The files below provide individual observer data for each condition.
The files are tab-delimited tables, each N rows x 3 columns, where N depends on the condition: 45
degree context angle, binocular condition, N = 150; 90 degree context angle,
binocular condition, N = 120;
180 degree context angle, binocular condition, N = 90; all monocular conditions, N = 60.
The first column is
the trial-by-trial luminance of the tab in cd/m^2,
in the order that they were presented in the experiment.
The second column indexes the tab orientation. There were a total of 10 possible tab orientations. As described in the manuscript, the angles are defined relative to a 0-degree plane, which begins at the ridge between the contexts and extends out toward the observer. The 10 possible orientations were: [-157.5, -135, -90, -45, -22.5, 157.5, 135, 90, 45, 22.5].
The tab orientation indexes are described in the following section.
Each line shows the condition, the tab orientations, and the
corresponding index values. Note that the index order is not the natural order that you might expect.
45 degree context angles, binocular conditions, angles used: [-157.5,
-135, -90, -45, -22.5, 157.5, 135,
90, 45, 22.5], index 1 to 10
90 degree context angles, binocular conditions, angles used: [-135,
-90, -45, -22.5, 135,
90, 45, 22.5], index 1 to 8
180 degree context angles, binocular conditions, angles used: [-90,
-45, -22.5, 90, 45, 22.5], index 1 to 6
45 degree context angles, monocular conditions, angles used: [-157.5,
-22.5, 157.5, 22.5], index 1 to 4
180 degree context angles, monocular conditions, angles used: [-90,
-22.5, 90, 22.5], index 1 to 4
The third column contains the observer's responses from the grayscale Munsell chart. The Munsell values range from 0.5 to 9.5. As noted in the manuscript, there are three out-of-range values: -1 = "Darker than 0.5"; -2 = "Lighter than 9.5, but still a surface"; -3 = "Glowing".
Munsell values for our experiment may be converted to reflectances via this table. First column is Munsell value, second is reflecance, third is log10 reflectance.
Plots
Tabulated Data, Binocular Condition
Tabulated Data, Left Eye Monocular Condition
Tabulated Data, Right Eye Monocular Condition
Supplemental Angle Matching Experiment, Observer 9 Data
The files below provide individual observer data, as well as the
plots, for each condition.
The files are tab-delimited tables, each N rows x 3 columns, where N depends on the condition: 45
degree context angle, N = 36;
90 degree context angle, N =
30; 180 degree context angle, N
= 24.
The first column indexes whether the observer was supposed to match
the angle of the upper context plane (1), lower context plane (2), or tab (3).
The second column indexes the tab orientation. There were a total of 10 possible tab orientations. As described in the manuscript, the angles are defined relative to a 0-degree plane, which begins at the ridge between the contexts and extends out toward the observer. For one subject, tab orientations were not recorded on trials where the observer matched one of the two context planes.For this observer, such tab orientations are indicated by NaN The tab orientation index convention is different for each context angle and is as follows:
The third column contains the observer's
raw unadjusted responses. These numbers are the rotation in
degrees of the line observers rotated to match the orientation of the
context or tab.
The plots show the observers' matches (adjusted as described in the manuscript) against the veridical values. The black diagonal line is the unity line--points that fall on this line are veridical matches. The blue diagonal line is the best fit line through the origin. The graphs are in .pdf format.
Plots
Raw data