Abstract: Abstract:The obsessive-compulsive disorder(OCD) is a common chronic mental disease, obsessive thoughts and compulsive behavior as the main characteristics, it has a lifetime prevalence of 2%-3%. In recent years, the research have do a lot of research for the pathogenesis of obsessive-compulsive disorder and so all, most of the research focuses on the cognitive defects of OCD patients, such as memory、decision making 、perception and so all. But the direct studies of the information processing way about the OCD direct is very few ,most studies are indirectly reflect the tendency of obsessive-compulsive disorder information processing, therefore it is necessary to increase the exploration in this area. Our research by used Flanker task, to research the differences in the way of the information processing in the Flanker task about the different obsessive-compulsive (OC) tendency individuals ,in order to fill in this respect. In our research, we through the questionnaire of padua screen out the 13 high OC tendency participants and 11 low OC tendency participants, through their differences in the Flanker task, to study the differences in the information processing way about the obsessive-compulsive tendency participants. In the Flanker task ,we asked the participants quickly and accurately to respond to the presented target letter (S or H) that was flanked by compatible (e.g., SSSSS) or incompatible (e.g., HHSHH) noise letters. In our study , we used the reaction time(RT), error rate and parallel processing index(parallel processing index defined as incompatible trials RT minus compatible trials RT) as the dependent variable. The results showed that, (1) high OC tendency participants had slower overall reaction time (RT) in the Flanker task, in mean that high tendency compared with low tendency to the individual, the individual's reaction time is higher. In other words, high OC tendency of individual shows more hesitant;(2) In the condition of low probability(20%),we haven’t found the significant differences in the parallel processing index between the high OC tendency participants and low OC tendency participants. But, in the condition of high probability (80%),we found that the parallel processing index in high OC participants was significantly lower than low OC tendency participants. In other word, compare with low OC tendency participants, the information processing way of high OC tendency participants was more given priority to with focused processing ,it more single and conservative;(3)While the probability of scene change ,the parallel processing index change of high OC tendency participants was not significant, but the parallel processing index change of low OC tendency participants was significant. It show that high OC tendency participants shortcomings on the flexibility of information processing, less sensitive to the change of scene. Based on the research of the obsessive-compulsive tendency to individuals information processing way, it can help to enrich and develop the theory of obsessive-compulsive disorder, and to provide basis for clinical treatment of obsessive-compulsive disorder.

Key words: obsessive-compulsive tendency , focused processing , Flanker task , parallel processing index, processing flexibility

摘要： 采用Flanker范式，通过考察高低强迫倾向个体在Flanker任务上的差异，来研究强迫倾向个体信息加工方式的特点。研究结果显示，在Flanker任务中，高强迫倾向个体显示出较慢的反应速度，表现为更多的犹豫不觉的特性；高强迫倾向个体的信息加工方式以集中加工为主；高强迫倾向个体在信息加工的灵活性上存在不足，对情景的变化较不敏感。通过对强迫倾向个体的信息加工方式的研究，有助于丰富和发展强迫症的理论，同时为强迫症的临床治疗提供依据。

关键词: 强迫倾向, 集中加工, Flanker任务, 并行加工指数, 加工灵活性