Spatial frequency and visual discomfort

O’Hare, Louise; Hibbard, Paul B.

doi:10.1016/j.visres.2011.06.002

Cited by 83 publications

(98 citation statements)

References 52 publications

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“…This finding is consistent with research on the dose-response curve for the impact of tree cover density on stress reduction [13]. It is important to note that these perceptual and neural mechanisms are believed to be "automatic" and consistent across individuals and populations in the absence of disorders [1,3,5,14,17,26,27].…”

Section: Psychology Of Scene Perception and Preferencesupporting

confidence: 80%

“…with modern advancements in smartphone technology. We take into account a diverse set of literature looking at (1) visual reward circuits in the human brain that preferentially respond to some types of scenes [5], (2) how the human brain processes visual characteristics of scenes [27], and (3) the way that images of the environment may be analyzed and related to the activation of neural circuits responsible for positive and negative emotions [14,17,27].…”

Section: Psychology Of Scene Perception and Preferencementioning

confidence: 99%

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EnviroPulse

Valtchanov

Hancock

2015

Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems

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Interacting with nature is beneficial to a person's mentalstate, but it can sometimes be difficult to find environments that will induce positive affect (e.g., when planning a run). In this paper, we describe EnviroPulse-a system for automatically determining and communicating the expected affective valence (EAV) of environments to individuals. We describe a prototype that allows this to be used in realtime on a smartphone, but EnviroPulse could easily be incorporated into GPS systems, mapping services, or imagebased systems. Our work differs from existing work in affective computing in that, rather than detecting a user's affect directly, we automatically determine the EAV of the environment through visual analysis. We present results that suggest our system can determine the EAV of environments. We also introduce real-time affective visual feedback of the calculated EAV of images, and present results from an informal study suggesting that real-time visual feedback can be used for induction of affect.

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Section: Psychology Of Scene Perception and Preferencesupporting

confidence: 80%

Section: Psychology Of Scene Perception and Preferencementioning

confidence: 99%

EnviroPulse

Valtchanov

Hancock

2015

Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems

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“…By exchanging the phase and amplitude of comfortable and uncomfortable images, they showed that the discomfort was determined by the amplitude rather than the phase information. O'Hare and Hibbard 15 used images constructed from filtered noise and controlled for the apparent contrast of the stimuli. They also found that an excess of energy at mid-spatial frequencies determined discomfort ratings, although with a spatial frequency tuning that was slightly lower than that obtained by Fernandez and Wilkins.…”

Section: Visual Discomfort and 1/fmentioning

confidence: 99%

A physiological basis for visual discomfort: Application in lighting design

Wilkins

2015

Lighting Research & Technology

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Visual discomfort occurs when the statistics of the retinal image depart from those of natural scenes, particularly in respect of an excess energy at spatial frequencies close to 3 cycles/degree. Computer models suggest that uncomfortable stimuli are processed with a larger and less sparse neural response. Uncomfortable stimuli usually evoke a relatively large oxygenation of the visual cortex of the brain, consistent with inefficient neural encoding. The discomfort may be homeostatic. The neural computation that sustains sight is therefore likely to be more complex when the visual scene is spatially periodic, when the colour contrast is high or when saccadic suppression is impaired by flicker that is too rapid to be seen.

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“…Individuals with trypophobia report that the visual quality and spatial properties of such stimuli trigger discomfort. [2][3][4][5] This may differ from phobic or aversive responses to a range of other stimuli, such as small animals, where the individual is uncomfortable in the presence of a non-visible animal. It has been suggested that trypophobia involves images with a particular spectral profile rather than clusters of holes per se.…”

Section: Introductionmentioning

confidence: 99%

Trypophobia: an investigation of clinical features

Vlok-Barnard

Stein

2017

Rev. Bras. Psiquiatr.

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Objective: Trypophobia refers to the fear of, or aversion to, clusters of holes. We assessed clinical features of trypophobia and investigated whether it most resembled a specific phobia or obsessivecompulsive disorder. Methods: An online survey was conducted to gather information on sociodemographic variables, course and duration, severity, associated features, comorbid psychiatric diagnoses, and levels of psychological distress and impairment in individuals with trypophobia. The survey also explored whether such individuals experienced more fear or disgust, and whether symptoms showed more resemblance to a specific phobia or to obsessive-compulsive disorder. Associations of symptom severity and duration with degree of impairment were investigated. Results: One hundred and ninety-five individuals completed the questionnaire. Symptoms were chronic and persistent. The most common associated comorbidities were major depressive disorder and generalized anxiety disorder. Trypophobia was associated with significant psychological distress and impairment. The majority of individuals experienced disgust rather than fear when confronted with clusters of holes, but were more likely to meet DSM-5 criteria for specific phobia than for obsessivecompulsive disorder. Symptom severity and duration were associated with functional impairment. Conclusions: Given that individuals with trypophobia suffer clinically significant morbidity and comorbidity, this condition deserves further attention from clinicians and researchers.

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Spatial frequency and visual discomfort

Cited by 83 publications

References 52 publications

EnviroPulse

EnviroPulse

A physiological basis for visual discomfort: Application in lighting design

Trypophobia: an investigation of clinical features

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