本文通过对131例精神发育迟滞患者犯罪案例资料分析,揭示了影响其作案时辨认能力的有关因素,并通过判别分析选取了作案类型、平素性格、精神发育迟滞诊断分级、作案时是否伴有精神病、是否受骗及作案动机六个因素为判别因子,建立了评定作案时辨认能力的判别方程。组内回代检查总正确率为83.2％。 Through the analysis of the criminal cases data of 131 patients with mental retardation, this paper reveals the factors that affect their ability to identify when committing a crime and chooses the type of crime, the general character, the mental retardation diagnosis and grading by discriminant analysis and the psychosis , Whether or not cheated and motives for committing a crime are the distinguishing factors, and the discriminant equations for assessing the ability to identify a crime at the time of committing the crime are established. The total correct rate of back-examination in the group was 83.2%.