Domain-specific interference between storage and processing in complex span is driven by cognitive and motor...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Working Memory Research

Background:

• The complex-span paradigm is used to study working memory.
• Domain-specific interference in this paradigm remains debated.
• Distinguishing cognitive and motor operations is key to understanding interference.

Purpose of the Study:

• To investigate domain-specific interference from cognitive and motor operations on working memory maintenance.
• To differentiate the impact of verbal vs. visuospatial cognitive tasks.
• To differentiate the impact of oral vs. manual motor responses.

Main Methods:

• Participants performed a complex-span task with verbal (words) or visuospatial (dots) memoranda.
• Cognitive operations involved rhyme (verbal) or symmetry (visuospatial) judgments.
• Motor operations involved speaking or pointing responses.
• Cognitive load was controlled across conditions.

Main Results:

• Visuospatial memory suffered more from visuospatial cognitive operations and manual-spatial motor responses.
• Verbal memory performance declined with verbal cognitive operations and oral motor responses.
• Both cognitive and motor operations demonstrated domain-specific interference effects.

Conclusions:

• Working memory models must account for domain-specific interference in both verbal and visuospatial domains.
• Findings support the need for domain-specific processing mechanisms in memory models.
• The study clarifies the distinct roles of cognitive and motor operations in working memory.