A behavioral task for the validation of a gaze-contingent simulated scotoma

Geringswald, Franziska; Baumgartner, Florian; Pollmann, Stefan

doi:10.3758/s13428-013-0321-6

Cited by 11 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Eye tracking was conducted with an Eyelink 1000 Plus (S. R. Research) sampling at 1,000 Hz and calibrated using 9-point calibration and drift correction before each trial. As reported in Addleman et al (2021), we verified that our simulated scotoma eliminated useful vision at the scotoma location using a previously reported method (Geringswald et al, 2013).…”

Section: Experiments 1 Methodssupporting

confidence: 82%

Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

Da¹,

Vg²

2021

Preprint

View full text Add to dashboard Cite

Central vision loss disrupts voluntary shifts of spatial attention during visual search. Recently, we reported that a simulated scotoma impaired implicit spatial attention towards regions likely to contain search targets. In that task, search items were overlaid on natural scenes. Because natural scenes can induce explicit awareness of learned biases leading to voluntary shifts of attention, here we used a search display with a blank background less likely to induce awareness of target location probabilities. Participants searched both with and without a simulated central scotoma: a training phase contained targets more often in one screen quadrant and a testing phase contained targets equally often in all quadrants. In Experiment 1, training used no scotoma, while testing alternated between blocks of scotoma and no-scotoma search. Experiment 2 training included the scotoma and testing again alternated between scotoma and no-scotoma search. Response times and saccadic behaviors in both experiments showed attentional biases towards the high-probability target quadrant during scotoma and no-scotoma search. Whereas simulated central vision loss impairs implicitly learned spatial attention in the context of natural scenes, our results show that this may not arise from impairments to the basic mechanisms of attentional learning indexed by visual search tasks without scenes.

show abstract

Section: Experiments 1 Methodssupporting

confidence: 82%

Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

Da¹,

Vg²

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Some limitations in the present simulation that may hinder this work are that it is difficult to characterize the accuracy of eye-tracker given the two-step calibration procedure used and the slippage of the HMD on the head. Our assessment criterion in this study was behavioral, and did not require more accurate assessment of the eye tracking system's limits (c.f., Geringswald et al, 2013), but that may not be true of future work.…”

Section: Discussionmentioning

confidence: 91%

Using Virtual Reality to Assess the Street Crossing Behavior of Pedestrians With Simulated Macular Degeneration at a Roundabout

Ashmead

Adams

et al. 2018

Front. ICT

View full text Add to dashboard Cite

This work investigates how pedestrian street crossing behavior at a virtual traffic roundabout is affected by central visual field loss. We exposed participants with normal vision to a first-person virtual experience of central visual field loss of variable size in the form of a simulated scotoma, an area of the visual field with degraded visual acuity. A larger size of scotoma influenced people to select longer gaps between traffic, and to wait longer before initiating a crossing. In addition, a gender difference was found for risk taking behavior. Male subjects tended to take more risk, as indicated by the selection of shorter gaps in traffic and a shorter delay before the initiation of a crossing. Our findings generally replicate those of studies done in real-world conditions using participants afflicted with genuine central vision loss, supporting the hypothesis that virtual reality is a safe and accessible alternative for investigating similar issues of public concern.

show abstract

“…The scotoma validation task was based on a search-discrimination task that uses Landolt C stimuli and requires high-acuity foveal vision in normal viewing. 23 The task consisted of 4 blocks with 32 stimuli each, in the first and third block participants searched without scotoma simulation, in the second and fourth block participants searched with simulated central scotoma (solid gray disk with a radius of 5° visual angle as in the main experiment). At the beginning of each trial, a fixation cross was presented at the center of the screen for 1000 ms, followed by a Landolt C (i.e.…”

Section: Methodsmentioning

confidence: 99%

Intact Contextual Cueing for Search in Realistic Scenes with Simulated Central or Peripheral Vision Loss

Pollmann

Geringswald

Wei

et al. 2020

Trans. Vis. Sci. Tech.

Self Cite

View full text Add to dashboard Cite

Search in repeatedly presented visual search displays can benefit from implicit learning of the display items' spatial configuration. This effect has been named contextual cueing. Previously, contextual cueing was found to be reduced in observers with foveal or peripheral vision loss. Whereas this previous work used symbolic (T among L-shape) search displays with arbitrary configurations, here we investigated search in realistic scenes. Search in meaningful realistic scenes may benefit much more from explicit memory of the target location. We hypothesized that this explicit recall of the target location reduces visuospatial working memory demands on search considerably, thereby enabling efficient search guidance by learnt contextual cues in observers with vision loss. Methods: Two experiments with gaze-contingent scotoma simulation (Experiment 1: central scotoma, Experiment 2: peripheral scotoma) were carried out with normalsighted observers (total n = 39/40). Observers had to find a cup in pseudorealistic indoor scenes and discriminate the direction of the cup's handle. Results: With both central and peripheral scotoma simulation, contextual cueing was observed in repeatedly presented configurations. Conclusions: The data show that patients suffering from central or peripheral vision loss may benefit more from memory-guided visual search than would be expected from scotoma simulation and patient studies using abstract symbolic search displays. Translational Relevance: In the assessment of visual search in patients with vision loss, semantically meaningless abstract search displays may gain insights into deficient search functions, but more realistic meaningful search scenes are needed to assess whether search deficits can be compensated.

show abstract

A behavioral task for the validation of a gaze-contingent simulated scotoma

Cited by 11 publications

References 34 publications

Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

Using Virtual Reality to Assess the Street Crossing Behavior of Pedestrians With Simulated Macular Degeneration at a Roundabout

Intact Contextual Cueing for Search in Realistic Scenes with Simulated Central or Peripheral Vision Loss

Contact Info

Product

Resources

About