Table 1. Mean statistics by image class, with standard error in parentheses. ∗ indicates significant differences (p < 0.05) in these statistics compared with the control group, calculated according to a two-sample t-test.
| Image set | Amplitude spectrum slope | Anisotropy index | Pixel intensity mean | Pixel intensity variance | Pixel intensity skewness | Pixel intensity kurtosis |
| Artists with Schizophrenia |
−1.421∗ (0.045) |
0.307 (0.006) |
150.8∗ (7.3) |
2386.3 (199.2) |
−0.063 (0.163) |
−0.410 (0.278) |
| Sorenson paintings |
−1.425∗ (0.017) |
0.293 (0.001) |
109.3∗ (6.3) |
2824.7 (220.4) |
0.466 (0.137) |
−0.071∗ (0.194) |
| Control group | −1.229 (0.014) |
0.302 (0.002) |
119.6 (3.5) |
2464.5 (150.5) |
0.046 (0.096) |
1.054 (0.25) |