on central executive resources within working memory.
• Distinct working memory mechanisms underpin exact versus approximate arithmetic, highlighting cognitive flexibility.