災害における人的要因の産業精神医学的研究 (第3編)

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Industrial psychiatric studies were performed on the 72 accident proneness workers in a shipyard. Accident frequency distribution of men in each kind of job was first prepared from the accident record obtained during the last 5 years. Then the high accident group (HAG) was selected from the workers in aach distribution above the upper limit of corresponding. Poisson distribution, considering bivariate distribution of the two successive periods during 5 years. Control groups were also selected from the zero or low accident frequency (72 workers) and mode frequency (82 workers) in the same distribution. The Results obtained were as follows: 1. Compared with that of all this shipyard, distribution rate of HAG injuries was somewhat minor in severity. 2. By means of intelligence test and Kraepelin-Uchida character test no significant differences were found between both groups. 3. Individual Rorschach test showed that HAG was inferior in conscious control, emotional stability and maturity, hence in personality adjustment. 4. By aiming test HAG was found less skilful, and "personal tempo" in older age was found slower than that of low accident group (LAG). 5. Psychiatric findings were as follows. In HAG were found 23 mild psychopathics, 5 feeble-mindeds and 7 dull normals. Compared with LAG, significant differences in percentage were shown with regard to mild psychopathic but not to feeble-minded and dull. In psychopathic pattern found in HAG, explosive type (K.Schneider) was the most frequent and the asthenic non-self-confidence type came next. 6. Personality characteristics of HAG as a whole compared with those of LAg were found explosive, weak-willed, careless, oppositional and extroversive. 7. Somatic examination showed no significant differences between both groups. One case of neurotic progressive muscular atrophy was discovered in HAG. 8. HAG's habits of drinking and smoking were somewhat characteristic. 9. The practical rating by foremen showed that HAG had the tendency to insubordination. 10. Turnover rate of HAG was higher than that of LAG. The accident record in the next 5 years proved that most HAG workers had high accident rate. 11. Several case reports were made. 12. Methodology, quality of accident proneness and its relationship to unsafe be-haviour were also discussed.

災害における人的要因の産業精神医学的研究 (第3編)

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