The visual size of graspable objects is needed to induce the potentiation of grasping behaviors even with verbal stimuli

Harrak, Mohamed Halim; Heurley, Loïc; Morgado, Nicolas; Mennella, Rocco; Dru, Vincent

doi:10.1007/s00426-021-01635-x

Cited by 9 publications

(11 citation statements)

References 55 publications

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“…An important addition of the present study to the literature on compatibility effects was the possibility to address the contribution of the compatibility between the object and the size of the effector (large/small hand), independently of the size of the response device (large/small key). The compatibility between stimulus and response sizes has been classically demonstrated with both the effector and response devices confounded: large responses are usually made on the large part of the device and, respectively, for small responses (Harrak et al, 2022; Pecher et al, 2019). Therefore, the compatibility effects observed could not be solely attributed to the coding of the size of the effector or the response device.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, grasp affordance evocation may not be necessarily at play during visual object processing. Heurley et al (2020) and more recently Harrak et al (2022) provided evidence for abstract coding of the size of the response device in compatibility paradigms, but not for abstract coding of the size of the stimulus. While both may contribute to compatibility effects, the sole demonstration of abstract coding of device size does not directly contradict the hypothesis that the perception of manipulable objects evokes grasp affordances.…”

Section: Introductionmentioning

confidence: 99%

“…To our knowledge, only a few very recent studies explicitly evaluated whether abstract coding of object size may be sufficient to induce compatibility effects between the size of visual objects and grasp responses (Guerineau et al, 2022; Harrak et al, 2022; Heurley et al, 2020; Pecher et al, 2019). In the work of Heurley et al (2020), black and white pictures of small and large fruit, and vegetable items that may be graspable with a power or a precision grasp were presented in their actual size.…”

Section: Introductionmentioning

confidence: 99%

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Stimulus–response compatibility effects during object semantic categorisation: Evocation of grasp affordances or abstract coding of object size?

Lilas

Wamain

Kalénine

2023

Quarterly Journal of Experimental Psychology

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When the size of visual objects matches the size of the response required to perform the task, a potentiation effect has been reported, with faster responses in compatible than incompatible situations. Size compatibility effects have been taken as evidence of close perception-action interrelations. However, it is still unclear whether the effect arises from abstract coding of the size of stimulus and response or from the evocation of grasp affordances from visual objects. We aimed to disentangle the two interpretations. Two groups of 40 young adults categorised small and large objects presented in standardised size as natural or artefacts objects. One group categorised manipulable objects that may be associated with small or large size properties and evoke power and precision grasp affordances. The other groups categorised non-manipulable objects that may only be associated with small or large size properties. Categorisation responses were made by reaching and grasping a monotonic cylindric device with a power and precision grip in a grasping condition and with large or small touch responses in a control condition. Compatibility effects were found in both grasping and control conditions, independently of the manipulability or category of objects. Participants were faster when the size of the expected response matched the size of the object than when they mismatched, especially for power grasp or whole-hand touch responses. Overall findings support the abstract coding hypothesis and suggest that compatibility between the conceptual size of the object and the size of the hand response is sufficient to facilitate semantic categorization judgements.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stimulus–response compatibility effects during object semantic categorisation: Evocation of grasp affordances or abstract coding of object size?

Lilas

Wamain

Kalénine

2023

Quarterly Journal of Experimental Psychology

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“…Like the potentiation effect of lateralised responses (Tucker & Ellis, 1998), this effect has been also extensively replicated (for a review, see Osiurak & Badets, 2016) and its embodied interpretation is generally never questioned. However, we recently reported results (Guerineau et al, 2022; Harrak et al, 2022; Heurley et al, 2020) opening on an alternative interpretation that we called the size-coding hypothesis (already developed by Masson, 2015 and Proctor & Miles, 2014; see also Pecher et al, 2019). This view suggests that this potentiation effect is due to an overlap between more abstract codes, the one representing manipulable objects and the one representing response options.…”

Section: Introductionmentioning

confidence: 90%

“…To directly test this hypothesis, we conducted two experiments, both following the same procedure and using a protocol close to the one previously used by Heurley et al (2020; see also Guerineau et al, 2022; Harrak et al, 2022). First, participants saw a large (10 cm) or a small (3 cm) 2D stimulus referred to in the instructions as “an ungraspable thing” (i.e., Experiment 1: a spot and Experiment 2: an ink stain).…”

Section: Introductionmentioning

confidence: 99%

The visual size is enough to automatically induce the potentiation of grasping behaviours

Heurley

Harrak

Guerineau

et al. 2023

Quarterly Journal of Experimental Psychology

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Seeing objects usually grasped with a power or a precision grip (e.g., an apple vs. a cherry) potentiates power-grip and precision-grip responses, respectively. An embodied account suggests that this effect occurs because object conceptual representations would lie on a motor simulation process. A new account, named the size-coding account, argues that this effect could be rather due to an overlapping of size codes used to represent both manipulable objects and response options. In this paper, we investigate whether this potentiation effect could be merely due to a low-level visual feature that favor a size-coding of stimuli: the visual size in which objects are presented. Accordingly, we conducted two experiments in which we presented highly elementary and non-graspable stimuli (i.e., ink spots) either large or small rather than graspable objects. Our results showed that the mere visual size automatically potentiates power- and precision-grip responses that is in line with the size-coding account of the potentiation effect of grasping behaviors. Moreover, these results appeal to improve the methodological control of the size of stimuli especially when researchers try to support the embodied account.

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The size coding of responses: The size of switches and the force feedback

Heurley,

Michalland,

Guerineau

et al. 2023

Int J Psychol

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We aimed to understand which factors have a functional role in the size coding of responses, either the size of the switches or the force required to trigger each switch. This question is of relevance because it allows a better understanding of processes underlying action coding. In each trial, participants saw a small or large object. Depending on its colour, the participants had to press one of two switches. In the “size” condition, the response device consisted of two switches of different visual size, but both required the same amount of force. In the “force‐feedback” condition, the response device consisted in two switches of identical visual size, but one switch required more force than the other. We found a compatibility effect in the “size,” not in the “force‐feedback” condition, supporting that the size‐coding of responses would be due to the size of the switches.

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The visual size of graspable objects is needed to induce the potentiation of grasping behaviors even with verbal stimuli

Cited by 9 publications

References 55 publications

Stimulus–response compatibility effects during object semantic categorisation: Evocation of grasp affordances or abstract coding of object size?

Stimulus–response compatibility effects during object semantic categorisation: Evocation of grasp affordances or abstract coding of object size?

The visual size is enough to automatically induce the potentiation of grasping behaviours

The size coding of responses: The size of switches and the force feedback

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