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11. Multisensory Integration Induces Body Ownership of an External Tool

Author

Weser, Veronica, Finotti, Gianluca, and Proffitt, Dennis

Abstract

Bodily self-consciousness (BS) refers to self-knowledge like body shape, position and ownership. BS relies on theintegration of multisensory bodily signals and can be experimentally manipulated with the Rubber Hand Illusion (RHI). In thisillusion, the incorporation of a rubber hand into the BS is facilitated by visual similarity to the participant’s hand. Neurophysiologicalresearch indicates that tool use alters neural networks mapping body shape and posture for coordinating motor actions.The present experiment sought to unify perceptual and motoric BS accounts using a modified RHI. We found that synchronousmultisensory stimulation induced perceptual embodiment of an external tool. The RHI was stronger if multisensory stimulationwas preceded by tool use, highlighting the motor system’s role in embodiment. The illusion, as measured by proprioceptivedrift and questionnaires, was stronger for skilled individuals but also occurred for untrained participants. This experiment helpsto clarify the role of perceptual and motoric embodiment.

Published
2015

17. Pre-print

Author

Azevedo, Ruben, Villani, Valerio, Tsakiris, Manos, Di Lernia, Daniele, and Finotti, Gianluca

Subjects
pupil dillation, event-related tVNS, locus coeruleus, noradrenaline, vagus nerve, tVNS, vagus nerve stimulation, pupil, taVNS, oddball, event-related taVNS
Published
2022
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19. Inferring others' heart rate as a function of own heart rate perception and perceived social intelligence

Author

Arslanova, Irena, Galvez-Pol, Alejandro, Kilner, James, Finotti, Gianluca, and Tsakiris, Manos

Subjects
FOS: Psychology, Cognition and Perception, Psychology, social perception, Social and Behavioral Sciences, interoception
Abstract

Recently, Galvez-Pol and colleagues (2020; unpublished pre-print) discovered that people possess a remarkable ability to discriminate between heart rates (HR) of others by merely viewing their faces. Namely, when presented with 10 second videos of two people side-by-side and a square that changes colour at the rate of the HR of one of the people, observers matched the HR to the correct person above the chance level (inter-individual accuracy ranging from 45% to 74%, n = 24). Which exact factors contribute to this ability remain to be disentangled. Galvez-Pol et al. excluded a simple associative learning explanation by showing that replacing actors with images of shapes disrupted the performance to a chance level. However, performance remained above chance when videos were inverted, replaced with still images of the people, and when colouration in the faces was held constant. Here, we wish to first, replicate the original findings as an online experiment in a larger sample, and second, to shed light on some of the factors that explain the inter-individual variability in this task. In particular, we ask whether the ability to distinguish the HR of other people is related to the ability to accurately perceive one's own HR. The reasoning is that to infer internal states of other people, one needs to have a at least a ‘good enough’ representation of one’s own internal state (Palmer & Tsakiris, 2018). In addition, we ask whether the ability to discriminate others’ HR relates to social intelligence. One could assume that the capacity to infer the internal states of others could aid social interactions, and thus, people who develop better HR discrimination ability also see themselves as more socially adept.

Published
2022
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26. Do you hear what I see? An audio-visual paradigm to assess emotional egocentricity bias.

Author

von Mohr, Mariana, Finotti, Gianluca, Ambroziak, Klaudia B., and Tsakiris, Manos

Subjects
*EGOISM, *EGOCENTRIC bias, *EMOTIONAL state, *RESEARCH bias, *STROOP effect
Abstract

We often use our own emotions to understand other people's emotions. However, emotional egocentric biases (EEB), namely the tendency to use one's own emotional state when relating to others' emotions, may hinder this process, especially when emotions are incongruent. We capitalised on the classic EEB task to develop a new version that is easier to implement and control. Unlike the original EEB task that relies on a combination of private (e.g. touch) and public (e.g. vision) sensory information, our EEB task (AV-EEB) used audio-visual stimuli to evoke congruent/incongruent emotions in participants. Auditory and visual signals are both public, in that they can be shared among individuals, and make the task easier to implement and control. We provide lab-based and online validations of the AV-EEB, and demonstrate a positive relationship between EEB and social negative potency. This new, easily implemented version of the EEB task can accelerate the investigation of egocentricity biases in several research areas. [ABSTRACT FROM AUTHOR]

Published
2020
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