The role of compound retrieval in modulating task-switching performance and training effects

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• Task-switching costs typically indicate cognitive control efficiency.
• Limited target stimuli can promote compound retrieval, bypassing rule-based task-set control.
• The influence of compound retrieval on task-switching costs under explicit rule instruction is unclear.

Purpose of the Study:

• To investigate how compound retrieval affects task-switching costs when participants are instructed to use task rules.
• To examine the impact of limited target stimuli on task-switching training effects.

Main Methods:

• Three experiments were conducted using composite and cue-target interval designs.
• Participants were assigned to four-target, eight-target, or infinite-target groups to manipulate compound retrieval feasibility.
• Task-switching costs and response-congruency effects were measured.

Main Results:

• Participants in the four-target and eight-target groups showed greater reductions in task-switching costs compared to the infinite-target group.
• Larger response-congruency effects were observed in the limited-target groups.
• These findings were consistent across both experimental designs.

Conclusions:

• Reductions in task-switching costs with limited stimuli may stem from stimulus-response associations, not improved cognitive control.
• Task-switching costs in limited-stimulus paradigms might not accurately represent underlying cognitive control abilities.
• Explicit instructions to use task rules do not prevent the adoption of compound retrieval strategies.