Subjective vertical and postural activity.
Document type :
Article dans une revue scientifique
PMID :
Permalink :
Title :
Subjective vertical and postural activity.
Author(s) :
Luyat, Marion [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Ohlmann, Théophile [Auteur]
Barraud, Pierre-Alain [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Ohlmann, Théophile [Auteur]
Barraud, Pierre-Alain [Auteur]
Journal title :
Acta Psychologica
Volume number :
95
Pages :
181-193
Publisher :
Elsevier
Publication date :
1997-02
ISSN :
0001-6918
HAL domain(s) :
Sciences cognitives
English abstract : [en]
Three experiments were conducted to test the effect of postural information, resulting from the active control of balance, on the perception of the vertical. Subjects were required to adjust a luminous rod in two different ...
Show more >Three experiments were conducted to test the effect of postural information, resulting from the active control of balance, on the perception of the vertical. Subjects were required to adjust a luminous rod in two different visual contexts: in the dark or within a tilted visual frame. In these experiments, postural activity was manipulated by placing observers either in a situation of slight postural imbalance (Experiment 1) or in a situation of postural immobilization (Experiment 2). In both situations performance was compared with a control condition in which subjects were standing upright freely (Experiment 1) or sitting unconstrained (Experiment 2). Results showed no main effect of active posture or of immobilization on the visual perception of the vertical. In the third experiment, subjects were supine with their Z body axis perpendicular to the plane of the luminous rod. Thus, body orientation relative to gravity was modified and motor activity reduced. In this position, the physical vertical was perceived quite accurately in a dark environment. Moreover, in the tilted frame condition, the supine body position clearly improved vertical judgments. These results are discussed in relation to the ecological theory of orientation (Stoffregen and Riccio, 1988).Show less >
Show more >Three experiments were conducted to test the effect of postural information, resulting from the active control of balance, on the perception of the vertical. Subjects were required to adjust a luminous rod in two different visual contexts: in the dark or within a tilted visual frame. In these experiments, postural activity was manipulated by placing observers either in a situation of slight postural imbalance (Experiment 1) or in a situation of postural immobilization (Experiment 2). In both situations performance was compared with a control condition in which subjects were standing upright freely (Experiment 1) or sitting unconstrained (Experiment 2). Results showed no main effect of active posture or of immobilization on the visual perception of the vertical. In the third experiment, subjects were supine with their Z body axis perpendicular to the plane of the luminous rod. Thus, body orientation relative to gravity was modified and motor activity reduced. In this position, the physical vertical was perceived quite accurately in a dark environment. Moreover, in the tilted frame condition, the supine body position clearly improved vertical judgments. These results are discussed in relation to the ecological theory of orientation (Stoffregen and Riccio, 1988).Show less >
Language :
Anglais
Audience :
Internationale
Administrative institution(s) :
Université de Lille
Research team(s) :
Neuropsychologie & Audition
Submission date :
2022-06-23T19:30:12Z
2022-06-29T06:49:48Z
2022-06-29T06:49:48Z