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Pseudoneglect

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https://www.readbyqxmd.com/read/28872329/sequential-effects-modulate-spatial-biases
#1
Dinis Gökaydin, Peter Brugger, Tobias Loetscher
Healthy individuals usually display a bias toward the left side of space. This effect can be measured in a line bisection task or, alternatively, in a landmark task where prebisected lines are presented to participants. Several factors have been shown to influence pseudoneglect, that is, to vary the magnitude of the left side bias. We performed 2 landmark experiments: 1 online (n = 801) and a 2nd in the laboratory (n = 20). Our results demonstrate that pseudoneglect is strongly modulated by the sequence of trials in a landmark task...
October 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28642729/inconsistent-effects-of-parietal-%C3%AE-tacs-on-pseudoneglect-across-two-experiments-a-failed-internal-replication
#2
Domenica Veniero, Christopher S Y Benwell, Merle M Ahrens, Gregor Thut
Transcranial electrical stimulation (tES) is being investigated as an experimental and clinical interventional technique in human participants. While promising, important limitations have been identified, including weak effect sizes and high inter- and intra-individual variability of outcomes. Here, we compared two "inhibitory" tES-techniques with supposedly different mechanisms of action as to their effects on performance in a visuospatial attention task, and report on a direct replication attempt. In two experiments, 2 × 20 healthy participants underwent tES in three separate sessions testing different protocols (10 min stimulation each) with a montage targeting right parietal cortex (right parietal-left frontal, electrode-sizes: 3cm × 3cm-7 cm × 5 cm), while performing a perceptual line bisection (landmark) task...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28374209/reduced-pseudoneglect-for-physical-space-but-not-mental-representations-of-space-for-adults-with-autistic-traits
#3
Michael C W English, Murray T Maybery, Troy A W Visser
Neurotypical individuals display a leftward attentional bias, called pseudoneglect, for physical space (e.g. landmark task) and mental representations of space (e.g. mental number line bisection). However, leftward bias is reduced in autistic individuals viewing faces, and neurotypical individuals with autistic traits viewing 'greyscale' stimuli, suggestive of atypical lateralization of attention in autism. We investigated whether representational pseudoneglect for individuals with autistic traits is similarly atypically lateralized by comparing biases on a greyscales, landmark, and mental number line task...
July 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28343987/age-related-reduction-of-hemispheric-lateralisation-for-spatial-attention-an-eeg-study
#4
Gemma Learmonth, Christopher S Y Benwell, Gregor Thut, Monika Harvey
A group-level visuospatial attention bias towards the left side of space (pseudoneglect) is consistently observed in young adults, which is likely to be a consequence of right parieto-occipital dominance for spatial attention. Conversely, healthy older adults demonstrate a rightward shift of this behavioural bias, hinting that an age-related reduction of lateralised neural activity may occur within visuospatial attention networks. We compared young (aged 18-25) and older (aged 60-80) adults on a computerised line bisection (landmark) task whilst recording event-related potentials (ERPs)...
June 2017: NeuroImage
https://www.readbyqxmd.com/read/28254649/altered-perceptual-pseudoneglect-in-adhd-evidence-for-a-functional-disconnection-from-early-visual-activation
#5
Jiaqing Chen, Matthias Niemeier
Novel insights into the right-brain dominant functions of spatial attention and visual awareness may come from the peculiar observation that the attentional bias to the left in healthy individuals, called "pseudoneglect," increases with visual noise superimposed onto test stimuli. However, it is unclear if this effect originates from noise activating early visual areas or causing higher-level cognitive interference. Cognitive distraction and load are known to induce neglect-like rightward biases in attention deficit hyperactivity disorder (ADHD)...
February 28, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28242465/related-but-different-examining-pseudoneglect-in-audition-touch-and-vision
#6
Alison F Eardley, Stephen Darling, Paul Dumper, David Browne, Jose Van Velzen
Although researchers have consistently demonstrated a leftward attentional bias in visual and representational (e.g. tactile/mental number line) line bisection tasks, the results from audition have been mixed. Differences in methodology between auditory and visual bisection tasks, especially with regards to the location of stimuli of peripersonal versus extrapersonal space, have also meant that researchers have not been able to compare performance in visual, tactile and auditory line bisection directly. In this research, 39 neurologically typical individuals participated in standard visual and tactile line bisection tasks, together with a newly developed auditory line bisection task...
April 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28063992/cross-modal-influences-on-attentional-asymmetries-additive-effects-of-attentional-orienting-and-arousal
#7
Nicole A Thomas, Alexander J Barone, Alexandra H Flew, Michael E R Nicholls
Attention is asymmetrically distributed across the visual field, such that left side stimuli are more salient, which causes a spatial bias known as pseudoneglect. Although auditory cues can be used to direct visual attention to a location, the influence of auditory distractors on visuospatial asymmetries remains unknown. We examined whether attentional orienting or arousal effects occur when either left or right auditory distractors are presented during the landmark task. We also categorised participants based on the baseline direction of pseudoneglect...
February 2017: Neuropsychologia
https://www.readbyqxmd.com/read/27923149/the-effect-of-cerebral-asymmetries-and-eye-scanning-on-pseudoneglect-for-a-visual-search-task
#8
Michael E R Nicholls, Amelia Hobson, Joanne Petty, Owen Churches, Nicole A Thomas
Pseudoneglect is the tendency for the general population to over-attend to the left. While pseudoneglect is classically demonstrated using line bisection, it also occurs for visual search. The current study explored the influence of eye movements and functional cerebral asymmetry on asymmetries for visual search. In Experiment 1, 24 participants carried out a conjunction search for a target within a rectangular array. A leftward advantage for detecting targets was observed when the eyes were free to move, but not when they were restricted by short exposure durations...
February 2017: Brain and Cognition
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
#9
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...
January 8, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/27598252/developmental-trajectory-of-pseudoneglect-in-adults-using-the-greyscales-task
#10
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...
November 2016: Developmental Psychology
https://www.readbyqxmd.com/read/27461110/representational-pseudoneglect-for-detecting-changes-to-rey-osterrieth-figures
#11
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...
November 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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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...
January 2017: Laterality
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