Supplementary Figure 1. Stereoscopic versions of stimuli. Each row is composed of a pair of
stereo images: R (the right-eye image) and L (the left-eye image). These two images are arranged
as triplets LRL with R in the middle and L on both sides of R. Two ways of fusing the stereo
pairs to obtain the true 3-D configurations are shown by the two-headed arrow symbols: either (i)
Depth, illusions, schizophrenia
2
“cross-fuse” the middle R and rightmost image L or (ii) “uncross-fuse” the leftmost L and
middle image R (by diverging the eyes). Under these viewing conditions, the two top rows will
yield a concave mask, and the third row will yield a convex mask. Finally, the bottom two rows
will yield a 3-D scene with a locally concave region in the middle of the object, around the small
green fixation mark.
Depth, illusions, schizophrenia
3
TOP VIEW
SIDE VIEW
FRONT VIEW
Supplementary Figure 2. Orthographic projections of scenes. Top, front and side orthographic
projections of the concave scenes (“reverse perspectives”). The dotted lines correspond different
views of the stimulus and are for illustration only.
Depth, illusions, schizophrenia
4
Demographic and clinical characteristics of patients
Variable
Age (years)
Chlorpromazine equiv.
(mg/day)
Days since last acute
PH admission (Log10)
Education, father
(years)
Education, mother
(years)
Education, self (years)
Ethnicity (%
Caucasian)
FSIQ (Shipley)
Gender (% male)
Handedness (% right)
Neuroleptics:
typical/atypical/both
PANSS,positive
PANSS, negative
PANSS, general
PANSS, total
Supplementary Table S1
Outpatient
(N=10)
Mean SD
Extended
(N=10)
Mean SD
Acute
(N=10)
Mean SD
51.1
8.1
46.0
15.0
42.7
16.2
F(3,51)=.8, p=.481
400
210
437
213
495
213
F(2,27)=.5, p=.607
3.1
0.2
2.4
0.4
1.3
0.4
F(2,27)=63.3, p=10-10
13.1
3.5
13.2
2.9
10.7
6.3
F(3,48)=.9, p=.450
12.2
3.1
11.9
3.0
10.1
6.0
F(3,49)=.6, p=.622
12.8
2.0
13.6
1.6
13.2
2.4
F(3,51)=.3, p=.845
80.0
NA
80.0
NA
20.0
NA
Χ2 = 20.1, p = 0.065
88.6
60.0
70.0
12.5
NA
NA
90.0
70.0
90.0
10.9
NA
NA
86.7
80.0
80.0
16.2
NA
NA
F(3,48)=.1, p=.935
Χ2 = 3.6, p = 0.31
Χ2 = 3.2, p = .363
1/8/1
11.8
14.2
24.7
50.7
NA
3.5
3.7
5.6
9.7
1/9/0
14.9
16.0
28.5
59.4
NA
5.0
5.1
7.1
15.5
2/8/0
17.3
21.6
36.3
75.2
Group Comparison
NA
4.1
4.6
7.3
14.1
F(2,27)=4.3, p=.025
F(2,27)=7.4, p=.003
F(2,27)=7.7, p=.002
F(2,27)=8.7, p=.001