Effects of alerting signals on the spatial Stroop effect: evidence for modality differences

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Factors

Background:

• The Simon effect and spatial Stroop effect demonstrate how stimulus-location and response-location congruency impact reaction times and accuracy.
• Previous research indicates alerting cues amplify visual spatial Stroop effects, supporting a dual-route framework for stimulus-response processing.
• The impact of alerting cues on auditory spatial Stroop effects remains unexplored, with potential modality-specific differences suggested.

Purpose of the Study:

• To investigate the influence of alerting cues on auditory and visual spatial Stroop effects.
• To determine if alerting-congruency interactions differ between auditory and visual stimulus modalities.
• To explore modality differences in the decay or inhibition of response-code activation.

Main Methods:

• Two experiments were conducted, examining the effects of alerting cues on spatial Stroop effects.
• Experiment 1 involved auditory stimuli (N=98), and Experiment 2 involved visual stimuli (N=97).
• Distributional analysis was employed to assess response-code activation dynamics.

Main Results:

• Alerting cues significantly amplified the spatial Stroop effect for visual stimuli.
• No significant amplification of the spatial Stroop effect was observed for auditory stimuli.
• Distributional analyses supported modality-specific differences in the inhibition or decay of response-code activation.

Conclusions:

• Alerting cues modulate the spatial Stroop effect differently depending on stimulus modality.
• Findings suggest distinct neural or cognitive mechanisms underlying auditory versus visual spatial Stroop processing.
• The results have implications for understanding the alerting-congruence interaction and its modality-dependent nature.