keyword
MENU ▼
Read by QxMD icon Read
search

perceptual illusion

keyword
https://www.readbyqxmd.com/read/28720401/multisensory-integration-induces-body-ownership-of-a-handtool-but-not-any-handtool
#1
Veronica Weser, Gianluca Finotti, Marcello Costantini, Dennis R Proffitt
Bodily boundaries are computed by integrating multisensory bodily signals and can be experimentally manipulated using bodily illusions. Research on tool use demonstrates that tools alter body representations motorically to account for changes in a user's action repertoire. The present experiment sought to unify perceptual and motoric accounts of tool embodiment using a modified Rubber Hand Illusion (RHI) that also addressed the skill and practice aspects of the tool use literature. In Experiment 1, synchronous multisensory stimulation induced perceptual embodiment of a tool, chopsticks...
July 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28713323/model-of-illusions-and-virtual-reality
#2
REVIEW
Mar Gonzalez-Franco, Jaron Lanier
In Virtual Reality (VR) it is possible to induce illusions in which users report and behave as if they have entered into altered situations and identities. The effect can be robust enough for participants to respond "realistically," meaning behaviors are altered as if subjects had been exposed to the scenarios in reality. The circumstances in which such VR illusions take place were first introduced in the 80's. Since then, rigorous empirical evidence has explored a wide set of illusory experiences in VR. Here, we compile this research and propose a neuroscientific model explaining the underlying perceptual and cognitive mechanisms that enable illusions in VR...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28712674/the-ebbinghaus-illusion-in-the-gray-bamboo-shark-chiloscyllium-griseum-in-comparison-to-the-teleost-damselfish-chromis-chromis
#3
Theodora Fuss, Vera Schluessel
This is the first study to comparatively assess the perception of the Ebbinghaus-Titchener circles and variations of the Delboeuf illusion in four juvenile bamboo sharks (Chiloscyllium griseum) and five damselfish (Chromis chromis) using identical training paradigms. We aimed to investigate whether these two species show similarities in the perceptual integration of local elements into the global context. The Ebbinghaus-Titchener circles consist of two equally sized central test circles surrounded by smaller or larger circles of different size, number and/or distance...
May 29, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28705456/feeling-touch-on-the-own-hand-restores-the-capacity-to-visually-discriminate-it-from-someone-else-hand-pathological-embodiment-receding-in-brain-damage-patients
#4
Carlotta Fossataro, Valentina Bruno, Patrizia Gindri, Lorenzo Pia, Anna Berti, Francesca Garbarini
The sense of body ownership, i.e., the belief that a specific body part belongs to us, can be selectively impaired in brain-damaged patients. Recently, a pathological form of embodiment has been described in patients who, when the examiner's hand is located in a body-congruent position, systematically claim that it is their own hand (E+ patients). This paradoxical behavior suggests that, in these patients, the altered sense of body ownership also affects their capacity of visually discriminating the body-identity details of the own and the alien hand, even when both hands are clearly visible on the table...
June 23, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28701936/an-adaptation-induced-repulsion-illusion-in-tactile-spatial-perception
#5
Lux Li, Arielle Chan, Shah M Iqbal, Daniel Goldreich
Following focal sensory adaptation, the perceived separation between visual stimuli that straddle the adapted region is often exaggerated. For instance, in the tilt aftereffect illusion, adaptation to tilted lines causes subsequently viewed lines with nearby orientations to be perceptually repelled from the adapted orientation. Repulsion illusions in the nonvisual senses have been less studied. Here, we investigated whether adaptation induces a repulsion illusion in tactile spatial perception. In a two-interval forced-choice task, participants compared the perceived separation between two point-stimuli applied on the forearms successively...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28687327/masking-of-random-walk-motion-by-flicker-and-its-role-in-the-allocation-of-motion-in-the-on-line-jitter-illusion
#6
Adela S Y Park, Phillip A Bedggood, Andrew B Metha, Andrew J Anderson
Typically, perceptual stabilization mechanisms make us unaware of the retinal image motion produced by the small, involuntary eye movements our eyes constantly make during fixation. The breakdown of perceptual stability is demonstrated by the on-line jitter illusion, in which a circular static pattern appears to jitter coherently when surrounded by a flickering annular pattern. Although both regions of the stimulus are subject to retinal motion from eye movements, the visual system attributes this motion to the central static region in the form of visual jitter, while the surrounding flickering region remains perceptually stable...
July 13, 2017: Vision Research
https://www.readbyqxmd.com/read/28676740/modulation-of-illusory-auditory-perception-by-transcranial-electrical-stimulation
#7
Giulia Prete, Anita D'Anselmo, Luca Tommasi, Alfredo Brancucci
The aim of the present study was to test whether transcranial electrical stimulation can modulate illusory perception in the auditory domain. In two separate experiments we applied transcranial Direct Current Stimulation (anodal/cathodal tDCS, 2 mA; N = 60) and high-frequency transcranial Random Noise Stimulation (hf-tRNS, 1.5 mA, offset 0; N = 45) on the temporal cortex during the presentation of the stimuli eliciting the Deutsch's illusion. The illusion arises when two sine tones spaced one octave apart (400 and 800 Hz) are presented dichotically in alternation, one in the left and the other in the right ear, so that when the right ear receives the high tone, the left ear receives the low tone, and vice versa...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28672367/pupil-dilation-to-illusory-motion-in-peripheral-drift-images-perception-versus-reality
#8
Steve Beukema, Jay A Olson, Ben J Jennings, Frederick A A Kingdom
Peripheral drift is a specific type of illusory motion that causes observers to perceive motion in a static image. We aimed to determine whether pupil dilation occurs during the perception of illusory motion. In three experiments investigating pupil-size changes to peripheral drift, pupil response differences were observed between symmetric patterns (SPs) that elicited no impression of motion and repeated asymmetric patterns (RAPs) that did. All participants reported the perception of motion in the RAP condition and showed significantly greater pupil dilation to these stimuli as compared with viewing stimuli in the SP condition...
July 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28663196/the-triple-flash-illusion-reveals-a-driving-role-of-alpha-band-reverberations-in-visual-perception
#9
Rasa Gulbinaite, Barkın İlhan, Rufin VanRullen
The modulatory role of spontaneous brain oscillations on perception of threshold-level stimuli is well established. Here, we provide evidence that alpha-band (∼10 Hz) oscillations not only modulate perception of threshold-level sensory inputs, but also can drive perception and generate percepts without a physical stimulus being present. We used the "triple-flash" illusion: Occasional perception of three flashes when only two spatially-coincident veridical ones, separated by ∼100 ms, are presented. The illusion was proposed to result from superposition of two hypothetical oscillatory impulse response functions (IRF) generated in response to each flash: When the delay between flashes matches the period of the oscillation, the superposition enhances a later part of the oscillation that is normally damped; when this enhancement crosses perceptual threshold, a third flash is erroneously perceived (Bowen, 1989)...
June 29, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28634457/perceptual-categories-derived-from-reid-s-common-sense-philosophy
#10
Adam Reeves, Birgitta Dresp-Langley
The 18th-century Scottish 'common sense' philosopher Thomas Reid argued that perception can be distinguished on several dimensions from other categories of experience, such as sensation, illusion, hallucination, mental images, and what he called 'fancy.' We extend his approach to eleven mental categories, and discuss how these distinctions, often ignored in the empirical literature, bear on current research. We also score each category on five properties (ones abstracted from Reid) to form a 5 × 11 matrix, and thus can generate statistical measures of their mutual dependencies, a procedure that may have general interest as illustrating what we can call 'computational philosophy...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28619233/do-we-have-distinct-systems-for-immediate-and-delayed-actions-a-selective-review-on-the-role-of-visual-memory-in-action
#11
REVIEW
Thomas Schenk, Constanze Hesse
The perception-action model with its assumptions of distinct visual pathways for perception and visuomotor control has been highly influential but also contentious. The controversy largely focused on the evidence from studies on perceptual illusions and this scientific field has been reviewed quite a few times in recent years. In contrast another aspect of the model, namely the role of visual memory in action control, received comparatively little attention. With respect to visual memory the perception-action model proposes that only the perceptual or ventral stream can maintain a sustained representation of the visual world while the visuomotor system or dorsal stream has to rely on currently available visual information...
May 25, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28611387/visuotactile-integration-modulates-motor-performance-in-a-perceptual-decision-making-task
#12
Klaudia Grechuta, Jelena Guga, Giovanni Maffei, Belen Ballester Rubio, Paul F M J Verschure
Body ownership is critically dependent on multimodal integration as for instance revealed in the Rubber Hand Illusion (RHI) and a number of studies which have addressed the neural correlates of the processes underlying this phenomenon. Both experimental and clinical research have shown that the structures underlying body ownership seem to significantly overlap with those of motor control including the parietal and ventral premotor cortices, Temporal Parietal Junction (TPJ) and the insula. This raises the question of whether this structural overlap between body ownership and motor control structures is of any functional significance...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28603772/compensatory-shifts-in-visual-perception-are-associated-with-hallucinations-in-lewy-body-disorders
#13
Alan Robert Bowman, Vicki Bruce, Christopher J Colbourn, Daniel Collerton
Visual hallucinations are a common, distressing, and disabling symptom of Lewy body and other diseases. Current models suggest that interactions in internal cognitive processes generate hallucinations. However, these neglect external factors. Pareidolic illusions are an experimental analogue of hallucinations. They are easily induced in Lewy body disease, have similar content to spontaneous hallucinations, and respond to cholinesterase inhibitors in the same way. We used a primed pareidolia task with hallucinating participants with Lewy body disorders (n = 16), non-hallucinating participants with Lewy body disorders (n = 19), and healthy controls (n = 20)...
2017: Cognitive Research: Principles and Implications
https://www.readbyqxmd.com/read/28596601/ebbinghaus-figures-that-deceive-the-eye-do-not-necessarily-deceive-the-hand
#14
Hester Knol, Raoul Huys, Jean-Christophe Sarrazin, Andreas Spiegler, Viktor K Jirsa
In support of the visual stream dissociation hypothesis, which states that distinct visual streams serve vision-for-perception and vision-for-action, visual size illusions were reported over 20 years ago to 'deceive the eye but not the hand'. Ever since, inconclusive results and contradictory interpretations have accumulated. Therefore, we investigated the effects of the Ebbinghaus figure on repetitive aiming movements with distinct dynamics. Participants performed a Fitts' task in which Ebbinghaus figures served as targets...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28594272/the-future-is-now-the-impact-of-present-fluency-in-judgments-about-the-future
#15
Tomás A Palma, Ana Sofia Santos, Leonel Garcia-Marques
Recent research has emphasised the role of episodic memory in both remembering past events and in envisaging future events. On the other hand, it has been repeatedly shown that judgments about past events are affected by the fluency with which retrieval cues are processed. In this paper we investigate whether perceptual fluency also plays a role in judgments about future events. For this purpose we conducted four experiments. The first experiment replicated recent findings showing that stimuli that are processed fluently tend to be wrongly recognised as having been encountered in the past outside the laboratory walls [Brown, A...
June 8, 2017: Memory
https://www.readbyqxmd.com/read/28588457/sensitivity-to-an-illusion-of-sound-location-in-human-auditory-cortex
#16
Nathan C Higgins, Susan A McLaughlin, Sandra Da Costa, G Christopher Stecker
Human listeners place greater weight on the beginning of a sound compared to the middle or end when determining sound location, creating an auditory illusion known as the Franssen effect. Here, we exploited that effect to test whether human auditory cortex (AC) represents the physical vs. perceived spatial features of a sound. We used functional magnetic resonance imaging (fMRI) to measure AC responses to sounds that varied in perceived location due to interaural level differences (ILD) applied to sound onsets or to the full sound duration...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28578638/temporal-processing-deficit-leads-to-impaired-multisensory-binding-in-schizophrenia
#17
Mikhail Zvyagintsev, Carmen Parisi, Klaus Mathiak
INTRODUCTION: Schizophrenia has been characterised by neurodevelopmental dysconnectivity resulting in cognitive and perceptual dysmetria. Hence patients with schizophrenia may be impaired to detect the temporal relationship between stimuli in different sensory modalities. However, only a few studies described deficit in perception of temporally asynchronous multisensory stimuli in schizophrenia. METHODS: We examined the perceptual bias and the processing time of synchronous and delayed sounds in the streaming-bouncing illusion in 16 patients with schizophrenia and a matched control group of 18 participants...
June 3, 2017: Cognitive Neuropsychiatry
https://www.readbyqxmd.com/read/28554611/a-mathematical-model-of-embodied-consciousness
#18
David Rudrauf, Daniel Bennequin, Isabela Granic, Gregory Landini, Karl Friston, Kenneth Williford
We introduce a mathematical model of embodied consciousness, the Projective Consciousness Model (PCM), which is based on the hypothesis that the spatial field of consciousness (FoC) is structured by a projective geometry and under the control of a process of active inference. The FoC in the PCM combines multisensory evidence with prior beliefs in memory and frames them by selecting points of view and perspectives according to preferences. The choice of projective frames governs how expectations are transformed by consciousness...
May 26, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28505664/temporal-brightness-illusion-changes-color-perception-of-the-dress
#19
Laila Hugrass, Jana Slavikova, Melissa Horvat, Alaa Al Musawi, David Crewther
"The dress" has provoked intensive commentary among psychophysicists, especially in relation to color vision. Researchers have shown that manipulating illuminance cues can influence the perceived colors of the dress. Here we investigate whether illusory shifts in brightness can shift color perception of the dress. Drifting achromatic gratings with fast off and fast on shading profiles are known to give an illusion of brightening or darkening, respectively. We superimposed rotating sawtooth gratings on a series of dress images that morphed from extreme white/gold through to blue/black...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28496425/verbalizations-affect-visuomotor-control-in-hitting-objects-to-distant-targets
#20
Raimey Olthuis, John Van Der Kamp, Simone Caljouw
There is a long-standing proposal for the existence of two neuroanatomically and functionally separate visual systems; one supported by the dorsal pathway to control action and the second supported by the ventral pathway to handle explicit perceptual judgments. The dorsal pathway requires fast access to egocentric information, while the ventral pathway primarily requires allocentric information. Despite the evidence for functionally distinct systems, researchers have posited important interactions. This paper examines evidence to what degree the interaction becomes more important when target-identity, the perception of which is supported by the ventral stream, is verbalized during the execution of a target-directed far-aiming movement...
2017: Frontiers in Psychology
keyword
keyword
94392
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"