In addition to symmetry, name three other Gestalt principles for perceptual organization 1. Incapability of a single receptor to distinguish between intensity and wavelength. Draw the dark adaptation function of the human eye, and explain why it has two parts. For figure see Rods and Cones have different adaptation capacities and different response times.
Cones respond faster but can adapt only to a small extent.
Rods respond slower but can adapt to a much greater extent. Helmholz outlined a three part view of how the senses should be scientifically studied. Describe the 3 parts of the scientific task of sensory science as outlined by Helmholtz. Subdivide each modality into elementary sensations. Discover the receptors responsible for each sensation.