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Pseudoneglect

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https://www.readbyqxmd.com/read/27916670/pseudoneglect-in-line-bisection-judgement-is-associated-with-a-modulation-of-right-hemispheric-spatial-attention-dominance-in-right-handers
#1
Laure Zago, Laurent Petit, Gael Jobard, Julien Hay, Bernard Mazoyer, Nathalie Tzourio-Mazoyer, Hans-Otto Karnath, Emmanuel Mellet
The objective of this study was to validate a line bisection judgement (LBJ) task for use in investigating the lateralized cerebral bases of spatial attention in a sample of 51 right-handed healthy participants. Using functional magnetic resonance imaging (fMRI), the participants performed a LBJ task that was compared to a visuomotor control task during which the participants made similar saccadic and motoric responses. Cerebral lateralization was determined using a voxel-based functional asymmetry analysis and a hemispheric functional lateralization index (HFLI) computed from fMRI contrast images...
December 1, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27598252/developmental-trajectory-of-pseudoneglect-in-adults-using-the-greyscales-task
#2
Trista E Friedrich, Paulette V Hunter, Lorin J Elias
Neurologically healthy adults display a reliable but slight leftward spatial bias, and this bias appears to change with age (Jewell & McCourt, 2000). Studies using line bisection and the landmark task to investigate pseudoneglect in participants over 60 years of age have shown suppression and near reversal of the leftward response bias. The current research investigates the developmental trajectory of perceptual biases using the greyscales task-a task that exhibits strengths compared to the line bisection and landmark task, as it generates a stronger and more consistent bias...
September 5, 2016: Developmental Psychology
https://www.readbyqxmd.com/read/27461110/representational-pseudoneglect-for-detecting-changes-to-rey-osterrieth-figures
#3
Ellie Aniulis, Owen Churches, Nicole A Thomas, Michael E R Nicholls
When dividing attention between the left and right sides of physical space, most individuals pay slightly more attention to the left side. This phenomenon, known as pseudoneglect, may also occur for the left and right sides of mental representations of stimuli. Representational pseudoneglect has been shown for the recall of real-world scenes and for simple, briefly presented stimuli. The current study sought to investigate the effect of exposure duration and complexity using adaptations of the Rey-Osterrieth figures...
July 26, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27150618/an-investigation-of-the-mechanisms-underlying-the-effects-of-viewing-distance-and-stimulus-length-on-attentional-asymmetries-during-line-bisection
#4
Michael E R Nicholls, Emily Beckman, Owen Churches
Clinical neglect patients overattend to stimuli on their right, whereas the general population overattend to the left (pseudoneglect). Both phenomena are affected by viewing distance, whereby the attentional biases are attenuated as the stimulus moves from near to far space. Both are also affected by stimulus length and reduce in strength, or even reverse (the crossover effect), as length decreases. To gain an insight into the cognitive/neural mechanisms that underlie the effects of viewing distance and stimulus length, in two experiments we examined the interaction between the variables...
July 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27089035/social-modulation-of-spatial-judgment-the-case-of-line-bisection-task
#5
Stefania D'Ascenzo, Sandro Rubichi, Gianluca Di Gregorio, Luca Tommasi
Our actions are influenced by the social context in which they are performed, specifically it has been shown that observing others' actions influences the execution of the same action. In the present study, we examined whether and to what extent observers are influenced by the presence and performance of another person in a visual spatial task, using a line bisection paradigm in which two participants performed the task in turns while sitting in front of each other. Thirty pairs of participants took part in the experiment, which was divided into a non-social and a social session...
June 2016: Acta Psychologica
https://www.readbyqxmd.com/read/27008246/allocentric-but-not-egocentric-pseudoneglect-of-peripersonal-space
#6
Tigran Kesayan, John B Williamson, Adam D Falchook, Frank M Skidmore, Kenneth M Heilman
BACKGROUND AND OBJECTIVE: Healthy adults often deviate leftward on line bisection tasks (allocentric pseudoneglect) but rightward on body part bisection tasks (egocentric pseudoneglect). People visually estimate distance in peripersonal space by comparing the distance to the length of a body part such as an arm's length (an egocentric reference) or using standard units of distance such as inches (an allocentric reference). Our objective was to learn whether people have pseudoneglect when estimating distances in peripersonal space using egocentric versus allocentric reference frames...
March 2016: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/26954488/minding-gaps-on-the-skin-opposite-bisection-biases-on-forehead-and-back-of-one-s-head
#7
Bigna Lenggenhager, Christine Busch, Peter Brugger
Humans perceive the world from an egocentric perspective, while being able to mentally take a third person's perspective. Graphesthesia tasks revealed that letters written on the back of one's own head are consistently perceived from an embodied perspective, while the perspective on one's front is less consistent and often disembodied. We developed a cutaneous gap bisection task as a more discrete measure of the perspective on the body. In analogy to a visual pseudoneglect, we expected bisections to deviate toward the left ear when perceived from an embodied perspective...
May 2016: Consciousness and Cognition
https://www.readbyqxmd.com/read/26922505/the-influence-of-baseline-directional-differences-in-pseudoneglect-on-distractibility
#8
Nicole A Thomas, Ellie Aniulis, Michael E R Nicholls
Neurologically normal individuals demonstrate a reliable bias to the left side of space, known as pseudoneglect. The magnitude of this attentional asymmetry varies, depending on factors such as location within the visual field. Prior research has shown that the presence of distractors in the upper visual field increase leftward biases. The current study investigated whether brief distractors in the periphery, which recruit exogenous attention influence the strength of pseudoneglect. In addition, to further investigate the interaction of vertical and horizontal attentional asymmetries, a vertical landmark task with horizontally presented distractors was also performed...
April 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/26847405/what-s-in-a-line-verbal-facial-and-emotional-influences-on-the-line-bisection-task
#9
Bianca Hatin, Laurie Sykes Tottenham
In Bryden and MacRae's [(1988). Dichotic laterality effects obtained with emotional words. Neuropsychiatry, Neuropsychology, and Behavioral Neurology, 1(3), 171-176] dichotic listening task, attending to verbal (left hemisphere) or emotional (right hemisphere) auditory stimuli can result in opposite patterns of behaviour. We examined whether performance on the line bisection task might also be influenced in opposite ways by left- and right-lateralized functions. The line bisection task is a simple and effective measure of visuospatial bias...
February 5, 2016: Laterality
https://www.readbyqxmd.com/read/26799680/adult-developmental-trajectories-of-pseudoneglect-in-the-tactile-visual-and-auditory-modalities-and-the-influence-of-starting-position-and-stimulus-length
#10
Joanna L Brooks, Stephen Darling, Catia Malvaso, Sergio Della Sala
Pseudoneglect is a tendency to pay more attention to the left side of space, typically demonstrated on tasks like visuo-spatial line bisection, tactile rod bisection and the mental representation of numbers. The developmental trajectory of this bias on these three tasks is not fully understood. In the current study younger participants aged between 18 and 40 years of age and older participants aged between 55 and 90 years conducted three spatial tasks: (1) visuospatial line bisection - participants were asked to bisect visually presented lines of different lengths at the perceived midpoint; (2) touch-driven tactile rod bisection in the absence of vision - participants were asked to feel the length of a wooden rod with their index finger and bisect the rod at the perceived centre; and (3) mental number line bisection in the absence of vision - participants were asked to listen to a pair of numbers and respond with the numerical midpoint between the pair...
March 2016: Brain and Cognition
https://www.readbyqxmd.com/read/26562852/deaf-individuals-show-a-leftward-bias-in-numerical-bisection
#11
Zaira Cattaneo, Carlo Cecchetto, Costanza Papagno
Consistent evidence suggests that deaf individuals conceive of numerical magnitude as a left-to-right-oriented mental number line, as typically observed in hearing individuals. When accessing this spatial representation of numbers, normally hearing individuals typically show an attentional bias to the left (pseudoneglect), resembling the attentional bias they show in physical space. Deaf individuals do not show pseudoneglect in representing external space, as assessed by a visual line bisection task. However, whether deaf individuals show attentional biases in representing numerical space has never been investigated before...
January 2016: Perception
https://www.readbyqxmd.com/read/26529579/the-influence-of-distractors-and-numerical-direction-on-mental-number-line-bisection
#12
Nicole A Thomas, Whitney Rose, Michael E R Nicholls
Spatial relationships are used to mentally represent numerical information. We visualize small numbers on the left and large numbers on the right, forming a mental number line. When determining the midpoint between two numbers, healthy participants show a bias to the left, similar to the bias on line bisection. Upper space distractors increase leftward line bisection biases and the current study examined the influence of distractors on mental number line bisection. Participants viewed sequential number triplets, presented concurrently with distractors...
November 3, 2015: Laterality
https://www.readbyqxmd.com/read/26378925/intra-and-inter-task-reliability-of-spatial-attention-measures-in-pseudoneglect
#13
Gemma Learmonth, Aodhan Gallagher, Jamie Gibson, Gregor Thut, Monika Harvey
Healthy young adults display a leftward asymmetry of spatial attention ("pseudoneglect") that has been measured with a wide range of different tasks. Yet at present there is a lack of systematic evidence that the tasks commonly used in research today are i) stable measures over time and ii) provide similar measures of spatial bias. Fifty right-handed young adults were tested on five tasks (manual line bisection, landmark, greyscales, gratingscales and lateralised visual detection) on two different days. All five tasks were found to be stable measures of bias over the two testing sessions, indicating that each is a reliable measure in itself...
2015: PloS One
https://www.readbyqxmd.com/read/26327030/neural-and-behavioral-markers-of-inter-and-intra-hemispheric-communication
#14
Stephanie Simon-Dack
This study examined correlates between a behavioral measure of interhemispheric transfer (IHT), performance on tasks targeting right and left hemispheric functions, and resting electroencephalography (EEG). IHT was measured using the Poffenberger Paradigm, a reaction time (RT) task based on the inference that participants will have speeded RTs to a visual target ipsilateral to the responding hand compared to a contralateral target. The neural processes indexed by this crossed-uncrossed difference (CUD) is debated in the literature due to its high variability...
2015: Journal of Vision
https://www.readbyqxmd.com/read/26188312/dissociation-between-line-bisection-and-mental-number-line-bisection-in-healthy-adults
#15
Francesca Rotondaro, Sheila Merola, Marilena Aiello, Mario Pinto, Fabrizio Doricchi
Healthy adults bisect visual horizontal lines slightly to the left of their true center. This bias has been termed "pseudoneglect" and is considered to reflect right hemisphere dominance in the orienting of spatial attention. A previous investigation reported a positive correlation between pseudoneglect and a corresponding negative bias towards numbers lower than the true midpoint, i.e. supposedly to the left of the midpoint, during the mental bisection of number intervals that were defined by two visual arabic digits presented one to the left and one to the right of a horizontal line (Longo and Lourenco, 2007, Neuropsychologia, 45, 7, 1400-1407)...
August 2015: Neuropsychologia
https://www.readbyqxmd.com/read/25911128/testing-the-inter-hemispheric-competition-account-of-visual-extinction-with-combined-tms-fmri
#16
Pierre Petitet, MaryAnn P Noonan, Holly Bridge, Jill X O'Reilly, Jacinta O'Shea
Theoretical models of visual neglect and extinction entail claims about the normal functioning of attention and parietal cortex in the healthy brain: (1) 'pseudoneglect', a commonly observed attentional bias towards left space, reflects the greater dominance of parietal cortex activity of the right versus left hemisphere; (2) the capacity to distribute attention bilaterally depends causally on the relative balance of parietal activity between the hemispheres; (3) disruption of the dominant right parietal cortex shifts this inter-hemispheric balance leftward, causing a rightward shift in attentional bias...
July 2015: Neuropsychologia
https://www.readbyqxmd.com/read/25859206/shaping-pseudoneglect-with-transcranial-cerebellar-direct-current-stimulation-and-music-listening
#17
Silvia Picazio, Chiara Granata, Carlo Caltagirone, Laura Petrosini, Massimiliano Oliveri
Non-invasive brain stimulation modulates cortical excitability depending on the initial activation state of the structure being stimulated. Combination of cognitive with neurophysiological stimulations has been successfully employed to modulate responses of specific brain regions. The present research combined a neurophysiological pre-conditioning with a cognitive conditioning stimulation to modulate behavior. We applied this new state-dependency approach to investigate the cerebellar role in musical and spatial information processing, given that a link between musical perception and visuo-spatial abilities and a clear cerebellar involvement in music perception and visuo-spatial tasks have been reported...
2015: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/25621581/-pseudoextinction-asymmetries-in-simultaneous-attentional-selection
#18
Patrick T Goodbourn, Alex O Holcombe
We report robust visual-field asymmetries associated with selecting simultaneous targets. One letter embedded in a rapid serial visual presentation (RSVP) of letters was encircled by a white ring, cueing it as the target to report. In some conditions, 2 RSVP streams were presented concurrently, and targets appeared simultaneously in both. When only 1 stream was cued, performance was similar regardless of whether it was in the left or right visual field. Cueing 2 streams barely affected performance in the left stream, but performance in the right stream suffered markedly...
April 2015: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/25537526/native-reading-direction-influences-lateral-biases-in-the-perception-of-shape-from-shading
#19
Austen K Smith, Izabela Szelest, Trista E Friedrich, Lorin J Elias
Although neurologically normal individuals often exhibit leftward biases of perception and attention, known as pseudoneglect, factors such as lighting, spatial location and native reading direction have been found to modulate these biases. To investigate lighting and spatial biases in left-to-right and right-to-left readers search times were measured in a target finding task where lighting and target locations were manipulated. Target search times under upper-left lighting were significantly shorter than lower-left, upper-right and lower-right lighting among left-to-right readers...
2015: Laterality
https://www.readbyqxmd.com/read/25505645/behavioural-asymmetries-on-the-greyscales-task-the-influence-of-native-reading-direction
#20
Trista E Friedrich, Lorin J Elias
Reliable leftward attentional and perceptual biases demonstrated in a variety of visuospatial tasks have been found to deviate from the left in research examining the influence of scanning habits. The aim of the current research was to examine the influence of native script direction on pseudoneglect during the greyscales task in a representative sample of native right-to-left readers. Fifty-four native left-to-right readers and 43 right-to-left readers completed the greyscales task, which required judging the darker of two left-right mirrored brightness gradients...
2014: Culture and Brain
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