Dataset supplementing Einhäuser, W., Atzert, C., & Nuthmann, A. (2020). Fixation durations in natural scene viewing are guided by peripheral scene content. Journal of Vision.

These files supplement the publication

Einhäuser, W., Atzert, C., & Nuthmann, A. (2020). Fixation durations in natural scene viewing are guided by peripheral scene content. Journal of Vision.

The files fixationsByImg_Exp1.mat, fixationsByImg_Exp2.mat and saccadesByImage_Exp2.mat are Matlab (The MathWorks, Inc.) data files that contain the data as described below. To exemplify their usage, the functions figure2.m through figure5.m output the paper’s data figures. All functions were tested using Matlab version 9.6.0 (R2019a) on Windows 10 and on Ubuntu 14.04.

All files can be used free of charge for scientific purposes, provided the aforementioned publication is appropriately cited.

fixations_Exp1.mat contains the variables describing each fixation of experiment 1

dFixByImAndCon - fixation duration in ms
tFixByImAndCon - start time of fixation relative to image onset in ms
xFixByImAndCon - x position on the screen
yFixByImAndCon - y position on the screen

Notes:
- All variables have the dimensions subject (20) x image (60) x colorCondition (2 - grayscale/color) x contrastCondition (5) x fixation number in trial (50).
- dFixByImAndCon(:,:,:,:,1), etc. denotes the first fixation _ending_ after image onset, so tFixByImAndCon(:,:,:,:,1) will be negative.
- missing data are filled by NaN
- x,y position is relative to the screen (1920x1080), not relative to the image, which was presented in the screen center

fixations_Exp2.mat contains the variables describing each fixation of experiment 2

dFixByImAndCon - fixation duration in ms
tFixByImAndCon - start time of fixation relative to image onset in ms
xFixByImAndCon - x position on the screen
yFixByImAndCon - y position on the screen
isModByImAndCon - fixation on unmodified (0) or isoluminant (1) patches
transByImAndCon - codes type of transition
       patch n -> patch n+1
    unmodified -> unmodified   00  (0)
    unmodified -> isoluminant  01  (1)
   isoluminant -> unmodified   10  (10)
   isoluminant -> isoluminant  11  (11)

Notes:
- All variables have the dimensions subject (20) x image (60) x condition (4 - unmodied, isoluminant, center-isoluminant, center-unmodified) x fixation number in trial (50).
- isModByImAndCon is 1 if the fixated region is isoluminant, and 0 if unmodified, nan for fixations outside the image.
- otherwise notation as in fixations_Exp1.mat

saccades_Exp2.mat contains the variables describing each saccade of experiment 2

xFromByImAndCon / yFromByImAndCon - saccade starting coordinate
xToByImAndCon   / yToByImAndCon - saccade starting coordinate

Notes:
- variable dimensions as in fixations_Exp2.mat
- coordinates refer to screen (1920x1080), not to image