Declarative strategies persist under increased cognitive load.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Memory

Background:

• Multitasking leads to performance decrements on individual tasks.
• Existing theories explore task interference but not specific memory system interactions.
• The role of declarative versus procedural memory in dual-tasking requires further investigation.

Purpose of the Study:

• To investigate how dual-tasking affects learning and memory systems.
• To determine if dual-tasking impairs primary task performance by reducing declarative learning or by shifting control to procedural systems.
• To differentiate between procedural and declarative learning under single- and dual-task conditions.

Main Methods:

• Participants learned perceptual categorization tasks, some presumed procedural, others declarative.
• Task performance was assessed with and without a concurrent dual task.
• Response keys were switched post-learning to differentiate procedural from declarative learning based on performance impairment.

Main Results:

• Declarative memory categorization tasks were learned via declarative systems, irrespective of dual-task load.
• Performance impairments after key-switching indicated the learning system used.
• No evidence suggested a shift from declarative to procedural systems under dual-task conditions for these tasks.

Conclusions:

• Declarative learning systems remain engaged for declarative tasks even during multitasking.
• Dual-tasking does not necessarily force a shift to slower procedural systems when declarative memory is engaged.
• Task demands and inherent learning system recruitment are key factors in multitasking performance.