Abstract
Experiment 1 investigated whether tool use can expand the peripersonal space into the very far extrapersonal space. Healthy participants performed line bisection in peripersonal and extrapersonal space using wooden sticks up to a maximum of 240 cm. Participants misbisected to the left of the true midpoint, both for lines presented in peripersonal and for those presented in extrapersonal space, confirming a peripersonal space expansion up to a distance of 240 cm. Experiment 2 investigated whether arm position could influence the perception of peripersonal and extrapersonal space during tool use. Participants performed line bisection in the peripersonal and in the extrapersonal space (up to a maximum of 120 cm) using wooden sticks in two different conditions: either with the arm bent or with the arm stretched. Results showed stronger pseudoneglect in the stretched arm condition.
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Acknowledgments
This research was supported by the European Project CEEDS, The Collective Experience of Emphatic Data Systems, European Integrated Project (Number: 258749; Call: ICT 2009.8.4 Human–Computer Confluence).
Conflict of interest
This supplement was not sponsored by outside commercial interests. It was funded entirely by ECONA, Via dei Marsi, 78, 00185 Roma, Italy.
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Seraglia, B., Priftis, K., Cutini, S. et al. How tool use and arm position affect peripersonal space representation. Cogn Process 13 (Suppl 1), 325–328 (2012). https://doi.org/10.1007/s10339-012-0458-8
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DOI: https://doi.org/10.1007/s10339-012-0458-8