授权型领导的负面效应：理论机制与边界条件

已有研究主要关注授权型领导的正面影响, 然而, 新近的研究表明授权型领导可能也会引发潜在的负面效应。针对此问题, 首先界定了授权型领导的概念及其核心特征。其次, 基于双重任务加工效应、角色理论和内隐领导理论, 阐释了授权型领导负面效应的理论机制, 并进一步分析和总结了授权型领导的有效性在何种条件下能够实现。最后, 提出了授权型领导负面效应未来研究方向的建议。     

Using intraverbal prompts to increase divergent intraverbal responses by a child with autism

We examined the effectiveness of intraverbal prompts to increase the number of divergent responses to categorical questions composed of compound stimuli (e.g., Name some red things) for a 6‐year‐old child with autism. The intraverbal prompts involved providing the function, feature, and class of the target responses. A multiple probe across behaviors design was used. Results indicated that the child's total number of divergent responses was increased and maintained during 2‐week follow‐up probe trials. Novel responses were observed across conditions.     

Welcome to “the Rock”: Service Providers’ Views on Newcomer Youth Integration in Newfoundland and Labrador

This study investigates the needs of newcomer youth in Newfoundland and Labrador, and the services provided to them in the provincial capital, St. John’s, through the lens of service providers. We employ Bronfenbrenner’s bioecological model (1999, 2005) as the conceptual framework to explore how various ecological systems interact with one another to influence the development of newcomer youth. Data were drawn from 33 semi-structured interviews with personnel in various immigrant and refugee support agencies, medical and counseling units, municipal recreational offices, and educational programs, as well as ten observations of their programs. Our findings indicate that the current services and programs provide effective support in a number of areas. However, closer collaboration can be established between schools and community organizations, among different service agencies, and involving the business community. Service gaps identified include a lack of transportation to and from school, insufficient academic bridging programs, and no career counseling catering to newcomer students. We argue that service agencies should consider shifting some of their programs to the newcomer youth’s microsystems of school and family, and that the provincial educational authorities need to look into the transportation issue that infringes upon the rights of these students to appropriate school instruction.     

工作记忆对知觉类别学习的影响:问题与构想

人们学习将感知到的客体按照不同的标准或规则分类存储,即类别学习。而工作记忆作为多种认知加工的基础,对类别学习具有重要作用。基于已有研究,分别梳理了言语工作记忆和视空工作记忆对基于规则和信息整合类别结构的影响。目前,执行功能是否影响内隐类别学习系统、工作记忆负荷对内隐外显类别学习系统的影响是否一致还存在争议。此外,工作记忆影响知觉类别学习的认知加工阶段尚不清晰。未来的研究还需明确工作记忆负荷对内隐和外显类别学习的影响,进一步验证工作记忆影响类别学习的认知加工阶段假设的合理性。     

视频游戏中的化身认同

化身认同是个体在使用和体验游戏化身的过程中,自我知觉发生暂时性改变,并与化身在情绪和认知上的联系暂时加强的心理现象,它为理解化身效应提供了新视角。目前,化身认同的测量模型主要有三维和四维结构模型,其神经机制也得到初步揭示。影响化身认同的因素主要包括游戏自身特点和个体因素。影响效果方面,化身认同与游戏体验、游戏成瘾、攻击行为和自我同一性的关系是目前关注的焦点。未来的研究,仍需深入探讨化身认同的概念与结构,研发更加有效的测量工具,拓展研究方法,丰富研究变量,并加强应用研究。     

绝对音高加工的认知神经机制

绝对音高(absolute pitch,AP)是一种比较罕见的音高加工能力,具有特殊的认知和神经机制。事件相关电位研究表明AP音乐家进行音高命名时,工作记忆参与较少但涉及多个认知策略。功能神经成像研究发现左侧额叶背侧后部和左侧颞叶平面对AP音乐家非常重要,而准AP音乐家(quasi-AP)的某些右侧脑区的参与则反映其增加的音高加工负荷和难度。结构神经成像研究发现AP音乐家具有特殊的灰质结构形态及白质连接。未来研究有待将AP能力进一步分为"具有相对音高能力"与"没有相对音高能力"两类并观察相应的认知神经机制,并通过影像基因组学来探索基因多态性对AP能力的影响,以及有必要观察以声调语言为母语的音乐家进行音高加工的神经机制。     

奖赏对海洛因成瘾者执行功能的影响机制

一些研究发现海洛因成瘾者奖赏失调表现为:对海洛因相关线索的注意偏向、渴求感增加,对金钱奖赏表现出"即时收益优先"的高风险决策模式和对长时收益的敏感性降低。另一些研究发现海洛因成瘾者的执行功能存在障碍。奖赏失调和执行功能障碍在成瘾物质使用的维持和复吸中起着重要作用。双重竞争模型认为奖赏和执行功能的交互作用决定着行为的结果,但是奖赏对海洛因成瘾者执行功能的影响机制还不清楚。因此,拟使用事件相关电位技术来考察海洛因相关线索和金钱奖赏对不同戒断期成瘾者执行功能的影响机制,短期(1~3个月)、长期(18个月以上)海洛因戒断者和健康对照组被比较。这不仅有助于构建完善的成瘾理论体系,还有助于确定临床戒断后复吸的风险因素和不同戒断期的治疗目标。     

Developing new online calibration methods for multidimensional computerized adaptive testing

Multidimensional computerized adaptive testing (MCAT) has received increasing attention over the past few years in educational measurement. Like all other formats of CAT, item replenishment is an essential part of MCAT for its item bank maintenance and management, which governs retiring overexposed or obsolete items over time and replacing them with new ones. Moreover, calibration precision of the new items will directly affect the estimation accuracy of examinees’ ability vectors. In unidimensional CAT (UCAT) and cognitive diagnostic CAT, online calibration techniques have been developed to effectively calibrate new items. However, there has been very little discussion of online calibration in MCAT in the literature. Thus, this paper proposes new online calibration methods for MCAT based upon some popular methods used in UCAT. Three representative methods, Method A, the ‘one EM cycle’ method and the ‘multiple EM cycles’ method, are generalized to MCAT. Three simulation studies were conducted to compare the three new methods by manipulating three factors (test length, item bank design, and level of correlation between coordinate dimensions). The results showed that all the new methods were able to recover the item parameters accurately, and the adaptive online calibration designs showed some improvements compared to the random design under most conditions.     

运动技能水平与躯体感觉输入对运动表象的影响

运动表象质量与运动技能水平有关,运动表象质量随着运动技能水平的提高而上升。器械使用可使人脑产生可塑性改变,使用者会将器械纳入身体图式。然而,两者影响运动表象的神经心理机制还不清楚。本研究采用功能性磁共振成像探析篮球运动员与新手在不同持球条件下表象投篮时脑功能活动的差异。结果表明运动员表象质量较好,镜像神经系统激活高于新手;持球条件下运动员表象质量显著高于不持球条件下,镜像神经系统激活程度显著低于不持球条件下。研究说明持器械可以显著提高运动员的表象质量,器械使用带来镜像神经系统的可塑性变化。     

语音意识、命名速度和语素意识在汉语阅读发展中的作用

以123名小学四、五年级汉语儿童为研究对象,采用回归分析、结构方程模型探讨语音意识、命名速度和语素意识在阅读能力不同方面（准确性、流畅性和理解）的作用。结果显示,语音意识、命名速度和语素意识都是影响阅读能力的重要认知因素,但对不同方面阅读能力的作用存在差异：（1）语音意识、命名速度和语素意识均直接影响阅读准确性,且语素意识的贡献相对较大;（2）命名速度除直接影响阅读流畅性外,还通过阅读准确性的部分中介作用影响阅读流畅性,而语音意识和语素意识则通过阅读准确性的完全中介作用影响阅读流畅性;（3）语音意识、命名速度和语素意识对阅读理解均无直接影响,分别通过阅读准确性和阅读流畅性间接影响阅读理解。