Guidelines for Visual-Sensitive EEG Testing
Bibliographic record
Abstract
Adrian & Matthews were likely the first to demonstrate the photic driving response in man. 1 Intermittent photic stimulation (IPS) became an integral part of the electroencephalogram (EEG) after the seminal contributions of Walter et al 2 and Gastaut et al. 3 Because of the considerable variability in the equipment and methods used for IPS, experts in Europe developed a consensus for standardizing techniques. [4][5]5][6] However, The American EEG Society, 7 the International Federation of Clinical Neurophysiology, 8 the Canadian Society for Clinical Neurophysiologists (CSCN) 9 and The American Clinical Neurophysiology Society 10 have only made passing reference to IPS.The European recommendations for IPS 4-6 provide an excellent framework for adoption.The method is demonstrated with video in Zifkin and Kasteleijn-Nolste Trenité. 11With a few minor additions, the guidelines for IPS in this document are identical.In addition, pattern-sensitivity and video games have also been addressed.In this paper, testing for visualsensitivity encompasses IPS, testing for pattern -sensitivity and assessment for video game induced seizures. INTERMITTENT PHOTIC STIMULATION (IPS) Photic StimulatorThe Grass (model PS22) is the gold standard because it has been used in several studies and meets the desired standards, 4-6 although other manufacturers supply similar devices.The European group recommended the following specifications for photic stimulators: 4-6 (i) Maximal intensity ≥ 100 Nit-s per flash, (ii) circular field of diameter 13 cms, (iii) Xenon discharge lamp, (iv) granular diffuser and lamp housing/reflector resulting in a spatial distribution of luminous intensity similar to that of the Grass photic stimulator, (v) No pattern or grid on the stimulator but provision for inserting patterns in front of the diffuser as required and (vi) should deliver single flashes and trains of flashes of constant intensity at frequencies between 1 and 60Hz, (vii) Intensity of 1 joule per flash and luminance of 100 nit-s per flash.As (the flash) stimulator ages, the intensity may change.The granular diffuser reduces the differences related to different flash tubes and stimulator surfaces.Digital EEG systems now usually come with LED-based stimulators.Although LED-based stimulators may not exhibit aging effect, we are uncertain if these stimulators meet the criteria that have been set.Thus, the Schwartzer lamp is a line of several LEDs in a rectangular housing.The spatial distribution of the flashes may not be the same as with a
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.009 | 0.033 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.003 |
| Bibliometrics | 0.006 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.005 | 0.002 |
| Research integrity | 0.009 | 0.007 |
| Insufficient payload (model declined to judge) | 0.015 | 0.018 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".