Sharing an automatic link is crucial in the congruency sequence effect between spatial conflict tasks.

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Neuroscience

Background:

• The congruent sequence effect (CSE) is theorized to resolve spatial conflict by inhibiting automatic stimulus-response links.
• Previous research focused on task-specific control mechanisms rather than the automatic link itself.

Purpose of the Study:

• To investigate if cross-task CSE occurrence depends on shared automatic links between tasks.
• To examine how shared irrelevant stimulus dimensions and response modes influence cross-task CSE.

Main Methods:

• Participants performed alternating trials of horizontal Simon and vertical spatial Stroop tasks.
• Response key configurations were manipulated (H-V and H-H) to control for shared automatic links.
• Cross-task CSE was measured under different spatial response configurations.

Main Results:

• A significant cross-task CSE was observed only with the H-V response configuration, where tasks shared an automatic link.
• No cross-task CSE was found with the H-H configuration, which prevented shared automatic links.
• The results highlight the role of shared spatial stimulus-response correspondence.

Conclusions:

• Sharing of an automatic link between spatial conflict tasks is essential for the occurrence of the cross-task CSE.
• This finding clarifies the mechanism underlying the CSE in dual-task scenarios.
• The study emphasizes the importance of stimulus-response mapping in cognitive control.