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28-06-2024 | Research

Different grasping experiences affect mapping effects but not correspondence effects between stimulus size and response location

Auteurs: Melanie Richter, Peter Wühr

Gepubliceerd in: Psychological Research | Uitgave 7/2024

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Abstract

The so-called spatial-size association of response codes (SSARC) effect denotes that humans respond faster and more accurately with a left response to physically small stimuli and a right response to physically large stimuli, as compared to the opposite mapping. According to an application of the CORE principle to the SSARC effect, the habit to grasp larger/heavier objects with one’s dominant hand and smaller/lighter objects with one’s non-dominant hand creates spatial-size associations. We investigated if grasping habits play a causal role in the formation of spatial-size associations by testing if the mapping of a preceding object-grasping task affects the size of the SSARC effect in subsequent choice-response tasks with keypress responses. In the object-grasping task, participants were instructed to grasp wooden cubes of variable size either according to a compatible (small-left; large-right) or according to an incompatible (small-right; large-left) mapping. In the choice-response tasks, participants responded with left or right keypresses to the size or color of a small or large stimulus. The results showed that participants with the compatible mapping in the object-grasping task showed a larger SSARC effect in the size discrimination task, but not in the color discrimination task, than participants with the incompatible mapping in the object-grasping task. Results suggest that a short period of practice with different size-location mappings can modulate size-location links used for controlled S–R translation, but not links underlying automatic S–R translation. In general, the results support the hypothesis that grasping habits play a causal role in the formation of spatial-size associations.
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Voetnoten
1
Please note that the original sample size was seventy-six but one data set (no. 73) was excluded because this participant had inadvertently been tested twice.
 
2
The size of the objects was slightly larger than in our previous studies, in which the small stimulus had a side length of 2 cm, and the large object had a side length of 4 cm (e.g., Wühr & Seegelke, 2018). Otherwise, the stimulus material and procedure matched those of our previous studies.
 
3
We varied the duration of the fixation point, to keep participants more alert, and to avoid that participants responded in a constant rhythm.
 
4
Please note that, in both choice-response tasks, task order affected neither any main effects nor interactions, which indicates that completing the size discrimination task according to a mapping contrary to the mapping in the object-grasping task did not diminish the previous manipulation.
 
5
In an exploratory analysis, we compared the size of the SSARC effects after a grasping task with compatible or incompatible mapping with the size of the SSARC effect without a preceding grasping task (Seegelke et al., 2023, Experiment 1, parallel-arms condition). We observed a significant reduction of the SSARC effect after an incompatible mapping in the grasping task relative to the condition without grasping task, t(172) = 2.609, p = .010, d = 0.497, but no difference between the SSARC effect after a compatible mapping in the grasping task relative to the condition without grasping task, t(172) = 0.244, p = .808, d = 0.047.
 
Literatuur
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Metagegevens
Titel
Different grasping experiences affect mapping effects but not correspondence effects between stimulus size and response location
Auteurs
Melanie Richter
Peter Wühr
Publicatiedatum
28-06-2024
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 7/2024
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-024-01990-5