Abstract:
:Curvature is a highly informative visual cue for shape perception and object recognition. We introduce a novel illusion-the Lemon Illusion-in which subtle illusory curvature is perceived along contour regions that are devoid of physical curvature. We offer several perceptual demonstrations and observations that lead us to conclude that the Lemon Illusion is an instance of a more general illusory curvature phenomenon, one in which the presence of contour curvature discontinuities lead to the erroneous extension of perceived curvature. We propose that this erroneous extension of perceived curvature results from the interaction of neural mechanisms that operate on spatially local contour curvature signals with higher-tier mechanisms that serve to establish more global representations of object shape. Our observations suggest that the Lemon Illusion stems from discontinuous curvature transitions between rectilinear and curved contour segments. However, the presence of curvature discontinuities is not sufficient to produce the Lemon Illusion, and the minimal conditions necessary to elicit this subtle and insidious illusion are difficult to pin down.
journal_name
Front Hum Neuroscijournal_title
Frontiers in human neuroscienceauthors
Strother L,Killebrew KW,Caplovitz GPdoi
10.3389/fnhum.2015.00095subject
Has Abstractpub_date
2015-02-23 00:00:00pages
95issn
1662-5161journal_volume
9pub_type
杂志文章abstract::The Featurally Underspecified Lexicon (FUL) theory predicts that [coronal] is the language universal default place of articulation for phonemes. This assumption has been consistently supported with adult behavioral and event-related potential (ERP) data; however, this underspecification claim has not been tested in de...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2020.580697
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journal_title:Frontiers in human neuroscience
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2014.00817
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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abstract::The relationship between blood oxygenation level dependent-functional magnetic resonance imaging (BOLD-fMRI) and magnetoencephalography (MEG) metrics were explored using low-level visual stimuli known to elicit a rich variety of neural responses. Stimuli were either perceptually isoluminant red/green or luminance-modu...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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abstract::Transcranial direct current stimulation (tDCS) over the primary motor cortex (M1) can facilitate motor learning, but it has not been established how stimulation to other brain regions impacts online and offline motor sequence learning, as well as long-term retention. Here, we completed three experiments comparing the ...
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2013.00274
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2017.00494
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2015.00526
更新日期:2015-10-14 00:00:00
abstract::The catechol-O-methyltransferase (COMT) Val(158)Met polymorphism impacts cortical dopamine (DA) levels and may influence cortical electrical activity in the human brain. This study investigated whether COMT genotype influences resting-state electroencephalogram (EEG) power in the frontal, parietal and midline regions ...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2015.00136
更新日期:2015-04-02 00:00:00
abstract::Background: Extracranial signals are the main source of noise in functional near-infrared spectroscopy (fNIRS) as light is penetrating the cortex but also skin and muscles of the head. Aim: Here we performed three experiments to investigate the contamination of fNIRS measurements by temporal muscle activity. Material ...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2017.00456
更新日期:2017-09-15 00:00:00
abstract::Peripersonal space, as opposed to extrapersonal space, is the space that contains reachable objects and in which multisensory and sensorimotor integration is enhanced. Thus, the perception of peripersonal space requires combining information on the spatial properties of the environment with information on the current ...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2014.00003
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnhum.2015.00282
更新日期:2015-05-26 00:00:00
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2013.00421
更新日期:2013-08-09 00:00:00
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2013.00118
更新日期:2013-04-02 00:00:00
abstract::In this paper, we examined brain activation in subjects during two music listening conditions: listening while simultaneously rating the musical piece being played [Listening and Rating (LR)] and listening to the musical pieces unconstrained [Listening (L)]. Using these two conditions, we tested whether the sequence i...
journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2017.00342
更新日期:2017-06-29 00:00:00
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journal_title:Frontiers in human neuroscience
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2010.00223
更新日期:2010-12-06 00:00:00
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2011.00145
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
doi:10.3389/fnhum.2010.00065
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journal_title:Frontiers in human neuroscience
pub_type: 杂志文章
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更新日期:2008-03-28 00:00:00
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journal_title:Frontiers in human neuroscience
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