The main sequence of human optokinetic nystagmus

Kaminiarz, André; Königs, Kerstin; Bremmer, Frank

doi:10.1167/9.8.405

Cited by 2 publications

(1 citation statement)

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“…However, the spatiotemporal characteristics of the fast phase of voluntary (or “look”) nystagmus have been found to be very similar to volitional, visually guided saccades (Kaminiarz, Königs, & Bremmer, 2009). Voluntary nystagmus is a relatively automatic stabilizing gaze pattern resembling alternating slow pursuit periods and fast saccades seen when participants follow particular elements in a horizontally moving array (Kaminiarz, Königs, & Bremmer, 2010; Ter Braak, 1936). Such eye movements appear comparable to the oculomotor pattern adopted when reading scrolling text, and this would suggest that the transition between leftward pursuit and rightward saccade is no more costly than between static fixation and rightward saccade, and therefore, Buettner et al’s (1985) suggestion that the changes can be attributed to difficulty in making these transitions may be overly simplistic.…”

Section: Horizontally Scrolling Textmentioning

confidence: 99%

Oculomotor and linguistic processing effects in reading dynamic horizontally scrolling text.

Harvey¹,

Godwin²,

Fitzsimmons³

et al. 2017

Journal of Experimental Psychology: Human Perception and Perfor

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Two experiments are reported investigating oculomotor behavior and linguistic processing when reading dynamic horizontally scrolling text (compared to reading normal static text). Three factors known to modulate processing time in normal reading were investigated: Word length and word frequency were examined in Experiment 1, and target word predictability in Experiment 2. An analysis of global oculomotor behavior across the 2 experiments showed that participants made fewer and longer fixations when reading scrolling text, with shorter progressive and regressive saccades between these fixations. Comparisons of the linguistic manipulations showed evidence of a dissociation between word-level and sentence-level processing. Word-level processing (Experiment 1) was preserved for the dynamic scrolling text condition with no difference in length and frequency effects between scrolling and static text formats. However, sentence-level integration (Experiment 2) was reduced for scrolling compared to static text in that we obtained no early facilitation effect for predictable words under scrolling text conditions.

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Section: Horizontally Scrolling Textmentioning

confidence: 99%

Oculomotor and linguistic processing effects in reading dynamic horizontally scrolling text.

Harvey¹,

Godwin²,

Fitzsimmons³

et al. 2017

Journal of Experimental Psychology: Human Perception and Perfor

View full text Add to dashboard Cite

show abstract

Task influences on the dynamic properties of fast eye movements

2009

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It is widely debated whether fast phases of the reflexive optokinetic nystagmus (OKN) share properties with another class of fast eye movements, visually guided saccades. Conclusions drawn from previous studies were complicated by the fact that a subject's task influences the exact type of OKN: stare vs. look nystagmus. With our current study we set out to determine in the same subjects the exact dynamic properties (main sequence) of various forms of fast eye movements. We recorded fast phases of look and stare nystagmus as well as visually guided saccades. Our data clearly show that fast phases of look and stare nystagmus differ with respect to their main sequence. Fast phases of stare nystagmus were characterized by their lower peak velocities and longer durations as compared to fast phases of look nystagmus. Furthermore we found no differences between fast phases of stare nystagmus evoked with limited and unlimited dot lifetimes. Visually guided saccades were on the same main sequence as fast phases of look nystagmus, while they had higher peak velocities and shorter durations than fast phases of stare nystagmus. Our data underline the critical role of behavioral tasks (e.g., reflexive vs. intentional) for the exact spatiotemporal characteristics of fast eye movements.

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The main sequence of human optokinetic nystagmus

Cited by 2 publications

References 0 publications

Oculomotor and linguistic processing effects in reading dynamic horizontally scrolling text.

Oculomotor and linguistic processing effects in reading dynamic horizontally scrolling text.

Task influences on the dynamic properties of fast eye movements

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