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Published on: February 19, 2018
The role of spatial uncertainty in the context-specific proportion congruency effect.
Ozge Bozkurt1,2, Mine Misirlisoy3, Nart Bedin Atalay4
1Department of Psychology, Anadolu University, Eskişehir, Türkiye. ozgebozkurt@anadolu.edu.tr.
Spatial uncertainty in the prime-probe Stroop task is crucial for the context-specific proportion congruency (CSPC) effect. Removing this uncertainty significantly reduces or eliminates the CSPC effect, highlighting its importance.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Perception
Background:
- The context-specific proportion congruency (CSPC) effect is typically demonstrated using the prime-probe Stroop task.
- This task involves spatial uncertainty regarding color location, which may influence the CSPC effect.
Purpose of the Study:
- To investigate the role of spatial uncertainty in the context-specific proportion congruency (CSPC) effect.
- To determine if spatial uncertainty, particularly for the color dimension, is necessary for observing the CSPC effect.
Main Methods:
- Experiment 1 utilized a spatially separated Stroop task with color dimension uncertainty, observing the CSPC effect.
- Experiment 2 manipulated spatial uncertainty (color only, or color and word dimensions) in a large-sample prime-probe Stroop task.
- Bayesian and frequentist analyses were employed to assess the significance of the CSPC effect across conditions.
Main Results:
- A significant CSPC effect was observed when spatial uncertainty was present (Experiment 1).
- The CSPC effect was not found when only color dimension uncertainty was removed in Experiment 2.
- A small but significant CSPC effect was observed when both color and word dimension uncertainty were removed in Experiment 2, with Bayesian analysis showing no evidence.
Conclusions:
- Spatial uncertainty, particularly concerning the color dimension in the prime-probe Stroop task, significantly contributes to the CSPC effect.
- The findings suggest that the presence of spatial uncertainty is a key factor in eliciting the CSPC effect.
- The study underscores the importance of considering spatial factors in understanding attentional selection and cognitive control mechanisms.
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