Extracted personality-related feature, which has a significant correlation between predicted score and true score by PCA. From top to bottom are extraversion-related PC3 and PC16 in males, agreeableness-related PC5 and PC15 in males, conscientiousness-related PC 20 in males, extraversion-related PC14 in females. For each panel, the upper faces are created by adding five standard deviations of the projected samples to the mean face; the lower faces are created by subtracting the standard deviation of the projected samples to the mean face. From left to right are faces rotated by 90°, 45°, and 0°. The bigger face next is the mean face, on which the heat colours represent the norm value of PCA at each vertex. At the right side of the mean face are two faces the same as the faces at the left side of the mean face, but with a texture generated from the sample mean face.