PubMed HealthSearch

PubMed · 7280560

Measuring deviant eye tracking.

Abstract

The two indices that have been proposed for quantifying the accuracy of smooth-following eye movements are shown to be interchangeable. This algebraic fact will permit comparability of values between laboratories only if workers who employ the signal-to-noise ratio (S/N) as their index measure S and N as the total signal and noise power, respectively, in the eye movement record.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

D T Lykken, W G Iacono, J D Lykken. 1981. Measuring deviant eye tracking.. https://doi.org/10.1093/schbul%2F7.2.204

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Suppression of motion-produced smear during smooth pursuit eye movements.

Humans make smooth tracking eye movements to keep the image of a moving target on the foveal region of the retina and, thereby, maintain acute vision. Although the images of physically stationary background stimuli sweep across the retina during smooth pursuit eye movements, non-pursued targets are usually perceived to be neither moving nor smeared. The lack of perceived movement of background stimuli is generally attributed to a 'cancellation' of the retinal image motion by extraretinal information about the eye movement [1,2]; this information comes primarily from a neural facsimile of the efferent command to move the eyes, augmented by afferent signals from receptors in the extraocular muscles [3,4]. Here, we show that a physically stationary target presented during smooth tracking is perceived to have considerably less smear than a target that moves comparably across the retina, but when the eye is stationary. This result implies that extraretinal signals for pursuit eye movements also contribute to the alleviation of perceived smear for non-tracked, background targets.

Eye Movements

The wagon wheel illusion in movies and reality.

Wheels turning in the movies or in other forms of stroboscopic presentation often appear to be rotating backward. Remarkably, a similar illusion is also seen in continuous light. The occurrence of this perception in the absence of intermittent illumination suggests that we normally see motion, as in movies, by processing a series of visual episodes.

Eye Movements