Using Neuroimaging to Measure Mental Representations: Finding Color-OpponentNeurons in Visual Cortex

To date, most neuroimaging studies have tried to localize large regions in the brain that are responsible for specific behaviors or mental operations. Psychological theory, however, is more concerned with the nature of mental functions than with the locations of their neural substrates. This article reviews work that moves beyond functional anatomy to measure how color is represented by neurons in visual cortex. The general approach has three basic steps: First, the areas under investigation are localized in the brain. Second, responses of these areas are measured to sets of systematically varying stimuli, designed to uncover the nature of cortical representations. Third, the neuroimaging data are compared with behavioral data measured with the same stimuli. Results obtained using this approach support the hypothesis that primary visual cortex contains color-opponent neurons that support perception.     

系统视角下致癌基因与遗传背景的相互作用

肿瘤是当今人类生命健康的主要威胁之一。致癌基因与遗传背景和肿瘤的形成有密切关系。致癌基因与遗传背景,致癌基因与抗癌基因之间的时空结构和非线性作用都有可能使正常细胞恶变,导致肿瘤的形成。致癌基因与遗传背景实际上构成了细胞中的一个完整的遗传系统。本文试图用系统方法探讨两者的相互作用,以便更好地探讨肿瘤发生的机理和治疗手段。     

中国人面部自然肤色色域范围及典型肤色色样的研制

分别采用一自Ａｕ－ＣＨ－１型自动测色仪及一台３０２Ｄ型自动测色仪对中国人的面部自然肤色,从新生婴儿直至老年人的色度特性进行了广泛取样的测定。测定人数共１６６８人,其中新生婴儿至２岁幼儿５０８人：３－１７岁的儿童及青少年５４８人;１８－７８岁的成年人及老年人６１２人。被测者的籍贯包括２６个省市,除汉族外,还包括蒙、臧、维,壮等１７个少数民族。少数民族的被测人数约占总被测人数的６％。首次确定了我国人的面部自然肤色的色域范围及皮肤反射率的分布范围。在此基础上研制成功具有我国人典型自然肤色色样一套。所得结果已被应用于电视、电影、摄影及照明等部门。     

Autoshaped responding: A baseline for studying stimulus preference

In an autoshaping procedure with pigeons, trials consisted of the illumination of two keys, each with a different color, and then a response-independent feeder operation. Over successive conditions, all key-color pairs were arranged from the set of amber, red, green, and blue lamps. During sessions with a given pair, the left-right configuration of the colors varied irregularly, and the two colors alternated in illuminating the feeder. With one red and one green key, for example, red appeared sometimes on the left and sometimes on the right, and the feeder was alternately lit red or green on successive trials. Both total pecks and proportion of trials with at least one peck on a key of a given color were generally greater for red and amber than for green and blue, and relations among preferences were generally transitive across different color pairs. Repeating the procedure with decreased red and amber intensities and increased green and blue intensities reduced red and amber pecking relative to green and blue pecking, implying that differences in responding were determined more strongly by intensive than by chromatic properties of the stimuli.     

Effects of barbiturates and other sedative hypnotics in pigeons trained to discriminate phencyclidine from saline.

Pigeons were trained to peck the center key (lighted white) of three response keys to turn off the center keylight and to light one of the side keys with a red keylight and the other side key with a green keylight. Five responses (fixed-ratio component) on either side key relighted the center key. Food was delivered following 10 fixed-ratio components on the red key if 1.5 mg/kg phencyclidine had been given before the session. The position of the red and green keylights on the side keys varied randomly each time they were lighted by a peck on the center key. Subsequently, increasing doses of phencyclidine, barbital, amobarbital, phenobarbital, methaqualone, methyprylon, diazepam, oxazepam, and d-amphetamine were substituted for the training dose of phencyclidine, using a cumulative dosing procedure. At low doses of the sedative hypnotics, birds pecked the keylight color associated with saline. At higher doses, birds pecked both key colors. At the highest doses of pentobarbital and amobarbital, some birds responded almost exclusively On he color associated with phencyclidine. When responding on keys of both colors occurred following administration of phencyclidine or other sedative hypnotics, this responding was controlled by key position rather than by key color.     

沃尔夫假说的新证据:范畴内和范畴间颜色辨别难度相同时语言范畴也会影响注意前颜色知觉

该研究探讨了当范畴内和范畴间颜色的辨别难度相同时,语言范畴是否会影响注意前颜色知觉。实验中,采用渐变且相邻者差别阈限数相当的A、B、C、D四种颜色（前两者为绿色,后两者为蓝色）为刺激材料,并让被试接受视觉Oddball脑电测试。脑电测试分视野给被试呈现标准刺激,以及与标准刺激属同一语言范畴（即颜色词绿色或蓝色）或不同语言范畴的偏差刺激。结果发现：在左视野呈现时,范畴内偏差刺激比范畴间偏差刺激诱发了边缘显著更大的视觉失匹配负波（vMMN）,在右视野呈现时,两类偏差刺激诱发的vMMN无显著差异;范畴内偏差刺激在不同视野呈现时诱发的vMMN无显著差异,范畴间偏差刺激则在右视野呈现时诱发了显著更大的vMMN。这一结果表明,当范畴内和范畴间颜色的辨别难度相同时,语言范畴也会影响早期的、注意前颜色知觉,支持了沃尔夫假说。     

恐惧管理理论的争议及其对死亡心理研究的启示

死亡心理是人类面临死亡及相关事件时所产生的认知、情感和行为意向的复杂心理状态。目前, 研究死亡心理较为全面和科学的理论是恐惧管理理论(Terror Management Theory, 简称TMT)。但该理论存在以下争议: (1)在死亡的基本认知方面, 恐惧管理理论呈现出不一致的研究结果, 如死亡是否与不确定性无关, 死亡是否导致恐惧情绪, 寻求个体生存是否为人类的核心议题; (2)在社会文化层面, 恐惧管理理论提出者的文化背景对待死亡的普遍态度是呈否认的, 但是跨文化的研究显示其他文化背景对待死亡的态度却呈现出接纳或蔑视; (3)在恐惧管理理论的研究结果方面, 呈现出较多的矛盾性, 表明研究中有重要的调节因子未被涉及。基于此, 死亡心理可能的研究方向拟从认知、行为和社会三个层面进行梳理。未来死亡心理研究需秉承科学与文化并重的原则, 并结合死亡心理的内容与过程, 关注群体面对死亡时的心理规律, 开展死亡心理影响下的身心健康干预研究。     

当代东方儒学兴起的背景——东方文化与东方哲学

儒学本是东方的一种古老的学术文化 ,其成为当代的话题并引起世人的关注 ,乃是 2 0世纪 80年代以后的事。 70年代东亚经济起飞 ,特别是 80年代以来东亚现代化的推进 ,显示出一种有别于欧洲的“集团主义人文类型”的现代化模式 ,不仅令西方经济界瞠目 ,而且使得许多西方人士意识到 :亚洲今天发生的种种革命性变革背后 ,有一个传承数千年的历史背景。今天 ,我们欲在世界历史进程中追寻儒学变化的踪迹 ,必须具备东西方文化对比的大视野。应该说 ,东方文化与东方哲学 ,即是我们了解东方儒学的大背景。     

A risk of confidentiality

The concept of confidentiality is examined from its absolute position espoused by some psychoanalysts to the many exceptions to this position allowed by others. The suggestion made in this paper is offered as a psychoanalytic one which urges us to see confidentiality as posing risks in both positions, that is, the absolute and the necessary exceptions. Confidentiality is representative of many, if not all, of the rules and methods that are implicit in the conduct of an analysis and thus may well be taken for granted. The suggestion offered is for a periodic re-examination of the implicit background of psychoanalysis.     

Gender-Role Identity,Attitudes Toward Marriage,and Gender-Segregated School Backgrounds

The purpose of this study was twofold: (1) to investigate the relationship between gender-role identity and attitudes toward marriage by comparing Bem's gender schema theory and Spence's multifactorial model of gender identity; (2) to examine the effects of gender-segregated school backgrounds on gender-role identity and attitudes toward marriage. A total of 524 male and 696 female Japanese college students completed the Japanese version of the Bem Sex Role Inventory and a series of questions regarding attitudes toward marriage. Overall results were more supportive of Spence's multifactorial model. The effect of school background was found only in women; women without any coeducational school background had relatively strong masculinity and desired to marry at an older age, but tended to have a conservative opinion about men taking nontraditional roles.