为正确适用法律,刑事案件的作案人、受害人和证人常被警方送去做司法精神疾病鉴定。这类鉴定有赖于医警密切配合,协同作战。警方为鉴定所作的准备工作必不可少,直接影响鉴定的质量和效率。由于刑警普遍未接受过相关的技能培训,对如何开展调查往往不得要领,事倍功半。自司法精神病鉴定引入司法实务中以来,一般刑警在着手调查时,都知道要了解待鉴定人过去有无精神病史,高热抽搐史、脑外伤史及家族遗传史。其实,仅提取这些资料还远远不够。一般而言,被鉴定人是由正常人和精神病人两部分人构成。前者是指一类特殊的正常人群,包括装病者,被误为有病者,人格变态者、吸毒者和普通醉酒者。司法精神病鉴定的目的之一是将这两大类区分开来。医生怎样区别他们?不 In order to properly apply the law, the perpetrators, victims and witnesses of criminal cases are often sent by the police for judicial and mental illness appraisal. Such identification depends on the close cooperation of medical police, collaborative operations. The police preparatory work for the identification is essential and directly affects the quality and efficiency of the identification. As the Interpol generally have not received the relevant skills training, how to carry out the investigation often can not get the essentials, less effective. Since the introduction of judicial identification of psychiatric judiciary practice, the general Interpol in the investigation, we all know to be identified in the past to be identified without mental illness history, history of hot twitch, traumatic brain injury history and family history. In fact, extracting only these data is far from enough. Generally speaking, the appraised person is composed of two parts of normal people and mental patients. The former refers to a special group of normal people, including those who pretend to be sick, those who are mistaken as sick, abnormal persons, drug addicts and ordinary drunkards. One of the purposes of forensic psychiatry is to distinguish between these two broad categories. How do doctors distinguish them?