Development of self-recognition in chimpanzees (Pan troglodytes).

Chimpanzees (Pan troglodytes) demonstrate the ability to recognize themselves in mirrors, yet investigations of the development of self-recognition in chimpanzees are sparse. Twelve young chimpanzees, grouped by age, were given mirror exposure and tested for self-recognition and contingent movement. All 6 juveniles, 4 and 5 years old, exhibited mirror-guided, mark-directed behavior and clear evidence of self-recognition. In contrast, among the infants, only the oldest group of 2 1/2-year-olds exhibited clear evidence of self-recognition. All chimpanzees exhibited both self-directed behaviors and contingent movements. These results suggest that self-recognition occurs at a slightly older age in chimpanzees than in human infants. In humans, self-recognition is linked with other cognitive abilities. The results conform to the general pattern that great apes exhibit many cognitive skills comparable to those of 2-year-old humans.     

恒河猴数相加能力的初步研究

本实验训练恒河猴对两组其和不超过8的刺激实体(卡片上的黑色圆点)进行相加,再与第三组刺激实体进行数多少的比较判断。实验共有9个训练程序,课题逐次由易到难,刺激的数目也由少到多。有一只恒河猴达到了全部9个程序的训练标准。证明恒河猴的确具有学会把两个数进行相加的能力。这种相加不可能是数数的结果,极可能是在知觉上将它们融合或接合在一起。     

Chinese teenagers' concerns about the future: a cross-national comparison.

Teenagers in the U.S., U.S.S.R., Eastern Europe, Western Europe, and New Zealand have consistently rated death of a parent and nuclear war as their greatest concerns about the future. In the present study, however, Chinese teenagers rated overpopulation and environmental pollution as their greatest concerns; these were usually rated quite low by teenagers in other countries. While still of concern to Chinese teenagers, nuclear war seemed more remote to them than it did to U.S. and U.S.S.R. teenagers and therefore more survivable. Speculation is offered as to how teenagers' concerns reflect those of a country's general population.     

Smooth-pursuit eye tracking in first-episode psychotic patients and their relatives.

We wished to determine the specificity of smooth-pursuit eye tracking dysfunction to schizophrenia and the prevalences of dysfunction among functionally psychotic and normal individuals. Therefore, we investigated pursuit tracking in a large sample of psychotic patients, normal subjects, and first-degree relatives (N = 482). Patients were recruited as part of an epidemiological study of first-episode psychosis that used a broadly based referral network to identify all cases in a major metropolitan area over a 2 1/2-year period. Patients received diagnoses of schizophrenia, schizophreniform disorder, psychotic mood disorder, and paranoid or other psychotic disorder based on the third edition of the Diagnostic and Statistical Manual of Mental Disorders (American Psychiatric Association, 1980). The distribution of tracking performance was bimodal for the schizophrenic patients and their relatives, perhaps reflecting major gene action. Moreover, poor tracking ran in families. Pursuit tracking dysfunction was relatively specific to schizophrenic patients and their relatives and occurred infrequently in other psychotic patients and normal subjects.     

Four bootstrap confidence intervals for the binomial-error model

Confidence intervals for the mean function of the true proportion score ( _x ), where andx respectively denote the true proportion and observed test scores, can be approximated by the Efron, Bayesian, and parametric empirical Bayes (PEB) bootstrap procedures. The similarity of results yielded by all the bootstrap methods suggests the following: the unidentifiability problem of the prior distributiong() can be bypassed with respect to the construction of confidence intervals for the mean function, and a beta distribution forg() is a reasonable assumption for the test scores in compliance with a negative hypergeometric distribution. The PEB bootstrap, which reflects the construction of Morris intervals, is introduced for computing predictive confidence bands for x. It is noted that the effect of test reliability on the precision of interval estimates varies with the two types of confidence statements concerned.The Authors are indebted to the Editor and anonymous reviewers for constructive suggestions and comments. The authors wish to thank Min-Te Chao and Cheng-Der Fuh for some useful suggestions at earlier stages of writing this paper.     

胼胝体分步全切病人左右侧命名的不对称

以一位第一次进行胼胝体前部切开,第二次作后部切开的胼胝体全切断患者为被试,在第二次手术前后进行了Ⅰ。左右单侧操作检查,和Ⅱ。两半球之间感觉信息传递两类神经心理学实验。结果提示:后部切断前,左右侧操作没有明显的差异。同时,视觉和触觉的感觉信息的传递基本正常。在后部切断后,命名作业呈右视野和右手优势,图形临摹左手似乎较好,这时视觉和触党的感觉信息的传递发生了障碍。左视野和左手命名高于随机水平,讨论了这一结果与右脑语言的关系。方位比较等多个实验提供了支持两半球协同活动理论的证据。     

选择注意模型的视觉实验研究

本研究以改变了的stroop effect(即不但要求被试分别用两种语言报告字词的颜色,同时刺激词也是两种语言的)作为研究手段来考察选择注意模型,实验结果表明字词的涵义对颜色命名任务产生影响作用,并且在报告用语和书写用语属同一语种的情况下比在属不同语种的情况下,字词的涵义对颜色命名任务有更大的影响作用。对此,作者把语言看作是一种加工通道,根据实验结果,得出结论认为:通道内部的选择注意是反应性的,跨越通道的选择注意是知觉性的,选择注意模型因条件而异。     

五岁至七岁独生和非独生子女某些个性特征的比较及性别差异的研究

本研究是在北京城区六个日托幼儿园所作的关于5至7岁独生和非独生子女某些个性特征差异的比较研究。被试有138名独生子女和127名非独生子女,其中男孩120名、女孩145名。观察了五类行为:独立性、助人行为、依赖性、攻击行为和友好行为,这五类行为共有16个观察项目。在所有三个年龄组,非独生子女在依赖性,助人行为和攻击行为等方面的平均得分总的来说略高于独生子女,但是没有统计学上显著差异。只有五岁组在独立性方面独生和非独生子女之间的差异达到显著性水平(P<0.005)。对被试家长问卷的分析也表明,独生子女与非独生子女之间在大多数项目和年龄组都没有显著差别。只有独立性这一方面在五岁组差异是显著的。我们还比较了性别差异,在所观察的五类行为中除了助人行为之外,在依赖性、独立性、攻击性行为和友好行为等方面都存在显著的性别差异。在友好行为方面女孩比男孩表现好,而男孩比女孩更富有攻击性。     

群体隔离对大白鼠行为的影响及其与脑内单胺类神经介质含量的关系

观察表明,群体隔离(10—12周)的大白鼠,在开阔地方的自由活动和杀小鼠行为方面没受到明显影响,但隔离鼠在电击后格斗行为明显地增加了。隔离鼠脑内单胺类种经介质的含量无明显改变。在电击格斗后群居组和隔离组脑内DA含量均明显降低。群居组鼠端脑内NE含量增高,脑干内5-HIAA含量降低,但隔离组无上述改变。隔离鼠在注利血平、电击后格斗行为明显减少。对上述现象进行了讨论。     

家长对子女人格特点的自由描述──中国儿童样本对“大五”人格结构的验证

运用与荷兰、美国等国的跨文化研究组相同的访谈和编码方法,对我国北京和福州两个城市共４１０位的３至１２岁儿童的家长进行了访谈,目的是从自然语言途径,探讨我国儿童的人格特点,并将结果与国外同样研究进行跨文化比较。结果表明：本样本儿童的人格特点可以运用成人“五因素模型”进行解释。并且,中国家长提供的自由描述完全可以纳入美国和荷兰研究组设计的“１４概念”编码系统。与其他国家的结果相比．中国家长对于“谨慎性”概念的重视程度远高于美国、荷兰和比利时儿童的家长,表现出显著的文化差异。此外,中国家长对于孩子“智力”问题的注意多于西方国家的家长,但对孩子在“宜人性”概念上的描述则最少。