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The Verification of Causality among Accident, Depression, and Cognitive Failure of the Train Drivers

철도기관사의 사고, 우울감, 인지실패 간의 인과관계 검증

  • Received : 2016.12.02
  • Accepted : 2016.12.21
  • Published : 2016.12.31

Abstract

This study intended to testify the causality among three variables such as accident, depression and cognitive failure of the train drivers. For this purpose, two research models were suggested. Model 1 hypothesized the causality among three variables as 'depression ${\rightarrow}$ cognitive failure ${\rightarrow}$ accident'. On the other hand, model 2 hypothesized the causality among three variables as 'accident ${\rightarrow}$ depression ${\rightarrow}$ cognitive failure'. Results based on AMOS using 416 train drivers' questionnaire showed that model 2 is more valid than model 1. The statistical result of model 1 showed that depression has a positive effect on cognitive failure, however no significant relationship between depression and accident as well as between cognitive failure and accident. In model 2, the result showed that the accident has a positive effect on cognitive failure mediated by depression. This result suggests the necessity for establishment of countermeasures to mitigate mistake and cognitive failure caused by train drivers in a wider context, considering the causality between accident and depression.

본 연구는 철도기관사에 의해 유발되는 사고와 우울감 및 인지실패 간의 관계를 '우울감 ${\rightarrow}$ 인지실패 ${\rightarrow}$ 사고'의 인과관계로 접근하는 연구모형 1과 '사고 ${\rightarrow}$ 우울감 ${\rightarrow}$ 인지실패'의 인과관계로 접근하는 연구모형 2로 설정하고 어느 모형이 타당한지를 구조방정식 모형으로 검증하였다. 현직 철도기관사 416명의 설문응답 유효데이터를 토대로 검증한 결과 후자의 연구모형, 즉 '사고 ${\rightarrow}$ 우울감 ${\rightarrow}$ 인지실패'의 인과관계에서 사고가 우울감을 매개로 하여 사고에 영향을 미친다는 점에서 모형 2가 통계적으로 타당하다는 결론을 도출하였다. 이 같은 연구결과는 인적오류와 관련하여 사고와 우울감의 인과관계 측면에서 접근하고 제도적인 개선방안을 함께 모색할 때 궁극적으로 기관사의 실수와 인지실패를 저감시킴으로써 인지실패로 인한 사고와 인적 오류의 확률을 그만큼 저감할 수 있다는 것을 시사한다.

Keywords

References

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