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07-03-2024 | Research

The Simon effect under reversed visual feedback

Auteurs: Hamza Sabek, Loïc P. Heurley, Ronan Guerineau, Vincent Dru

Gepubliceerd in: Psychological Research | Uitgave 4/2024

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Abstract

Our aim was to study the processes involved in the spatial coding of the body during actions producing multiple simultaneous effects. We specifically aimed to challenge the intentional-based account, which proposes that the effects used to code responses are those deemed relevant to the agent's goal. Accordingly, we used a Simon paradigm (widely recognized as a suitable method to investigate the spatial coding of responses) combined with a setup inducing a multimodal discrepancy between visual and tactile/proprioceptive effects (known to be crucial for body schema construction and action control). To be more precise, the setup allowed to horizontally reverse the visual effects of the hands compared to the tactile/proprioceptive effects (e.g., the right hand was seen as being on the left). In Experiment 1, the visual effects were not reversed. However, in Experiment 2, the visual effects were reversed, and the task emphasized the relevance of these effects to the participants. In Experiment 3, the visual effects were also reversed, but the task emphasized the relevance of tactile/proprioceptive effects. A Simon effect, based on the location of the tactile/proprioceptive effects, was observed in Experiments 1 and 3. However, in Experiment 2, the Simon effect was partially driven by the location of the visual effects. These findings collectively support that the agent's intention plays a prominent role in the representation of their body during action. This work also suggests a promising avenue for research in linking action and body representations.
Voetnoten
1
It is noteworthy that this view is not strictly opposed to the explanation of Ernst and Bank (2002). Indeed, it is possible that, considering the goal of the agent, the visual modality brings the most reliable information and therefore weighs more heavily in the coding, thus explaining both results on motor control and body ownership.
 
2
In this experiment, another group of participants received additional visual feedback, but we have not further detailed the results of this group because they did not provide any additional information considering the rationale developed here.
 
3
Sutter and Ladwig (2012) also transformed the visual feedback along the vertical axis. However, we did not discuss further their results on this transformation as we solely used a transformation along the horizontal axis in our experiment.
 
4
It is critical to note that Sutter and Ladwig (2012) did not report the specific response times associated with the transformation on the horizontal axis. More precisely, reported data were average RTs for both transformations (i.e., horizontal and vertical axis). Therefore, we recalculated each value based on available data. In addition, as the statistical analyses reported also referred to the mean RTs by merging the transformations on the horizontal and vertical axis, we were unable to determine whether the differences for the horizontal axis transformations were statistically significant or not.
 
5
However, because Sutter and Ladwig (2012) reported only average data for the horizontal and vertical axis transformations, we cannot be sure that this conclusion is valuable for the horizontal axis transformation.
 
6
We did not report analysis on movement times as various experiments support that the Simon effect is a response-selection phenomenon (Rubichi & Pellicano, 2004; Rubichi et al., 2000; Wallace, 1971) mainly captured by initiation times rather than by movement times. However, movement times were available on OSF.
 
7
It is noteworthy that in studies investigating the rubber-hand illusion, researchers typically exclude non-responders (e.g., Pfister et al., 2021). If we apply the same approach here and exclude participants who exhibited a positive Simon effect (i.e., 8 participants), the mean Simon effect for the remaining sample (i.e., 22 participants) was -18 ms (s = 17 ms). This effect size was statistically different from zero, t(22) = -4.970, p < 0.001.
 
8
We conducted a t-test with the experiment (Experiment 1: non-reversed group vs Experiment 2: visual-reversed group vs Experiment 3: non-reversed group) as a between-subject independent variable. This analysis revealed a statistically significant difference between the Global ITs mean for Experiment 2 (m = 519 ms; s = 52) compared to Experiment 1 (m = 478 ms; s = 54), t(58) = 2,98, p = 0,004.
 
Literatuur
go back to reference Clouter, A., Wilson, R., Allen, S., Klein, R. M., & Eskes, G. A. (2015). The influence of verbal and spatial working memory load on the time course of the Simon effect. Journal of Experimental Psychology: Human Perception and Performance, 41(2), 342–355. https://doi.org/10.1037/a0038715CrossRefPubMed Clouter, A., Wilson, R., Allen, S., Klein, R. M., & Eskes, G. A. (2015). The influence of verbal and spatial working memory load on the time course of the Simon effect. Journal of Experimental Psychology: Human Perception and Performance, 41(2), 342–355. https://​doi.​org/​10.​1037/​a0038715CrossRefPubMed
go back to reference Schneider, W., Eschman, A., & Zuccolotto, A. (2002). E-Prime user’s guide. Psychology Software Tools Inc. Schneider, W., Eschman, A., & Zuccolotto, A. (2002). E-Prime user’s guide. Psychology Software Tools Inc.
Metagegevens
Titel
The Simon effect under reversed visual feedback
Auteurs
Hamza Sabek
Loïc P. Heurley
Ronan Guerineau
Vincent Dru
Publicatiedatum
07-03-2024
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 4/2024
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-024-01936-x