Abstract
Individual difference in catecholamine excretion was studied. The amine excre-tion, some mental abilities, physique and physical capacities were investigated on 119 senior high school students. By factor analysis, five factors were extracted from these data. The three factors have considerable loadings in catecholamine excretion and mental or physical characteristics, and suggest that catecholamine excretion, especilly adrenaline, has some relation not only to mental abilities but also to physical characteristics.
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