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Open AccessArticle

Matching Visual and Acoustic Mirror Forms

Department of Humanities, University of Macerata, Macerata 62100, Italy
Department of Human Sciences, University of Verona, Verona 37129, Italy
Guitar Maestro, Fermo 63900, Italy
Author to whom correspondence should be addressed.
Academic Editor: Marco Bertamini
Symmetry 2017, 9(3), 39;
Received: 24 January 2017 / Accepted: 2 March 2017 / Published: 10 March 2017
(This article belongs to the Special Issue Symmetry in Vision)
This paper presents a comparative analysis of the ability to recognize three mirror forms in visual and acoustic tasks: inversion (reflection on a horizontal axis), retrograde (reflection on a vertical axis) and retrograde inversion (reflection on both horizontal and vertical axes). Dynamic patterns consisting of five tones in succession in the acoustic condition and five square dots in succession in the visual condition were presented to 180 non‐musically expert participants. In a yes/no task, they were asked to ascertain whether a comparison stimulus represented the “target” transformation (i.e., inversion, retrograde or retrograde inversion). Three main results emerged. Firstly, the fact that symmetry pertaining to a vertical axis is the most easily perceived does not only apply to static visual configurations (as found in previous literature) but also applies to dynamic visual configurations and acoustic stimuli where it is in fact even more marked. Secondly, however, differences emerged between the facility with which the three mirror forms were recognized in the acoustic and visual tasks. Thirdly, when the five elements in the stimulus were not of the same duration and therefore a rhythmic structure emerged, performance improved not only in the acoustic but also (even more significantly) in the visual task. View Full-Text
Keywords: visual symmetry; acoustic symmetry; mirror form detection; inversion; retrograde;  retrograde inversion; dynamic stimuli visual symmetry; acoustic symmetry; mirror form detection; inversion; retrograde;  retrograde inversion; dynamic stimuli
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MDPI and ACS Style

Bianchi, I.; Burro, R.; Pezzola, R.; Savardi, U. Matching Visual and Acoustic Mirror Forms. Symmetry 2017, 9, 39.

AMA Style

Bianchi I, Burro R, Pezzola R, Savardi U. Matching Visual and Acoustic Mirror Forms. Symmetry. 2017; 9(3):39.

Chicago/Turabian Style

Bianchi, Ivana; Burro, Roberto; Pezzola, Roberta; Savardi, Ugo. 2017. "Matching Visual and Acoustic Mirror Forms" Symmetry 9, no. 3: 39.

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