Impact of eye tracker sampling rate on fixation stability measurement

Evita Serpa; Ilze Ceple; Evita Kassaliete; Gunta Krumina

doi:10.1117/12.3022364

18 June 2024 Impact of eye tracker sampling rate on fixation stability measurement

Evita Serpa, Ilze Ceple, Evita Kassaliete, Gunta Krumina

Proceedings Volume 12998, Optics, Photonics, and Digital Technologies for Imaging Applications VIII; 129981L (2024) https://doi.org/10.1117/12.3022364
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

One of the parameters of eye movement recording devices is their sampling rate. It has been widely studied how the sampling rate of eye trackers affects the assessment of saccadic eye movement parameters. It has also been investigated whether the sampling rate of eye trackers affects the duration of fixations and saccade parameters during reading. In studies analyzing fixation stability, measurements are taken at different sampling rates, but how the sampling rate affects this fixation parameter has not been extensively investigated. Fixation stability is commonly quantified using bivariate contour ellipse areas (BCEA). The aim of this study was to determine whether the sampling rate of an eye tracker affects the measurement of fixation stability. Participants in the study were adults aged 20 to 30 years. Their eye movements during fixation were recorded using the Tobii Pro Fusion eye tracker. The fixation target was presented on a computer monitor, and eye movements were recorded at three sampling rates: 60 Hz, 120 Hz, and 250 Hz. The results demonstrated strong correlation between the BCEA measurements of each participant across all used sampling rates. However, when analyzing the overall data, there is no significant effect of the sampling rate on fixation stability measurement.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Evita Serpa, Ilze Ceple, Evita Kassaliete, and Gunta Krumina "Impact of eye tracker sampling rate on fixation stability measurement", Proc. SPIE 12998, Optics, Photonics, and Digital Technologies for Imaging Applications VIII, 129981L (18 June 2024); https://doi.org/10.1117/12.3022364

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