So far so good: emotion in the peripersonal/extrapersonal space

• Published in: PloS one Vol. 7; no. 11; p. e49162
• Main Authors: Valdés-Conroy, Berenice, Román, Francisco J, Hinojosa, Jose A, Shorkey, S Paul
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 21.11.2012; Public Library of Science (PLoS)
• Subjects: Brain research; Cognition; Cognition & reasoning; Emotions - physiology; Experimental psychology; Female; Humans; Male; Medical imaging; Medicine; Object recognition; Perceptions; Personal Space; Photic Stimulation; Posture; Psychology; Reaction Time; Reaction time task; Representations; Science; Social and Behavioral Sciences
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0049162

Current accounts of spatial cognition and human-object interaction suggest that the representation of peripersonal space depends on an action-specific system that remaps its representation according to action requirements. Here we demonstrate that this mechanism is sensitive to knowledge about properties of objects. In two experiments we explored the interaction between physical distance and object attributes (functionality, desirability, graspability, etc.) through a reaching estimation task in which participants indicated if objects were near enough to be reached. Using both a real and a cutting-edge digital scenario, we demonstrate that perceived reaching distance is influenced by ease of grasp and the affective valence of an object. Objects with a positive affective valence tend to be perceived reachable at locations at which neutral or negative objects are perceived as non-reachable. In addition to this, reaction time to distant (non-reachable) positive objects suggests a bias to perceive positive objects as closer than negative and neutral objects (exp. 2). These results highlight the importance of the affective valence of objects in the action-specific mapping of the peripersonal/extrapersonal space system.