10.5061/DRYAD.B54GP
Marlow, Colleen A.
University of California System
California Polytechnic State University
Viskontas, Indre V.
University of California, San Francisco
Matlin, Alisa
University of California, San Francisco
Boydston, Cooper
University of Oregon
Boxer, Adam
University of California, San Francisco
Taylor, Richard P.
University of Oregon
Data from: Temporal structure of human gaze dynamics is invariant during
free viewing
Dryad
dataset
2016
scale invariance
gaze shifts
random walk processses
Eye movements
2016-09-16T00:00:00Z
en
https://doi.org/10.1371/journal.pone.0139379
3514488 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
We investigate the dynamic structure of human gaze and present an
experimental study of the frequency components of the change in gaze
position over time during free viewing of computer-generated fractal
images. We show that changes in gaze position are scale-invariant in time
with statistical properties that are characteristic of a random walk
process. We quantify and track changes in the temporal structure using a
well-defined scaling parameter called the Hurst exponent, H. We find H is
robust regardless of the spatial complexity generated by the fractal
images. In addition, we find the Hurst exponent is invariant across all
participants, including those with distinct changes to higher order visual
processes due to neural degeneration. The value we find for H of 0.57
shows that the gaze dynamics during free viewing of fractal images are
consistent with a random walk process with persistent movements. Our
research suggests the human visual system may have a common strategy that
drives the dynamics of human gaze during exploration.
Subject and Trial Image dataXcel spreadsheet which lists subjectâ€™s age,
sex, diagnosis and trial. Also listed are the images (along with image
complexity value) for each trial associated with a particular xdat
value.SubjectTrialImageDetails.xlsxY1FilesMatlab Struct array of data for
subject Y1. Contains raweyedata which is of the form [time
pupilrecognition xposition(pix) yposition(pix)] , xdat which is the value
associated with the image and trial which gives the trial letter for the
given data.Y3FilesMatlab Struct array of data for subject Y3. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.Y6FilesMatlab Struct
array of data for subject Y6. Contains raweyedata which is of the form
[time pupilrecognition xposition(pix) yposition(pix)] , xdat which is the
value associated with the image and trial which gives the trial letter for
the given data.Y7FilesMatlab Struct array of data for subject Y7. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.Y8FilesMatlab Struct
array of data for subject Y8. Contains raweyedata which is of the form
[time pupilrecognition xposition(pix) yposition(pix)] , xdat which is the
value associated with the image and trial which gives the trial letter for
the given data.C2FilesMatlab Struct array of data for subject C2. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.FTD1FilesMatlab
Struct array of data for subject FTD1. Contains raweyedata which is of the
form [time pupilrecognition xposition(pix) yposition(pix)] , xdat which is
the value associated with the image and trial which gives the trial letter
for the given data.FTD3FilesMatlab Struct array of data for subject FTD3.
Contains raweyedata which is of the form [time pupilrecognition
xposition(pix) yposition(pix)] , xdat which is the value associated with
the image and trial which gives the trial letter for the given
data.AD2FilesMatlab Struct array of data for subject AD2. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.AD3FilesMatlab
Struct array of data for subject AD3. Contains raweyedata which is of the
form [time pupilrecognition xposition(pix) yposition(pix)] , xdat which is
the value associated with the image and trial which gives the trial letter
for the given data.Y2FilesMatlab Struct array of data for subject Y2.
Contains raweyedata which is of the form [time pupilrecognition
xposition(pix) yposition(pix)] , xdat which is the value associated with
the image and trial which gives the trial letter for the given
data.Y4FilesMatlab Struct array of data for subject Y4. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.Y5FilesMatlab Struct
array of data for subject Y5. Contains raweyedata which is of the form
[time pupilrecognition xposition(pix) yposition(pix)] , xdat which is the
value associated with the image and trial which gives the trial letter for
the given data.C1FilesMatlab Struct array of data for subject C1. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.C3FilesMatlab Struct
array of data for subject C3. Contains raweyedata which is of the form
[time pupilrecognition xposition(pix) yposition(pix)] , xdat which is the
value associated with the image and trial which gives the trial letter for
the given data.FTD2FilesMatlab Struct array of data for subject FTD2.
Contains raweyedata which is of the form [time pupilrecognition
xposition(pix) yposition(pix)] , xdat which is the value associated with
the image and trial which gives the trial letter for the given
data.FTD4FilesMatlab Struct array of data for subject FTD4. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.FTD5FilesMatlab
Struct array of data for subject FTD5. Contains raweyedata which is of the
form [time pupilrecognition xposition(pix) yposition(pix)] , xdat which is
the value associated with the image and trial which gives the trial letter
for the given data.PSP1FilesMatlab Struct array of data for subject PSP1.
Contains raweyedata which is of the form [time pupilrecognition
xposition(pix) yposition(pix)] , xdat which is the value associated with
the image and trial which gives the trial letter for the given
data.AD1FilesMatlab Struct array of data for subject AD1. Contains
raweyedata which is of the form [time pupilrecognition xposition(pix)
yposition(pix)] , xdat which is the value associated with the image and
trial which gives the trial letter for the given data.