An improved algorithm for automatic detection of saccades in eye movement data and for calculating saccade parameters
- 1 August 2010
- journal article
- Published by Springer Science and Business Media LLC in Behavior Research Methods
- Vol. 42 (3), 701-708
- https://doi.org/10.3758/brm.42.3.701
Abstract
This analysis of time series of eye movements is a saccade-detection algorithm that is based on an earlier algorithm. It achieves substantial improvements by using an adaptive-threshold model instead of fixed thresholds and using the eye-movement acceleration signal. This has four advantages: (1) Adaptive thresholds are calculated automatically from the preceding acceleration data for detecting the beginning of a saccade, and thresholds are modified during the saccade. (2) The monotonicity of the position signal during the saccade, together with the acceleration with respect to the thresholds, is used to reliably determine the end of the saccade. (3) This allows differentiation between saccades following the main-sequence and non-main-sequence saccades. (4) Artifacts of various kinds can be detected and eliminated. The algorithm is demonstrated by applying it to human eye movement data (obtained by EOG) recorded during driving a car. A second demonstration of the algorithm detects microsleep episodes in eye movement data.Keywords
This publication has 13 references indexed in Scilit:
- The role of driver sleepiness in car crashes: a systematic review of epidemiological studiesAccident Analysis & Prevention, 2000
- Factors associated with falling asleep at the wheel among long-distance truck driversAccident Analysis & Prevention, 2000
- Sleepiness, Driving, and Motor Vehicle CrashesJAMA, 1998
- An automated and modified technique for testing the retinal function (Arden test) by use of the electro-oculogram (EOG) for clinical and research use.Documenta Ophthalmologica, 1998
- An algorithm separating saccadic from nonsaccadic eye movements automatically by use of the acceleration signalVision Research, 1992
- A fuzzy set theoretical approach to automatic analysis of nystagmic eye movementsIEEE Transactions on Biomedical Engineering, 1989
- Overlapping saccades and glissades are produced by fatigue in the saccadic eye movement systemExperimental Neurology, 1975
- The main sequence, a tool for studying human eye movementsMathematical Biosciences, 1975
- Das Einschlaferleben und seine neurophysiologischen KorrelateArchiv Fur Psychiatrie Und Nervenkrankheiten, 1964
- Horizontal eye movements at the onset of sleep.Psychological Review, 1929