Part 1. Symmetry cognition 1. Rotational and reflectional transformations 2. Goodness and simplicity of dot patterns in a regular hexagonal grid 3. Cognitive judgments and group theoretical model for dot patterns in a square grid 4. A three-stage model with group theory and a spatial filter for cognitive judgments 5. Cognitive judgments for repetitive patterns 6. Cognitive judgments for one-dimensional black-and-white filled patterns
Part 2. Contour perception and brightness illusion 7. Mathematical models of an antagonistic process of excitation and inhibition 8. The brightness illusions and a five-level qualitative model based on the decrease in brightness levels 9. A five-level qualitative model for various aspects of brightness contrast 10. A three-level qualitative model for the Ehrenstein illusions
Part 3. Size of the circle in a geometrical illusion 11. The Ebbinghaus illusion as a circle size contrast 12. The Delboeuf illusion by comparative judgment 13. Concentric circle illusion and judgment-order effect by absolute judgments
Part 4. Negative time-order effect on weight sensation 14. Excitation and inhibition in negative time-order effect