刺激前alpha振荡对视知觉的影响

人类对感觉阈限附近的视觉刺激的知觉不总是一致的。为探究这种视知觉不一致的现象及其神经机制, 一些研究者关注刺激前脑内自发alpha神经振荡(8~13 Hz)对视知觉的影响。近年来的研究发现, 刺激前alpha振荡能量的降低能提高被试的探测击中率, 但不能提高知觉精确度; 而刺激前alpha振荡的相位能预测被试能否成功探测刺激。刺激前alpha能量被认为调控了视皮层的基础活动强度; alpha能量的降低反映了皮层基础活动的增强, 进而提高了对较弱刺激的探测率。刺激前alpha相位则被认为调控了皮层兴奋和抑制的时间; 大脑在刺激呈现时的不同状态(兴奋/抑制)决定了最终的知觉结果。     

视觉语言对听觉障碍人群阅读能力的影响及作用机制

听觉障碍人群由于听觉部分或完全受损, 视觉语言——唇读和手语就成为其阅读能力发展的主要途径。唇读有助于听觉障碍人群形成语音表征, 与词汇知识相互影响, 且可以促进字词阅读及阅读理解的水平; 口语或书面语的加工可以激活相应的手语表征, 手语影响着听觉障碍人群各个层次的阅读能力。未来研究应该关注语音意识、词汇知识等技能在视觉语言影响听觉障碍人群阅读能力过程中的作用机制, 并以视觉语言为中心, 发展出适合汉语听觉障碍人群阅读能力习得的理论模型。     

Using e-learning modules to teach ongoing-visual inspection of functional analyses

Despite the effectiveness of function-based treatments, most clinicians do not conduct functional analyses (FA). The time required to conduct an FA is a major barrier preventing their use. One way to increase FA efficiency is to discontinue the analysis as soon as it has produced clear results. Saini et al. (2018) evaluated a structured procedure for ongoing-visual inspection of FAs and found that it produced accurate interpretations while averaging 40% fewer sessions than author interpretation. This study evaluated the efficacy of an e-learning module for training registered behavior technicians (RBTs) to implement ongoing visual inspection of FAs. Following training, 5 of the 6 participants showed mastery of ongoing visual inspection, and the final participant did so with the addition of supplemental procedures. We discuss how this training may increase the efficiency of FAs by teaching individuals who are less experienced in FA methodology when to seek supervision from a supervising Board Certified Behavior Analyst® (BCBA).     

Individual differences in echocardiography: Visual object recognition ability predicts cue utilization

Echocardiographers are highly specialised, skilled practitioners who play a critical role in medical imaging diagnostics. Yet, little is known about the cognitive and perceptual attributes of experts within this domain. This study was designed to examine the role of individual differences in expertise. Specifically, the contribution of a domain general visual expertise and pattern recognition, or cue utilization. Data were collected from 42 echocardiographers and 43 naïve participants. All of the participants competed the Novel Object Memory Test (NOMT). When compared, the echocardiographers were more accurate than the naïve participants. The echocardiographers also completed an echocardiography edition of the Expert Intensive Skills Evaluation 2.0, to establish behavioral indicators of context-related cue utilization. Those with relatively higher cue utilization performed more accurately on the NOMT, controlling for exposure. These results suggest that a general perceptual ability contributes to echocardiography potential and a sensitivity to cue-based learning may contribute to expertise.     

快速阅读训练对基于视觉定向搜索的注意力影响：ERP研究

以视觉搜索任务为检测作业,运用事件相关电位（ERPs）技术,考察快速阅读训练对神经系统注意功能的影响。进行视觉定位搜索测试,被试后测ERP成分P200在电极点F3的波幅较前测显著减小,但P130在电极点P7的潜伏期显著长于前测,N200在电极点P7的波幅较前测显著增大;进行视觉顺序搜索测试,被试后测ERP成分P130在电极点P7的潜伏期显著长于前测,N120在电极点P7的波幅显著大于前测;对于相同的视觉搜索任务,被试后测的反应时和作答率均优于前测,且被试进行顺序搜索时的作答率前后测差异具有显著性。结果表明,经过快速阅读训练,被试的前额叶功能和外源性注意功能可能得到了激活和扩大。     

The Marginality of Phenomenology

The essence of Husserl’s intentionality does not lie in any object, but in the marginal horizon presupposed by intentional acts. This characteristic can be seen whether on the level of intensional act or that of noema (intentional object). The reason is that all intentional act and noema come from the stream of internal time consciousness, and thus have Zeithof (time halo or time aureole), while the original meaning constituted by such a halo is prior to the object they are concretized into, and the noema that contains the possibility of meaning will also be intuited together with the perceived adumbration. Using Husserl’s idea that the meaning of non-objectification is prior to the object, Scheler breaks through Husserl’s dogma that the presentation of an object must precede the giving of value to the object, and thus puts forward the new train of thought that the feeling of value is not later than the objectification, or even prior to it. Heidegger deepens and expands the sense of the marginal horizon, revealing in all human behaviors and world presentation such an ontological structure, that is, halo-like meaning or the act of Being itself precedes objects and beings created by the separation of subject and object. Maurice Merleau-Ponty states that the body field is prior to the separation of body and mind, and the body’s perception of external phenomena is first carried out in the manner of field rather than definite objects, therefore, it must have the original ambiguity and be realized in the form of body schema instead of a causal chain. So, the philosophical vitality of phenomenology does not significantly lie in the explanation of the levels and functions of intentional objects, but in the construction premise of such objects, namely, the spatio-temporal halo manifested as marginal horizon, time stream, and the displaying of existential vista.     

身体拥有感错觉对疼痛的影响及其作用机制

身体拥有感错觉以多通道的感官整合为基础,包括视觉-触觉、视觉-本体感觉、触觉-本体感觉、视觉-内感受的整合等。来自实验室急性痛以及慢性痛的大量结果表明拥有感错觉可产生镇痛作用。身体部位尺寸大小、肢体透明度等相关影响因素也逐渐得到揭示。拥有感错觉影响疼痛的机制与身体表征的改变有关,该过程可能涉及“身体网络”与“疼痛网络”间的连接,其中后顶叶皮层可能有重要作用。未来研究应更为深入地探索拥有感错觉范式以考察不同因素对疼痛的影响;在现有多感官整合的范式中重视内感受的作用;考察拥有感错觉改变疼痛的认知神经机制;区分急、慢性痛条件下以及不同慢性痛类型中拥有感错觉对疼痛的不同影响。     

中文发展性阅读障碍研究

本文总结了作者有关中文发展性阅读障碍的部分研究成果,探讨了阅读困难儿童词汇加工的特征及其本质,讨论了中文阅读技能与其他认知加工,特别是基本视知觉的关系.文章指出阅读障碍儿童由于词汇识别水平低,他们在汉字识别过程中表现出比同年龄的控制组更大的规则性效应,在语义通达过程中,对语音的依赖较大.阅读障碍儿童不仅在汉字的命名速度上慢于控制组儿童,数字的语音通达速度也慢于控制组儿童.文章还总结了汉字阅读与视知觉的关系,发现视觉加工对字形相似性判断有较大的解释作用.     

眼见为实?视觉搜索的证实反应与策略反应

为检验视觉搜索加工过程中目标驱动与刺激驱动的制约关系,本研究采用视觉搜索范式,操作靶目标颜色与样例颜色是否匹配,以及搜索刺激集的样例颜色比例两个搜索难度变量;并根据靶目标兴趣区注视点情况,把搜索策略划分为证实反应与策略反应。结果表明,在搜索难度增加时,证实反应的比例下降,而策略反应的比例上升,这表明搜索策略的转换优化了注意选择功能。     

Atmosphere in an urban nightlife setting: A case study of the relationship between the socio‐physical context and aggressive behavior

Aggression is strongly influenced by the surrounding socio‐physical context, and the development of aggressive behavior is best understood through a continuous cycle of ongoing person‐environment interactions. Empirical studies, nevertheless, have been predominantly conducted in the laboratory, studying aggression as a short‐lived phenomenon, emerging from and within an individual, and – with situational factors studied in isolation – devoid of its context. The present field study, conducted in an urban nightlife area, complements this research. A qualitative, multi‐method approach was followed by thematic analysis to investigate ongoing behavioral patterns of the crowd vis‐à‐vis the changes in the context that co‐occurred with the development of unwanted behaviors, including aggression. In our study, we identified atmosphere as a dynamic and mood‐like, but extra‐individual state of the socio‐physical setting related to the development of aggression. Our results suggest that atmosphere affects the behavior of groups and individuals by emerging from and feeding into ongoing interactions between people and the environment. At the individual level, it appears to play its part as proximate determinant of behavior; at the crowd level it reflects the synergetic product of all those persons’ states, behaviors and interactions. Implications for aggression theory and for applications aimed at curbing aggression are discussed.