Investigating the cost to ongoing tasks not associated with prospective memory task requirements

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• Prospective memory (PM) involves remembering to perform an intended action in the future.
• The cognitive cost of PM tasks is often measured by their interference with ongoing activities.
• Conscious resource allocation is a key factor in understanding PM performance.

Purpose of the Study:

• To investigate the relationship between prospective memory (PM) and consciousness.
• To examine the cost to ongoing activities as an indicator of conscious resource allocation for PM.
• To determine the conditions under which PM costs manifest in relation to task relevance and transitions.

Main Methods:

• Alternating blocks of ongoing tasks where a PM task was either relevant or irrelevant.
• Assessing the cost to ongoing task performance in different block types and at transition points.
• Manipulating the compatibility of irrelevant stimuli with the PM task and the order of relevant/irrelevant blocks.

Main Results:

• Costs to ongoing activities were observed even when the PM task was irrelevant.
• Costs were greatest at the beginning of irrelevant blocks, suggesting a role for decision-making at transitions.
• Costs occurred when irrelevant blocks preceded relevant blocks, indicating sustained effects.

Conclusions:

• Prospective memory tasks engage conscious resources, even when not immediately relevant.
• The allocation of conscious resources is dynamic and influenced by task transitions and perceived relevance.
• Understanding PM costs provides insights into the mechanisms of conscious attention and resource management.