Visual cues and perceived reachability |
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| Affiliation: | 1. Departamento de Nutrição, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil;2. Departmento de Fisiologia e Farmacologia, Universidade Federal de Pernambuco, 50670901, Recife, Brazil;1. Department of Blood Transfusion, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China;2. Department of Endocrinology, The Third People''s Hospital of Qingdao, Qingdao, China;3. Department of Central Laboratory and Mitochondrial Medicine Laboratory, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China;4. Department of Endocrinology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China;1. Department of Nutrition, Federal University of Piauí, Campus Minister Petrônio Portela, Health Science Center, SG-13, Bairro: Ininga, CEP: 64.049-550, Teresina, PI, Brazil;2. Department of Food and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 580 – Bloco 14, Bairro: Butantã, CEP: 05508900, São Paulo, SP, Brazil;3. Federal University of Piauí, Campus Ministro Petrônio Portela, Health Science Center, Postgraduate Program in Food and Nutrition, SG-13, Bairro: Ininga, CEP: 64.049-550, Teresina, PI, Brazil;4. School of Pharmaceutical Sciences, University of São Paulo, Av. Lineu Prestes 580, Bloco 14 – Conjunto das Químicas – Cidade Universitária, CEP: 05508-900, São Paulo, SP, Brazil;5. Department of Chemistry, Federal University of Piauí, Campus Ministro Petrônio Portela, Center for the Natural Sciences, SG-02, Bairro: Ininga, CEP: 64.049-550, Teresina, PI, Brazil;1. Department of Endocrinology, The Affiliated Changzhou No. 2 People''s Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China;2. Department of Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China;1. Department of Human Studies, University of Alabama at Birmingham, USA;2. Department of Nutrition Sciences, University of Alabama at Birmingham, USA |
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| Abstract: | A rather consistent finding in studies of perceived (imagined) compared to actual movement in a reaching paradigm is the tendency to overestimate at midline. Explanations of such behavior have focused primarily on perceptions of postural constraints and the notion that individuals calibrate reachability in reference to multiple degrees of freedom, also known as the whole-body explanation. The present study examined the role of visual information in the form of binocular and monocular cues in perceived reachability. Right-handed participants judged the reachability of visual targets at midline with both eyes open, dominant eye occluded, and the non-dominant eye covered. Results indicated that participants were relatively accurate with condition responses not being significantly different in regard to total error. Analysis of the direction of error (mean bias) revealed effective accuracy across conditions with only a marginal distinction between monocular and binocular conditions. Therefore, within the task conditions of this experiment, it appears that binocular and monocular cues provide sufficient visual information for effective judgments of perceived reach at midline. |
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