The embodied dynamics of perceptual causality: a slippery slope?

Amorim, Michel-Ange; Siegler, Isabelle; Baurès, Robin; Oliveira, Armando M.

doi:10.3389/fpsyg.2015.00483

Cited by 6 publications

(7 citation statements)

References 60 publications

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“…3B) on a table with the image facing upward (toward the ceiling) and viewed from above by the participants. Such a manipulation would induce an expectation of gravity when the stimulus moved from the upper to the lower edge of the display in the vertical screen orientation, but not when it moved in the horizontal screen orientation (Amorim et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

Asymmetric interference in concurrent time-to-contact estimation: Cousin or twin of the psychological refractory period effect?

Baurès

DeLucia

Olson

et al. 2016

Atten Percept Psychophys

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In a reaction time (RT) task requiring fast responses to two stimuli presented close in time, human observers show a delayed RT to the second stimulus. This phenomenon has been attributed to a psychological refractory period (PRP). A similar asymmetric interference is found when performing multiple concurrent visual time-to-contact (TTC) estimations for moving objects, despite important differences between the tasks. In the present study, we studied the properties of the asymmetric interference found in the TTC task and compared them to the classical PRP effect. In Experiment 1, we varied the time interval between the two objects' arrival times to determine the dependence of the PRP-like effect on the asynchrony between the two TTCs. In Experiment 2, we investigated whether the physical or the perceived arrival order determined the asymmetric interference. Our results confirmed the existence of asymmetric interference in the multiple TTC estimation task, but also indicated important differences from the traditional PRP effect observed in the RT paradigm. The origins of these differences are discussed, as well as the practical implications.

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Section: Methodsmentioning

confidence: 99%

Asymmetric interference in concurrent time-to-contact estimation: Cousin or twin of the psychological refractory period effect?

Baurès

DeLucia

Olson

et al. 2016

Atten Percept Psychophys

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“…A separate representation of air drag has the additional advantage that it can be employed for both vertical and horizontal movement components, while an integrated gravity and air drag prior is only viable for free fall. While evidence for the existence of a friction prior for movement on surfaces has been presented (Hubbard, 1995 ; Amorim et al, 2015 ), the role of air resistance and drag-relevant features of objects in perception remain to be studied more systematically.…”

Section: Attunement To Earth Gravity: Interception Performance Under mentioning

confidence: 99%

Gravity as a Strong Prior: Implications for Perception and Action

Jörges

López‐Moliner

2017

Front. Hum. Neurosci.

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In the future, humans are likely to be exposed to environments with altered gravity conditions, be it only visually (Virtual and Augmented Reality), or visually and bodily (space travel). As visually and bodily perceived gravity as well as an interiorized representation of earth gravity are involved in a series of tasks, such as catching, grasping, body orientation estimation and spatial inferences, humans will need to adapt to these new gravity conditions. Performance under earth gravity discrepant conditions has been shown to be relatively poor, and few studies conducted in gravity adaptation are rather discouraging. Especially in VR on earth, conflicts between bodily and visual gravity cues seem to make a full adaptation to visually perceived earth-discrepant gravities nearly impossible, and even in space, when visual and bodily cues are congruent, adaptation is extremely slow. We invoke a Bayesian framework for gravity related perceptual processes, in which earth gravity holds the status of a so called “strong prior”. As other strong priors, the gravity prior has developed through years and years of experience in an earth gravity environment. For this reason, the reliability of this representation is extremely high and overrules any sensory information to its contrary. While also other factors such as the multisensory nature of gravity perception need to be taken into account, we present the strong prior account as a unifying explanation for empirical results in gravity perception and adaptation to earth-discrepant gravities.

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“…However, it is important to perceive how the force of friction acts upon objects, both to predict when they will slow down (Amorim et al, 2015;Hubbard, 1998), but also to predict the onset of movement. Again, imagine a stationary car spinning its wheels in the mudhere it is critical to form a sensitive model of the wheel's frictive interaction with the ground, in order to predict where the car will move next.…”

Section: The Current Study: An Implicit Model Of Friction Drives Spat...mentioning

confidence: 99%

“…However, if the second object continues to move over a great distance (outside the launch's 'radius of action'), then this movement will instead appear driven by an internal force (see also Boyle, 1961;Yela, 1954). For objects seen moving along higher friction surfaces, there is a reduced 'radius of action' beyond which the object begins to look self-propelled (Amorim et al, 2015). Thus, visual impressions of self-propelledness outside of the radius of action suggest the implicit logic that, as an object moves, the force of friction tends to cause it to slow down.…”

Section: Seeing Friction As a Cause Of Movementmentioning

confidence: 99%