Related Experiment Videos
No overall right-left prevalence for horizontal and vertical Simon effects
Kim-Phuong L Vu1, Antonio Pellicano, Robert W Proctor
1California State University, Northridge, California, USA. kvu8@csulb.edu
Perception & Psychophysics
|December 13, 2005
Summary
This study found no right-left prevalence effect in Simon tasks under specific conditions. The Simon effect magnitude was similar across horizontal and vertical dimensions, challenging existing theories.
Area of Science:
- Cognitive Psychology
- Human-Computer Interaction
Background:
- The Simon task is a classic experimental paradigm used to study cognitive control and response selection.
- Previous research has indicated a right-left prevalence effect in certain two-dimensional Simon tasks, suggesting a bias in spatial processing.
Purpose of the Study:
- To investigate the presence and nature of the right-left prevalence effect in Simon tasks across various dimensional configurations.
- To determine if the right-left prevalence effect is a general phenomenon or specific to certain task parameters.
Main Methods:
- The study employed modified Simon tasks where stimulus and response sets varied across horizontal and vertical dimensions.
- Experiments included conditions with simultaneous variation in both dimensions, single-dimension variation, and four-location responses using a joystick.
Main Results:
- No overall right-left prevalence effect was observed in the Simon tasks under the tested conditions.
- Simon effects were of similar magnitude for both horizontal and vertical dimensions across all experiments.
Conclusions:
- The findings indicate that the right-left prevalence effect in two-dimensional Simon tasks is not attributable to automatic horizontal code activation.
- Differences in response selection efficiency, rather than automatic biases, likely explain the prevalence effect in location-relevant tasks.