加压素对记忆巩固过程作用的研究 Ⅲ.GABA能药物对加压素易化大白鼠被动回避反应的影响

本文以平台被动回避反应为行为模式,采用侧脑室微量注射AVP和GABA能受体激动剂蝇蕈醇(Muscimol)、受体拮抗剂印防己毒素(Picrotoxin),进一步研究了AVP易化记忆巩固效应及与中枢GABA能系统的关系。主要实验结果如下: 1.AVP对被动回避行为模式的学习训练过程无促进作用,但促进了这种行为的记忆巩固过程,注射AVP的动物记忆保持能力显著高于对照组动物,有效剂量为30ng/大鼠。 2.侧脑室注射100ng/大鼠蝇蕈醇后,AVP仍非常显著地保持其行为效应,但注射100ng/大鼠印防己毒素后,AVP的效应已见下降,剂量增至300ng/大鼠后,AVP的效应已被完全消除。 实验结果再次提示,加压素具有促进记忆巩固过程的中枢性效应,脑内GABA能神经元的活动可能参与了这种效应。     

视场大小对色光和白光的临界融合频率的影响

本实验采用闪烁光度法。刺激光为红光(670nm)、绿光(560nm)、蓝光(450nm)和白光。亮度级为200尼特、20尼特和2尼特。视场约为2°、1°、0.5°和0.25°。受试者3人,均属色觉正常者,具有一定实验经验。结果表明:在同一亮度级上,大小相同的视场内,绿光的CFF都明显地高于明度相同的红光和蓝光的CFF;在同一亮度级上,色光和白光的CFF都随着视场面积的增加而增加。并且CFF-Log面积接近线性关系;在不同亮度级上,CFF-Log面积的直线料率并不相同。2尼特时的直线斜率小于20尼特、200尼特时的直线斜率。     

独生与非独生儿童认知发展的比较研究(广州市)

为了研究中国独生子女政策可能造成的独生和非独生儿童的认知能力的差别,分别在广州七所小学一年级和五年级中选择了146名和171名独生与非独生儿童。用11项认知能力测验对这些儿童进行测查。一年级独生儿童在言语记忆和一般常识项目上的成绩优于非独生儿童。研究认为,一年级独生儿童在与一般认知能力有关的项目上具有优势。而五年级的独生儿童在认知作业成绩上,没有表现出显著性的优势。另外,独生男童在一般常识方面优于独生女童。作者用独生儿童受到较大的父母关注和投资来解释一年级独生对非独生儿童在认知方面的优势。随着儿童的自然成熟和学业教育,两者之间的差距会逐渐缩小,从而使五年级独生儿童未能在认知方面表现出明显的优势。     

Matter in its ‘infinity’

Consistent application of dialectical materialism leads Marxism-Leninism to the assertion that matter is infinite in its properties. However, the history of physics shows that the various levels of matter possess geometric dimensions that originate at the lowest level and continue through the others. The search for absolute natural constants — which Planck called the most pleasant task of physics — shows the conviction of the physicists that there is a limit to the parameters, a limit beyond which matter is no longer divisible. Translated by T. J. BLAKELEY     

Entertaining Each Other?

Television (TV) is reemerging as a focal point for common experiences and community formation through the use of various digital technologies while viewing. A prominent example of this is second screening, or the use of various technologies to share reactions to and attitudes and opinions about what we see and hear while watching TV with other (virtual) viewers. We contend that second screening requires communication scholars to rethink the nature of the TV entertainment experience, as the practice increasingly blurs lines between interpersonal and mass communication processes. In this article, we introduce a conceptual model designed to identify key issues to be considered and addressed by those seeking to better understand entertainment experiences during socially shared TV viewing.     

小学低年级学生自我监控与监控他人的发展研究

元认知监控包括自我监控和监控他人。本研究用两个实验分别探讨了小学低年级学生自我监控和监控他人之间的关系及其发展趋势。实验一采用100以内加减法的计算任务,来探讨小学低年级学生的自我监测和监测他人。实验二采用难度不同、分值不同的计算任务,来探讨学生的自我控制和控制他人。研究发现:第一,小学低年级学生的自我监测和监测他人都会以前期任务表现为依据,支持MPT假说。而且,自我监测和监测他人都在二年级表现出了明显的转化和提高。第二,小学低年级学生在监测他人时,逐渐由以自我信息为依据调整到以他人认知状态为依据。第三,元认知控制能力的发展落后于监测能力。二年级和三年级学生仍旧不能很合理地进行自我执行和计划他人。     

It's not you,it's them: Social influences on trust propensity and trust dynamics

Scholars agree that trust primarily has two bases: trustworthiness—the extent to which a trustee is competent, honest, and has goodwill toward the trustor—and trust propensity—a stable trait reflecting the trustor's generalized belief that others can be trusted. Due to this trait characterization, the literature has largely reached a consensus that trust propensity is only an important base of trust in the earliest stage of a relationship—before information on trustworthiness has been gathered. Additionally, the trait conceptualization of trust propensity inhibits it from being modeled as an explanatory mechanism. Drawing on accessibility theory, a theory of trait activation, we argue that trust propensity has state‐like characteristics that are “activated” by the daily treatment an employee receives from coworkers. Our model highlights that the social context—predominantly ignored in prior trust research because of its lack of relevance to dyadic perceptions of trustworthiness—can have a substantial impact on dyadic trust. Across two multisource experience sampling methodology studies, we provide evidence that state trust propensity transmits the effects of citizenship and deviance received to trust in a focal coworker, whether that focal coworker is a source of that treatment or not. We also address how general levels of workplace unfairness—a between‐person construct—influence these dynamics. We discuss the theoretical and practical implications of these within‐person dynamics for fostering trust within organizations.     

242例吸毒女性自尊及背景资料的调查与分析

运用自尊量表和背景资料调查问卷对甘肃省两大戒毒所242例吸毒女性进行测查,结果表明：（1）年龄、婚姻状况、文化程度、经济收入水平等因素与吸毒女性自尊评分无显著相关;（2）回归分析显示,人际关系因子对吸毒女性自尊评分有显著影响,认知、行为因子对其自尊评分的影响没有达到显著性水平;（3）文化程度不高,无固定的经济收入,失恋或离婚等因素是吸毒或吸毒成瘾的重要关联因素。