Useful Field of View (Online, Oct 2024 Corrected)
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scienceThis is a task in the RobbinGobblin Study study. Click to know more.
Description
The online Useful Field of View task of the Bavelier lab's visual-attention battery (JoVE 'Methods to Test Visual Attention Online' lineage), in the October 2024 corrected version: this code carries both known fixes — the screen/display-size correction ('Fix screen size', 2021) and the extra-frame stimulus-duration fix ('1 suppl frame issue', K. Rioja, Oct 2024) — verified identical to bavelierlab/online-visual-attention HEAD. Each trial presents a brief dual task: a central smiley face whose hair is short or long (respond G/H) and a star flashed at one of 8 peripheral spokes (click the line where it appeared). Stimulus duration follows a staircase with reversals, yielding a processing-speed threshold; planned vs actual presentation durations and frame counts are logged per trial so timing fidelity can be audited. Practice phases gate the main task, and stimulus sizes scale with the credit-card/CD screen calibration (pixels-per-degree). This is a verbatim client-side port of the corrected rg-study code: only the PHP session/database layer was replaced (URL parameters + calibration in localStorage, results downloaded as JSON).
Contact & Lab
Contributors
Citation
- Ball, K., & Owsley, C. (1993). The useful field of view test: A new technique for evaluating age-related declines in visual function. Journal of the American Optometric Association, 64(1), 71–79.
- Yung, A., Cardoso-Leite, P., Dale, G., Bavelier, D., & Green, C. S. (2015). Methods to test visual attention online. Journal of Visualized Experiments, (96), e52470. https://doi.org/10.3791/52470
Credits
Client-side port of the RG-study UFOV (gitlab.unige.ch/bavelierlab/rg-study, online-visual-attention lineage, Oct 2024 corrected version), Brain and Learning Lab (UNIGE).
Target Population
Languages
Run under
Modalities
Task Outputs
Measure useful field of view / visual processing speed under divided attention (staircase threshold, center and peripheral accuracy).
staircase- UFOV threshold (duration at staircase reversals)
- Center-task accuracy (hair length)
- Peripheral localization accuracy
- Planned vs actual stimulus duration error
| Variable | Role | Type | Description | Unit |
|---|---|---|---|---|
frames | metadata | number | Frames used for stimulus presentation | - |
duration | independent | number | Planned stimulus duration | ms |
actualDuration | metadata | number | Actual stimulus duration | ms |
cStim | independent | string | Center target presented (hair length) | - |
cResp | dependent | string | Center response (G/H) | - |
cRT | dependent | number | Center response time | ms |
cCorrectstar | dependent | number | Center correctness | - |
pPos | independent | number | Peripheral target position (0–7) | - |
pResp | dependent | number | Clicked spoke | - |
pRT | dependent | number | Peripheral response time | ms |
pCorrectstar | dependent | number | Peripheral correctness | - |
reversals | metadata | number | Staircase reversals so far | - |
pxperdeg | metadata | number | Pixels per degree from calibration | - |
Administration
- Duration
- ≈ 15 min
- Sessions
- 1
- Input
- keyboardmouse
- Audio
- no audio
- Adaptivity
- staircase
- Pause / resume
- cancelNo
- Practice phase
- check_circleYes
- Offline-capable
- check_circleYes
- Sessions notes
- Administered at pre-test and post-test in the RobbinGobblin study; each administration is a single sitting.
Provenance
Source: nccr-seed
Fetched: 2026-09-07
Last verified: 2026-09-07 — passed