基于属性掌握概率的认知诊断计算机化自适应测验选题策略

在认知诊断计算机化自适应测验(CD-CAT)中, 被试对每个属性的掌握概率更直接地反映了被试能力的当前估计值。因此, 基于被试的属性掌握概率来构建选题策略, 选择最能改变被试属性掌握概率的题目作为下一个测验项目, 这应该是一个值得尝试的方案。本文借鉴已有相关研究的数据生成模式进行探索, 模拟实验结果表明：假设属性间相互独立,在定长(长度为16)、变长(长度为16或后验属性掌握模式概率达到0.8)以及短测验(长度分别为4、6、8、10)的情况下, 基于属性掌握概率的选题策略PPWKL和PHKL有较好的分类准确率, 在题目曝光率, 题库使用均匀性等方面也有较好的表现; 与研究较多的PWKL、HKL等策略相比, 也略有优势; 当属性间存在不同程度的相关时, 在定长、变长以及较短的测验条件下, 基于PHKL和MI的测验对知识状态估计精度较好, 基于PPWKL和PHKL的测验综合表现占优。     

Time manages interference in visual short-term memory

Emerging evidence suggests that age-related declines in memory may reflect a failure in pattern separation, a process that is believed to reduce the encoding overlap between similar stimulus representations during memory encoding. Indeed, behavioural pattern separation may be indexed by a visual continuous recognition task in which items are presented in sequence and observers report for each whether it is novel, previously viewed (old), or whether it shares features with a previously viewed item (similar). In comparison to young adults, older adults show a decreased pattern separation when the number of items between “old” and “similar” items is increased. Yet the mechanisms of forgetting underpinning this type of recognition task are yet to be explored in a cognitively homogenous group, with careful control over the parameters of the task, including elapsing time (a critical variable in models of forgetting). By extending the inter-item intervals, number of intervening items and overall decay interval, we observed in a young adult sample (N?=?35, M_age?=?19.56 years) that the critical factor governing performance was inter-item interval. We argue that tasks using behavioural continuous recognition to index pattern separation in immediate memory will benefit from generous inter-item spacing, offering protection from inter-item interference.     

生态心理学——心理学研究模式的转向

生态心理学是西方心理学的一种新取向,它在方法论上倡导将交互作用原则作为主要研究原则,具体来说,就是主张实际生活环境的研究原则、多元方法选择原则、多元交互解释原则,这些原则带来了心理学研究模式的转向：从探讨思辨中或实验室中的心理向探讨真实环境中的心理转变;从人的心理内部机制的探求转向对人和环境互动关系的探求;从对理论模型的追问到对理论背景与实验设计之间匹配的关注;从分析性思维模式为主转向综合性思维模式。     

综合医院心理病房管理模式的探讨研究

为了探讨建立综合医院开放式心理病房新型管理模式的意义及可行性,对郑州市第九人民医院心理科病房采用开放式管理模式,分析480例住院患者的疗效.结果显示,综合医院开放式心理病房管理模式具有疗效好、住院周期短等优点,提示综合医院开放式心理病房有利于精神病的治疗.     

Supine defense in the intraspecific fighting of male house mice mus domesticus

House mice have been reported rarely to perform the supine behavior pattern as a defensive tactic during intraspecific fighting. However, in this study of intraspecific fighting by male mice, it is shown that mice do indeed rotate to supine. This maneuver is used to evade or extricate themselves from bites to the lower dorsum by the attacking opponent. Once free from the bite the defender does not remain supine, but will immediately turn to prone and flee. Remaining motionless in the supine position may serve a submissive function in other species, but this does not seem to be the case for mice. The present findings illustrate that the supine tactic is a dynamic maneuver for defense of body areas targeted by the opponent. © 1992 Wiley-Liss, Inc.     

Meter isn't everything: The case of a timeline-oriented Cuban polyrhythm

Meter serves as a robust temporal referent for the creation and perception of musical rhythm. In music from Africa and the diaspora, a parallel referent is often present in the form of repetitive rhythmic patterns known as timelines. This paper examines how a well-known timeline (the standard pattern) serves as a grounding framework for quinto (lead conga drum) rhythms heard in different drumming performances of Afro-Cuban rumba columbia. Focusing on the layout of alignment points between the constituent elements of the various temporal layers—rhythm, timeline, and possible meters—indicates that the quinto players may be orienting their playing according to the timeline's onsets.     

老年人整体运动敏感性降低的脑灰质体积变化基础

本研究使用多体素模式分析方法和随机点阵范式,首次探索了老年人整体运动敏感性（GMS）下降和其脑灰质体积下降间的关系。结果发现,老年人GMS显著低于年轻人,老年人V5/MT、V3和额顶等脑区灰质体积显著小于年轻人;V5/MT和V3区的灰质体积信号可以有效预测个体的GMS。结果提示,V5/MT区和V3区,特别是V3区的灰质体积下降可能是老年人GMS下降的主要原因;而基于“去分化假设”,全脑范围内其余脑区的灰质体积下降可能也在一定程度上与老年人GMS下降有关。