ArticleBehavior research methods2026
Correction for the pupil size artifact improves the measurement of fixation drift with a head-mounted pupil tracker.
Article in Behavior research methods, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
1 author.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The exactness of pupil-based video-oculography (pVOG) is limited by the pupil size artifact (PSA), involving shifts in pupil position with changes in pupil diameter. This study investigates PSA's effects on fixation drift measurement and compares two correction methods. The first, the "interpolation method," creates calibrations for different pupil sizes by adjusting illumination and interpolating between them based on the current pupil diameter. The second, the "regression method," uses natural fluctuations in pupil size during fixation to estimate PSA gain via regression, then corrects pupil position accordingly. Here, the regression method was optimized for correcting fixation drift measurements by removing microsaccades and frequency components below 1 Hz and above 15 Hz. PSA was compared with size-related pupil displacements relative to the limbus to better investigate its cause. Pupil dilation caused downward and temporal shifts (PSA gains: 0.23 deg/mm horizontally, 0.62 deg/mm vertically). The PSA affected vertical fixation drifts (R
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.