Reaction Time Human

the time from the beginning of the delivery of the signal until the organism’s responding reaction. Human reaction time is divided into three phases: the time for the nerve impulses to pass from the receptor to the cerebral cortex; the time needed to process the nerve impulses and organize a responding reaction in the central nervous system; and the time of the organism’s responding action. Human reaction time depends on the modality of the stimulus, that is, on the type of signal-stimulus; the intensity of the stimulus; the degree of conditioning; the attune me nt to perception of the signal; age and sex; and the complexity of the reaction (simple or selective). Human reaction time to discrete independent stimuli changes within a broad range. For a simple reaction the average human reaction time in the most favorable cases is no less than 0.15 seconds (recognition of visual images is no less than 0.4 seconds). Human reaction time is one of the most important factors in occupational selection. It is crucially significant in determining the psychophysiological capacities of persons to work as operators, pilots, cosmonauts, drivers, and so on.