The Psychologial Validity of Markov Assumption

사람들이 예측을 할 때 어떤 정보를 이용할까? 인과 베이즈 모형은 인과 구조의 제약인 마크로프 원리에 의해 인과 예측이 이루어진다고 주장한다. 하지만, 선행 연구들은 사람들이 마르코프 원리가 제안하는 차단 규칙을 일관되게 위반하고 있음을 보고하고 있으며, 이는 인과 베이즈 모형의 심리적 실재성을 위협하는 것이다. 본 연구는 사람들이 어떻게 인과추론을 하는지 3가지 가설, 불충분 인과모형 가설, 모순가설(Walsh & Sloman, 2004), 그리고 기저 메커니즘 가설(Rehder & Burnett, 2005)을 검증하였다. 실험 1은 인과 충분성이 보장된 인과 구조에서도 차단 규칙은 위반됨을 보여주었으며, 이는 모순 가설(Walsh & Sloman, 2004)을 지지하는 결과이다. 실험 2는 실험 1에서 발생 가능한 혼입 변인을 통제하였다. 하지만 그 결과는 실험 1과 동일하였다. 실험 1과 실험 2의 결과가 인과 베이즈 모형에 시사하는 바를 논의하였다.

keywords: Markov assumption, Causal Bayes net, Contradiction, Causal inference, Screening-off rule, 인과 베이즈 모형, 마르코프 가정, 모순 가설, 인과 추론, 차단 규칙

Abstract

What kind of information do people use to make predictions? The principle that causal Bayes nets suggest is that people follow structural constraints like the Markov principle. Previous studies have cast doubt on the psychological validity of the screening-off principle. I tested three hypotheses about how people used causal information to make predictions. Experiment 1 revealed that people violated the screening-off rule even when a causal structure was causally sufficient supporting the contradiction hypothesis (Walsh and Sloman, 2004). Experiment 2 controlled possible compounding in Experiment 1 but still reported the violation. Possible implications to the causal Bayes net formalism were discussed.

keywords: Markov assumption, Causal Bayes net, Contradiction, Causal inference, Screening-off rule, 인과 베이즈 모형, 마르코프 가정, 모순 가설, 인과 추론, 차단 규칙

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논문 상세

Vol.25 No.1

인과 마르코프 가정의 심리적 실재성에 대한 연구

The Psychologial Validity of Markov Assumption

초록

Abstract

참고문헌

한국심리학회지: 인지 및 생물