中学生物理学科问题分类表征层次的研究

以三套分别含有按照解题方法可以分为二类、三类、四类的物理学科问题分类实验材料,对济南市6所中学3个年级766名中学生进行研究,结果表明:不同年级、不同学业水平学生分类表征层次的差异显著,呈现随年级升高而升高的趋势,学优生的水平明显高于学困生,学优生更多地倾向内在分类表征;随着分类任务的类别数量增多,更多学生倾向外在分类表征;不同性别学生的分类表征层次没有显著差异;不同物理学科问题分类表征层次学生的物理成绩之间存在显著差异。     

Male vocal competition is dynamic and strongly affected by social contexts in music frogs

Male–male vocal competition in anuran species is critical for mating success; however, it is also highly time-consuming, energetically demanding and likely to increase predation risks. Thus, we hypothesized that changes in the social context would cause male vocal competition to change in real time in order to minimize the costs and maximize the benefits of competition. To test this hypothesis, we assessed the effect of repeating playbacks of either white noise (WN) or male advertisement calls on male call production in the Emei music frog (Babina daunchina), a species in which males build mud-retuse burrows and call from within these nests. Previous studies have shown that calls produced from inside burrows are highly sexually attractive (HSA) to females while those produced outside nests are of low sexual attractiveness (LSA). Results showed that most subjects called responsively after the end of WN playbacks but before the onset of conspecific call stimuli although call numbers were similar, indicating that while males adjusted competitive patterns according to the biological significance of signals, their competitive motivation did not change. Furthermore, these data indicate that the frogs had evolved the ability of interval timing. Moreover, when the inter-stimulus interval (ISI) between playbacks was varied, the subjects preferentially competed with HSA calls when the ISI was short (<4 s) but responded equally to HSA and LSA calls if the ISI was long (≥4 s), suggesting that males allocate competitive efforts depending on both the perceived sexual attractiveness of rivals and the time available for calling. Notably, approximately two-thirds of male calls occurred in response to HSA calls, a preference rate comparable to that previously found for females in phonotaxis experiments and consistent with the idea that the mechanisms underlying both the male’s competitive responses to rivals and the female’s preferences toward potential mates coevolved under the same selective pressure.     

父亲情绪表达与儿童社会适应:气质的调节作用

通过对341名学前儿童进行问卷调查和任务测查,考察了父亲情绪表达、儿童气质与儿童社会适应的关系。结果表明:(1)父亲积极情绪表达对儿童社会能力有正向预测作用;父亲消极情绪表达对儿童社会能力具有负向预测作用,而对外显、内隐行为问题有正向预测作用。(2)儿童的积极情绪性对其外显行为问题与社会能力均有显著正向预测作用;消极情绪性对其社会能力有负向预测作用,而对其外显行为问题有正向预测作用;儿童的努力控制对其外显行为问题有较强地负向预测作用,对其社会能力具有正向预测作用。(3)父亲情绪表达与儿童努力控制、消极情绪性对儿童社会适应有显著交互作用,父亲情绪表达对不同气质特点儿童的社会适应具有不同的预测作用。     

末期癌症患者的临终关怀

临终关怀与末期癌症关系密切,末期癌症患者是临终关怀的主要对象,这也是姑息医学的主要内容.作为发展中的学科,本文对临终关怀的发展、目的、内容及其在末期癌症患者中的实施作一综述.     

以整合的理念引领医学课程改革

整合课程改革要面对教改动力、教学组织、师资及实施策略等多方面问题,介绍四川大学华西临床医学院以"从树干到树叶"为教改思路、研究实施"以器官系统为基础"整合课程的历程,介绍"院院合一"组织架构、医疗、科研整合支撑教学改革、先期试点并逐步推进、隐蔽课程等经验,为国内外医学院校提供参考借鉴.     

医生、护士对PICC告知态度的调查研究

了解医生护士对PICC告知态度。自设问卷调查北京市两所医院执行PICC操作科室医生护士。医生护士认为操作前应向患者告知并签署同意书,部分原因有统计学差异;临床主要采取“医生告知、护士实施”模式;双方均倾向于降低自身法律风险的告知模式,赞成国家出台护士进行特殊告知的法律文件。建议现阶段采取医护共同告知模式。     

人格测量：从累积式模型到展开式模型

当前大多数人格测量都采用的是累积式反应模型方法,该模型假设被试在测验上的得分随其能力或特质提高而增加,但是随着人格测量技术的不断发展,这一模型的实施效果遭到了质疑,研究者们开始关注展开式模型,该模型认为被试的反应取决于被试能力和项目阈值的匹配程度,当被试能力与项目阈值完全匹配时,被试做出肯定回答的概率达到最高点,称之为“理想点”,展开式模型的目的就是找到被试的理想点,从而寻找其真正的态度强度或人格特质水平。GGUM作为一种比较成熟的展开式模型,已经开始应用于人格测量的各个领域,但仍需要进行大规模的试测,在评估和预测效度方面积累经验,建立业界认可的心理测量学标准,不断探讨和开发相应的心理测量理论和简便易行的统计程序。     

关系类别及其学习机制

关系类别是指类别的成员身份由一个共同的关系结构决定。其意义来自于其与其他实体的关系或其内部的一系列成分间的关系,关系类别强调关系结构的系统性。文章重点介绍和评述了相似性种类,关系类别和实体类别的联系和差异,关系类别的学习过程及机制———结构—映射理论。未来的研究方向主要是探索新的研究范式,以深入理解关系类别的学习;深入探讨校准和映射过程与其他基本认知过程的相互作用,为关系类别的学习提供更一致的认知观点。