title: Differences between predictions of how a reflection behaves based on the behaviour of an object, and how an object behaves based on the behaviour of its reflection.
abstract: We studied adults' understanding of the relationship between objects and their reflections. Two studies investigated whether adults performed in a similar way when asked to predict the movement of a reflection in a flat mirror based on the movement of the corresponding object or, vice versa, predict the movement of the material object based on the movement of its reflection. We used simple movements in the experiments: movements in a straight line at various angles with respect to the mirror. Despite the simplicity of the task, some of the participants made incorrect predictions in a percentage of cases ranging from 0% to 54%, depending on the angle. Asymmetries between the two directions of prediction emerged, in particular in terms of types of error. Results confirmed a cognitive difference between deriving the reflected (virtual) world from the "real" (material) world and vice versa. In particular the expectation that something will be opposite in a mirror is more salient when people imagine how a reflection will be with respect to the material world rather than when they imagine how the material world will be with respect to a reflection.
authors: Department of Humanities (Section Philosophy and Human Sciences), University of Macerata, via Garibaldi, 20, 62100 Macerata, Italy. Electronic address: ivana.bianchi@unimc.it.
authors: Ivana
authors: I
authors: Bianchi
authors: Department of Psychological Sciences, Institute of Psychology Health and Society, University of Liverpool, Waterhouse Building, Block B, Brownlow Street, Liverpool L69 3GL, United Kingdom. Electronic address: m.bertamini@liverpool.ac.uk.
authors: Marco
authors: M
authors: Bertamini
authors: Department of Philosophy, Education and Psychology, University of Verona, Lungadige Porta Vittoria 17, 37129 Verona, Italy. Electronic address: ugo.savardi@univr.it.
authors: Ugo
authors: U
authors: Savardi
mesh_terms: D000328:Adult; D005260:Female; D005544:Forecasting; D006801:Humans; D007092:Imagination / Q000502:physiology*; D008297:Male; D009068:Movement / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods*; D011597:Psychomotor Performance / Q000502:physiology*; D055815:Young Adult
keywords: Identity; Mirrors; Naïve optics; Opposition; Reflection; Viewpoint