The state of the art and the further possibilities of physiological and psychophysical simulations of color vision are discussed. To achieve physio-logically and psychophysically adequate models of color vision and other perceptual systems 1) the properties of the respective stimuli have to be determined and described by physiological models; 2) the properties of the neuronal coding system have to be measured by electrophysiological methods and described in physiological neuronal network simulations; 3) the sensations (perceptions) have to be described as related to the neuronal coding systems( epistemological, i.e., structural description); in addition, 4) the sensations (perceptions) have to be described as closely related or identical to material (physical) properties (ontological description). Simulations with these models allow us to explain the rrsults of behavioral (animals) and psychophysical (man) experiments from the properties of the stimuli alone (neuroethology) including the internal representation of color stimuli in terms of color sensations.
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