Abstract
This chapter discusses the causal relationship between physiological and psychological processes. There are physiological and psychological aspects of the human brain; they have theoretical similarities. The psychological concept is similar to informational synthesis in signal detection theory. This theory describes the sensory perceptive process as a result of the interaction of the two independent variables: sensory factor and decision criterion, connected with motivation and personality attitudes. The signal detection theory considers perception not as a simple result of the stimulus action of the receptors and of excitation conduction to the higher brain centers but as compound function determined by the interaction of the sensory and nonsensory mechanisms. Physiological and psychological approaches considers stimulus information processing as a result of interaction of two independent factors, one connected with sensory and the other connected with motivational mechanisms. Physiological and psychological approaches both consider stimulus information processing as a result of interaction of two independent factors, one connected with sensory and the other connected with motivational mechanisms.
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