Shared mechanisms underlying the location-, word- and arrow-based Simon effects.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Factors

Background:

• The Simon effect demonstrates faster responses when irrelevant spatial information aligns with the correct response.
• This effect is observed with physical locations, location words, and directional arrows.
• Previous research indicates differing reaction-time (RT) distribution patterns for these variants.

Purpose of the Study:

• To investigate the temporal dynamics of location-, word-, and arrow-based Simon effects using novel analytical methods.
• To evaluate the applicability of the diffusion model for conflict tasks (DMC) to word- and arrow-based Simon effects.
• To explore shared and distinct mechanisms underlying different Simon effect variants.

Main Methods:

• Analysis of survival curves and divergence point analysis were applied to study Simon effect time courses.
• The diffusion model for conflict tasks (DMC) was used to model RT distributions.
• Comparison of location-, word-, and arrow-based Simon effects.

Main Results:

• Distinct survival curves and divergence points were found for the three Simon effect types.
• The DMC successfully captured key features of the RT distributions for all tested Simon effects.
• Shared underlying mechanisms are suggested despite differing RT distributions.

Conclusions:

• Location-, word-, and arrow-based Simon effects exhibit unique temporal characteristics.
• The diffusion model for conflict tasks provides a unified framework for understanding these effects.
• The findings suggest common cognitive processes underlie various manifestations of the Simon effect.