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Shape-specific preparatory activity mediates attention to targets in human visual cortex

M. Stokes, R. Thompson, A. C. Nobre, J. Duncan
2009 Proceedings of the National Academy of Sciences of the United States of America  
Following an attentional cue, yet before the onset of a visual target, we observed selective activation of target-specific neural subpopulations within shapeprocessing visual cortex (lateral occipital  ...  visual cortex following stimulus offset (17, 18) .  ...  perceptual bias.  ... 
doi:10.1073/pnas.0905306106 pmid:19887644 pmcid:PMC2772815 fatcat:idl456t56nflvpno7cpyf3xgqu

Attention and Unit Formation: A Biased Competition Account of Object-Based Attention [chapter]

Shaun P. Vecera, Marlene Behrmann
2001 Advances in Psychology  
In my biased competition account, I seek to understand how some objects can be segregated and selected over other objects in a complex visual scene.  ...  In the present paper, I outline a biased competition account of object segregation and attention, following similar accounts that have been developed for spatial attention (Desimone and Duncan, 1995) .  ...  Once these segregation processes have operated, perceptual groups then bias the allocation of visual attention.  ... 
doi:10.1016/s0166-4115(01)80026-1 fatcat:ycb4wxerknf3hmjkoprxjspp4q

Effects of prism adaptation on motor-intentional spatial bias in neglect

Paola Fortis, Peii Chen, Kelly M. Goedert, Anna M. Barrett
2011 NeuroReport  
Following two consecutive days of prism adaptation, participants demonstrated a significant improvement in "aiming" spatial bias, with no effect on "where" spatial bias.  ...  The current study investigated whether prism adaptation differentially affects dysfunction in perceptual-attentional "where" versus motorintentional "aiming" bias.  ...  and b: perceptual-attentional "where" bias.  ... 
doi:10.1097/wnr.0b013e32834a3e20 pmid:21817924 pmcid:PMC3165096 fatcat:2jkq2aan4zafzkfmb7dess5ngy

Influence of Expected Reward on Temporal Order Judgment

Mohsen Rakhshan, Vivian Lee, Emily Chu, Lauren Harris, Lillian Laiks, Peyman Khorsand, Alireza Soltani
2019 Journal of Cognitive Neuroscience  
(i.e., perceptual bias).  ...  By comparing reward-induced bias in target selection (i.e., reward bias) during the two experiments, we determined whether reward caused changes in sensory or decision-making processes.  ...  Such an enhancement of visual processing would cause the target on the more rewarding side (better target) to appear earlier even if the both targets appeared on the screen simultaneously (perceptual bias  ... 
doi:10.1162/jocn_a_01516 pmid:31851591 fatcat:q5u6uskhvzcb5ehw5rd6dl4aae

Motor Cost Influences Perceptual Decisions

Encarni Marcos, Ignasi Cos, Benoît Girard, Paul F. M. J. Verschure, Paul L. Gribble
2015 PLoS ONE  
In other words, are perceptual decisions only dependent on the visual stimulus and entirely orthogonal to motor costs?  ...  Perceptual decision making has been widely studied using tasks in which subjects are asked to discriminate a visual stimulus and instructed to report their decision with a movement.  ...  Further experiments following this line of research might help to clarify the possible causes of the lateral bias.  ... 
doi:10.1371/journal.pone.0144841 pmid:26673222 pmcid:PMC4684499 fatcat:slpr5gdzrvdh5anhir2vtwwrlm

Beyond attentional bias: A perceptual bias in a dot-probe task

Bruno R. Bocanegra, Jorg Huijding, René Zeelenberg
2012 Emotion  
what type of information is preferentially processed (i.e., a perceptual bias in spatial frequency).  ...  We found that a bilateral fearful face cue, compared with a bilateral neutral face cue, speeded up responses to LSF targets and slowed down responses to HSF targets.  ...  We ran follow-up t tests after median splits on the anxiety measures to assess whether the attentional and perceptual biases were present or absent in the low-anxiety groups.  ... 
doi:10.1037/a0028415 pmid:22642346 fatcat:5mhcalyj3fci5etixiotiuck5q

A computational theory of visual attention

C. Bundesen
1998 Philosophical Transactions of the Royal Society of London. Biological Sciences  
A computational theory of visual attention is presented.  ...  A recent development (CTVA) combines TVA with a theory of perceptual grouping by proximity. CTVA explains e¡ects of perceptual grouping and spatial distance between items in multi-element displays.  ...  The biased-choice model has been successful in explaining many experimental ¢ndings on e¡ects of visual discriminability and bias in single-stimulus recognition.  ... 
doi:10.1098/rstb.1998.0282 pmid:9770221 pmcid:PMC1692331 fatcat:qpv5py4ajzbinbkk6ns2fgb4tu

Contrasting the Effects of Task Difficulty and Perceptual Load on Auditory Detection Sensitivity in Individuals with Autism

Julian Tillmann, John Swettenham
2018 Journal of Autism and Developmental Disorders  
However, only increasing perceptual load reduced subsequent auditory detection sensitivity. The study confirms that perceptual load, and not task difficulty, modulates selective attention in ASD.  ...  detection sensitivity were contrasted. 14 adolescents with ASD and 16 neurotypical controls performed a visual letter search task under three conditions: low perceptual load, high perceptual load and low  ...  This theory follows from the application of perceptual load theory (Lavie 1995) and its limited-capacity approach to selective attention and perception.  ... 
doi:10.1007/s10803-018-3766-8 pmid:30244392 fatcat:zsm6pmvp4rg6pgasqvofh4fr3y

Perceptual-Load-Induced Selection as a Result of Local Competitive Interactions in Visual Cortex

Ana Torralbo, Diane M. Beck
2008 Psychological Science  
We found that either spatially separating the task-relevant items in a display or placing the target and nontargets in different visual fields increased interference from a distractor that was to be ignored  ...  We propose that interactions among cells in visual cortex that represent nearby stimuli determine the perceptual load of a task, and that manipulations designed to modulate these competitive spatial interactions  ...  in visual cortex), thus resulting in a greater need for top-down biasing to identify the target.  ... 
doi:10.1111/j.1467-9280.2008.02197.x pmid:19000216 pmcid:PMC2585548 fatcat:elpzzf7pcbgjnkdwaoj2owf6ga

Visual perceptual load reduces auditory detection in typically developing individuals but not in individuals with autism spectrum disorders

Julian Tillmann, John Swettenham
2017 Neuropsychology  
Objective: Previous studies examining selective attention in individuals with autism spectrum disorder (ASD) have yielded conflicting results, some suggesting superior focused attention (e.g. on visual  ...  Method: 17 neurotypical (NT) and 15 ASD adolescents performed a visual search task under varying levels of visual perceptual load while simultaneously detecting presence/absence of an auditory tone embedded  ...  on visual selective attention tasks.  ... 
doi:10.1037/neu0000329 pmid:27819451 fatcat:lfqdhuj2pve75kzvxoctk5fezm

Competition explains limited attention and perceptual resources: implications for perceptual load and dilution theories

Paige E. Scalf, Ana Torralbo, Evelina Tapia, Diane M. Beck
2013 Frontiers in Psychology  
Here we review the evidence in favor of a biased competition view of limited resources and relate these ideas to both classic perceptual load theory and dilution theory.  ...  This view of limited capacity can also explain distractor processing, whereby the competitive interactions and bias imposed to resolve the competition determine the extent to which a distractor is processed  ...  Thus, accurate identification of the target (as required by the task) requires selective attention (in the form of a top-down bias); without it, the target cannot be resolved within the visual system.  ... 
doi:10.3389/fpsyg.2013.00243 pmid:23717289 pmcid:PMC3650668 fatcat:lfujpm2otra7lifoxuefvmt4w4

Nontarget objects can influence perceptual processes during object recognition

Mark E. Auckland, Kyle R. Cave, Nick Donnelly
2007 Psychonomic Bulletin & Review  
However, the benefit from context could be explained by response bias, and may not reflect the influence of context on the perceptual processes of recognition or during representation.  ...  We conducted a six-alternative forced choice experiment to measure semantic and perceptual errors. A target object appeared briefly, surrounded by four context objects.  ...  The response biases found here are related to the SOA between non-targets and targets.  ... 
doi:10.3758/bf03194073 pmid:17694922 fatcat:iuuqzbwt4bhcddin24z4xcj25e

Ipsilesional Biases in Saccades but not Perception after Lesions of the Human Inferior Parietal Lobule

Tony Ro, Chris Rorden, Jon Driver, Robert Rafal
2001 Journal of Cognitive Neuroscience  
In the perceptual-manual task, they pressed a button to indicate which stimulus was perceived first. Frontal patients showed appropriate TOJs for visual targets in both tasks.  ...  This reveals a bias in saccade choice after parietal damage that cannot be attributed to deficient visual perception.  ...  That is, such patients show larger biases with the saccade task than with the perceptual-manual task, but they do exhibit some pathological ipsilesional bias for both.  ... 
doi:10.1162/089892901753165836 pmid:11595095 fatcat:5ek2yg56gjb33mbuyden5opisq

The visual system's intrinsic bias and knowledge of size mediate perceived size and location in the dark

Liu Zhou, Zijiang J. He, Teng Leng Ooi
2013 Journal of Experimental Psychology. Learning, Memory and Cognition  
Our third experiment revealed that armed with the explicit knowledge of target size, an observer perceives target locations in the dark following an intrinsic bias-like profile that is shifted slightly  ...  If the intrinsic bias reflects the internal model of visual space-as proposed here-its influence should extend beyond target localization.  ...  tasks, which require attention to select different visual information.  ... 
doi:10.1037/a0033088 pmid:23751007 pmcid:PMC3876294 fatcat:jj2pc2covzbc5joedrx3mmxqsy

Mutual influence between language and perception in multi-agent communication games [article]

Xenia Ohmer, Michael Marino, Michael Franke, Peter König
2022 arXiv   pre-print
Our analyses show that perceptual biases shape semantic categorization and communicative content.  ...  , and (ii) communication protocols, to analyze the effects on visual representations.  ...  Communication game Two agents, sender S and receiver R, play a reference game where one round of the game proceeds as follows: 1. A random object is selected as the target. 4.  ... 
arXiv:2112.14518v3 fatcat:vq35lcfacna2tjcathplogovbm
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