The Shape-Weight Illusion

Kahrimanovic, M.; Tiest, Wouter M. Bergmann; Kappers, Astrid M. L.

doi:10.1007/978-3-642-14064-8_3

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…More details on this procedure can be found in [6]. A smaller set of the data from the present experiment has already been presented in a conference paper [9].…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Haptic Shape-Weight Illusion with 3D Objects

Kahrimanovic

Tiest

Kappers

2011

IEEE Trans. Haptics

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“…More details on this procedure can be found in [6]. A smaller set of the data from the present experiment has already been presented in a conference paper [9].…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Haptic Shape-Weight Illusion with 3D Objects

Kahrimanovic

Tiest

Kappers

2011

IEEE Trans. Haptics

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“…A contribution to the current debate on the relationship between perceived weight, expected weight, and perceived size [12,17,18,19,22,23,25] may come from the study of two illusions that have been known for a long time but that have remained relatively underexplored, namely the shape–weight illusion [26,27,28] and the brightness–weight illusion [29,30]. The main aim of the current study is to test the extent to which the two illusions can be explained in terms of the contrast between actual and expected weight, and/or in terms of the contrast between actual weight and perceived size.…”

Section: Introductionmentioning

confidence: 99%

“…In a more recent study, Kahrimanovic, Bergmann Tiest, and Kappers [27] used 13 triplets of stimuli, each including three brass solids of identical physical mass and volume: a cube, a sphere, and a tetrahedron. The stimuli in each triplet differed from the stimuli in the other triplets both in physical mass and physical size.…”

Section: Introductionmentioning

confidence: 99%

“…Using the same stimuli that they had used in their experiments on weight perception, Kahrimanovic, Bergmann Tiest, and Kappers [31] also measured the influence of shape on the haptically perceived size of objects. A direct comparison between the influence of shape on haptically perceived size and the influence of shape on haptically perceived weight showed that differences in perceived weight between tetrahedrons and cubes were actually larger than could be predicted from differences in perceived size [27,28]. Symmetrically, differences in perceived weight between tetrahedrons and spheres and between cubes and spheres were smaller than could be predicted from differences in perceived size.…”

Section: Introductionmentioning

confidence: 99%

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Influence of visually perceived shape and brightness on perceived size, expected weight, and perceived weight of 3D objects

2019

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In the size–weight illusion, when two objects of identical weight but different volume are lifted, the smaller object is typically perceived to weigh more than the larger object. A well-known explanation for this and other weight illusions is provided by the hypothesis that perceived weight results from the contrast between actual and expected weight. More recently, it has been suggested that an object’s size may exert a direct and automatic effect on its perceived weight, independently of expected weight. Here we test these two hypotheses by exploring two illusions that have been known for a long time but have remained relatively underexplored, namely the shape–weight and brightness–weight illusions. Specifically, we measured the influence of visually perceived shape and brightness on the perceived size, the expected weight, and the perceived weight of 3D plastic objects. A numerical rating task was used in Experiment 1, and a paired comparison task was used in Experiment 2. The results showed that spheres were perceived to be heavier than tetrahedrons and cubes, and cubes were perceived to be heavier than tetrahedrons. We did not find any consistent relationship between brightness and perceived weight. A systematic comparison between perceived size, expected weight, and perceived weight showed that the visual shape–weight and brightness–weight illusions are partially inconsistent with the hypothesis that perceived weight results from the contrast between actual and expected weight and with the hypothesis that perceived weight results from the contrast between actual weight and perceived size. The results appear to suggest that there may be a dissociation between the processing of variables that contribute to the conscious experience of size, such as brightness and vertical height, and the processing of variables that contribute to perceived weight, such as surface area.

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“…In previous studies we have shown that the perceived weight of 3-D objects is influenced by the shape of these objects. Overall, a perceptually smaller object is perceived as being heavier than a perceptually larger object of the same mass [13,14]. The individual differences in the present study might be related to the possibility that some subjects performed the task by focusing on the volume while other subjects focused more on the weight of the objects.…”

Section: Discussionmentioning

confidence: 58%

Bimanual volume perception of 3-D objects

Kahrimanovic

Tiest

Kappers

2011

2011 IEEE World Haptics Conference

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In the present study, blindfolded subjects had to explore differently shaped objects with two hands and to judge their volume. The results showed a significant effect of the shape of objects on their perceived volume. Additional analysis showed that this effect could not be explained by the subjects' tendency to base the volume judgment on a specific object dimension other than the volume itself. This contrasts with the results from previous studies, which used cylindrical objects or objects that could fit in one hand, in which the effect of shape on volume perception could be explained by the height/width ratio or the surface area of objects, respectively.

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The Shape-Weight Illusion

Cited by 10 publications

References 6 publications

Characterization of the Haptic Shape-Weight Illusion with 3D Objects

Characterization of the Haptic Shape-Weight Illusion with 3D Objects

Influence of visually perceived shape and brightness on perceived size, expected weight, and perceived weight of 3D objects

Bimanual volume perception of 3-D objects

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