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.     

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。     

Detection of Threats under Inattentional Blindness and Perceptual Load

Inattentional blindness refers to the failure to detect the salient unexpected stimuli in one’s visual field when performing an attention-demanding task. The present study examined the detection of threats in a static inattentional blindness paradigm. And the detection rates of evolutionary and ontogenetic threats were compared. Participants counted the number of color words from among three (low load) or six (high load) items presented in a circular array. On the last of six trials, an unexpected threatening/neutral illustration was presented in the center of the array along with the task stimuli. Participants detection of the illustration were thus measured and analyzed. The results suggested that: (1) the threatening stimuli, both evolutionary and ontogenetic, were detected more frequently than non-threatening stimuli; (2) the unexpected illustrations were identified more frequently under low-load condition than under high-load condition; (3) even under high-load situation, the threatening illustrations were more frequently identified than neutral ones. Threats are more likely to be detected under inattentional blindness and perceptual load.     

学习者生成图解对说明文阅读理解和应用的效果

在112名大学生被试阅读难度不同的两种材料并解答相关的理解题和应用题时,按照阅读时是否要求生成图解与答题时是否允许生成图解两个条件将他们平均分为四个小组,探讨阅读画图与答题画图对被试理解和应用不同难度材料的影响。结果表明,阅读时学习者生成的图解可显著促进对难度较高材料的理解;答题时学习者生成的图解可显著促进对难度较低材料的应用;阅读时是否画图与答题时是否画图对理解和应用所学习材料没有显著交互作用。     

不同文章难度条件下文化特征类型熟悉度对阅读理解的影响

该研究考察了非英语专业具有不同英语语言水平学习者在不同难度条件下两种文化特征熟悉度对阅读理解的影响。研究发现：（1）语言水平高,或对材料背景熟悉的学习者可通过调用熟悉的文化背景知识帮助阅读理解,其得分均高于低水平,或对材料不熟悉的学习者;（2）在熟悉的文化背景条件下,当材料难度与学习者语言水平基本一致时,语言水平低的学习者也可较好地运用熟悉的文化背景知识帮助阅读理解。实验结果表明：文化特征的内容熟悉度和英语语言水平（或文章难度）对阅读理解起着重要作用,语言水平越高,作用越大。     

汉字输入法对汉字字词加工的影响研究

用形似判断和同音判断作业就输入法对汉字字词加工的影响作了考察。结果表明,汉字输入法及输入速度对小学生语文学习存在明显的影响．但这种影响作用仪表现在汉字认知加工的较低层面。具体本研究而言,纵横输入法和拼音输入法对汉字认知加工的“形”和“音”均存在影响,但前者侧重于“形”．而后者侧重于“音”。笔者认为其直接原因是学生为提高汉字输入速度所付出的额外练习(相比于输入速度低的学生)所导致的．输入法充当了一种作用载体。     

应对研究中的生态学思想述评

应对是心理学界研究的热点,对应对相关研究中的生态学思想进行挖掘、梳理、总结并进一步推广是非常有意义的,能够使应对的研究更加深入,更具真实性。对国内外应激—应对模型、应对与发展、应对与生态学、应对与环境方面的研究探讨进行总结,挖掘其中的生态学思想,为日后应对的理论和实证研究奠定基础,并基于此提出了应对的生态瞬时评估（EMA）研究的设想。     

颈动脉病变的治疗现状

颈动脉病变尤其是颈动脉狭窄治疗上的分歧,颈动脉内膜切除术受欧美学者推崇,颈动脉支架成形技术受国内学者青睐,本文就近年来的文献复习发现颈动脉内膜切除术和颈动脉支架成形术各有相宜的适应证.各有优缺点,根据各自医院的设备条件、医师对颈动脉内膜切除术和颈动脉支架成形术熟悉程度来开展工作,对颈动脉狭窄治疗均有益处,存在的问题和困难还需进一步完善.