The effect of irrelevant response dimension on stimulus response compatibility

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Neuroscience

Background:

• Established cognitive effects like Stroop, Simon, and Eriksen flanker demonstrate how irrelevant stimulus features impact task performance.
• Previous research primarily focused on stimulus-based irrelevant dimensions, leaving response-based irrelevant dimensions less explored.
• Understanding stimulus-response compatibility (SRC) is crucial for designing intuitive interfaces and predicting human behavior in complex tasks.

Purpose of the Study:

• To investigate the impact of an irrelevant color dimension associated with a response on task performance.
• To determine if a Color Compatibility effect emerges when task-irrelevant colored labels are presented near response locations.
• To explore the conditions under which this Color Compatibility effect is observed and its relation to working memory.

Main Methods:

• Participants performed a color-discrimination Simon task, responding with left or right key presses.
• Two-colored, task-irrelevant labels were presented on the left and right sides of the display.
• Reaction times and accuracy were measured under conditions where label color either matched or mismatched the stimulus color.

Main Results:

• A significant Color Compatibility effect was observed: faster and more accurate responses occurred when the irrelevant label color matched the stimulus color.
• This effect was replicated in subsequent experiments, confirming its robustness.
• The effect diminished when color was irrelevant to both stimulus and response, suggesting a role for working memory representation.

Conclusions:

• An irrelevant color dimension linked to a response can elicit a stimulus-response compatibility (SRC) effect.
• The Color Compatibility effect appears contingent on the color information being held in working memory.
• Findings contribute to the dimensional overlap model and broaden the understanding of SRC effects in cognitive psychology.