摘要
利用fMRI脑成像技术探讨图形型归纳推理的神经机制。设计了一种由图形形状和条纹方向描述的简单几何图形组成的归纳推理任务,这种图形型任务与以往研究中常用的语句型归纳推理任务是同质的。根据两个图形共享特征数量的不同设计了两种实验任务:共享两个特征(2T)和共享一个特征(1T),以休息基线(Rest)作为控制任务。2T和1T任务均为归纳推理任务,但2T任务包含知觉特征整合成分,而1T任务不包括。结果发现:与控制任务相比,归纳推理任务在前额区(BA6、9、11、46、47)、尾状核、壳核和丘脑等脑区有显著激活,反映了"前额皮层-纹状体-丘脑"通路在图形型归纳推理中的重要作用;图形型归纳推理中的知觉信息整合与右侧额下回(BA47)、双侧尾状核头部、壳核等脑区有关。
The neural mechanism of human inductive reasoning is still unclear. Compared with the sentential, numerical task, the figural inductive reasoning task has its advantage. Therefore, a figural inductive reasoning task was designed in an fMRI experiment to examine the neural substrates of human inductive reasoning. The present study is exploratory one and we have no prior hypothesis. The figural inductive reasoning task used was composed of simple geometric figures described by shape and stripe orientation, and was homogeneous to the sentential inductive reasoning tasks used in the previous studies. Two experimental tasks were designed according to the magnitude of shared attributes： sharing two common attributes （2T） and sharing one common attribute （1T）, and rest acted as the control task. Fourteen college students participated in this study. The fMRI results showed： 1） Inductive reasoning as contrast to baseline activated a large number of brain regions including the prefrontal cortex （BA 6, 9, 11, 46, 47）, caudate, putamen, and thalamus, which might reflect the important role of the fronto-striato-thalamus loop in human figural inductive reasoning. 2） Perceptual information integration in figural inductive reasoning was related to the right inferior frontal gyrus （BA 47）, the bilateral head of caudate, putamen. This study explored the neural substrates of human inductive reasoning by using a figural task, which would be helpful to in-depth understand the information-processing mechanism of human inductive reasoning.
出处
《心理学报》
CSSCI
CSCD
北大核心
2010年第4期496-506,共11页
Acta Psychologica Sinica
基金
国家自然科学基金项目(60775039)
关键词
归纳推理
功能磁共振
知觉信息整合
inductive reasoning
functional magnetic resonance imaging （fMRI）
perceptual information integration
