Response-initiated imaging of operant behavior using a digital camera

A miniature digital camera, QuickCam Pro 3000, intended for use with video e-mail, was modified so that snapshots were triggered by operant behavior emitted in a standard experimental chamber. With only minor modification, the manual shutter button on the camera was replaced with a simple switch closure via an I/O interface controlled by a PC computer. When the operant behavior activated the I/O switch, the camera took a snapshot of the subject's behavior at that moment. To illustrate the use of the camera, a simple experiment was designed to examine stereotypy and variability in topography of operant behavior under continuous reinforcement and extinction in 6 rats using food pellets as reinforcement. When a rat operated an omnidirectional pole suspended from the ceiling, it also took a picture of the topography of its own behavior at that moment. In a single session after shaping of pole movement (if necessary), blocks of continuous reinforcement, in which each response was reinforced, alternated with blocks of extinction (no reinforcement), with each block ending when 20 responses had occurred. The software supplied with the camera automatically stored each image and named image files successively within a session. The software that controlled the experiment also stored quantitative data regarding the operant behavior such as consecutive order, temporal location within the session, and response duration. This paper describes how the two data types--image information and numerical performance characteristics-can be combined for visual analysis. The experiment illustrates in images how response topography changes during shaping of pole movement, how response topography quickly becomes highly stereotyped during continuous reinforcement, and how response variability increases during extinction. The method of storing digital response-initiated snapshots should be useful for a variety of experimental situations that are intended to examine behavior change and topography.     

Influence of vestibular signals on bodily self-consciousness: Different sensory weighting strategies based on visual dependency

Previous studies showed that the vestibular system is crucial for multisensory integration, however, its contribution to bodily self-consciousness more specifically on full-body illusions is not well understood. Thus, the current study examined the role of visuo-vestibular conflict on a full-body illusion (FBI) experiment that was induced during a supine body position. In a mixed design experiment, 56 participants underwent through a full-body illusion protocol. During the experiment, half of the participants received synchronous visuo-tactile stimulation, and the other half received asynchronous visuo-tactile stimulation, while their physical body was lying in a supine position, but the virtual body was standing. Additionally, the contribution of individual sensory weighting strategies was investigated via the Rod and Frame task (RFT), which was applied both before (pre-FBI standing and pre-FBI supine) and after the full-body illusion (post-FBI supine) protocol. Subjective reports of the participants confirmed previous findings suggesting that there was a significant increase in ownership over a virtual body during synchronous visuo-tactile stimulation. Additionally, further categorization of participants based on their visual dependency (by RFT) showed that those participants who rely more on visual information (visual field dependents) perceived the full-body illusion more strongly than non-visual field dependents during the synchronous visuo-tactile stimulation condition. Further analysis provided not only a quantitative demonstration of full-body illusion but also revealed changes in perceived self-orientation based on their field dependency. Altogether, findings of the current study make further contributions to our understanding of the vestibular system and brought new insight for individual sensory weighting strategies during a full-body illusion.     

自我—他人危机决策信息加工过程的差异:来自眼动的证据

本研究采用iView X-RED眼动仪,分两个实验来考察自我-他人危机决策的信息加工过程的差异。实验一采用单因素实验设计探讨自我-他人危机决策的信息加工过程,结果表明：为自我决策组的平均阅读时间、平均注视时间、平均注视次数、平均凝视时间、平均回视次数都显著高于为他人决策组。实验二采用2（任务框架：积极,消极）x2（决策者角色：为自我、为他人）混合实验设计,结果表明：在积极框架下,为自我决策组平均阅读时间、平均注视时间、平均注视次数、平均凝视时间、平均回视次数显著高于为他人决策组;在消极框架下,两个组没有显著差异。总体表现为,自我-他人危机决策的信息加工过程存在差异,且受任务框架的影响。     

任务框架和序列趋势对趋势阻尼的影响

以往研究发现,下降序列的趋势阻尼大于上升序列,但该结论可能掺杂了任务框架这一额外变量。基于此实验1选取可控事件,实验2选取不可控事件作为背景,探讨了任务框架和序列趋势对趋势阻尼的影响。研究发现：不管在可控事件还是不可控事件中,序列趋势对趋势阻尼的影响都受到任务框架的调节,收益框架中下降序列的阻尼大于上升序列,损失框架中两者差异不显著。     

群体共情对群际关系的影响：基于社会冲突解决的视角

摘要：群体共情是指群体成员内化和间接体验另一群体成员的认知和情绪情感的过程。群体共情与个体共情不同,表现在身份感、共情偏好和文化影响的差异等方面。群体共情对群际关系具有促进作用,有助于减少群际冲突,促进群际亲社会行为。共情动机和文化框架转换是分析群体共情对群际关系促进机制的两个视角。未来研究可以探索群体共情与个体共情神经机制的差异,建立群体共情对群际关系影响的综合模型,探索群体共情在群际关系改善中的作用机制。     

The concept of the 50-minute hour: Time forming a frame for the unconscious

Abstract

The 50-minute hour is a feature of psychoanalytic work that is most commonly discussed in the context of case reports. This paper examines it as a concept. The author starts by describing the origin of the 50-minute hour and its development as an element of the psychoanalytic setting or framework. Next, he considers the significance of the clock as a relational factor in the session and reflects on the alienness of the time of day to the unconscious, and the consequences of this alienness. He then uses a clinical example to illustrate the phenomenon of the stretching effect of time in analytic sessions. Finally, the author demonstrates how cleverly the 50-minute hour excises the time needed for unconscious processes from our accelerated present; he shows that it challenges the social convention of time, and has a structuring effect in that it “times” psychic processes.     

Does inversion affect boundary extension for briefly-presented views?

Inverting scenes interferes with visual perception and memory on many tasks. Might scene inversion eliminate boundary extension (BE) for briefly-presented photographs? In Experiment 1, an upright or inverted photograph (133, 258, or 383?ms) was followed by a 258 ms masked interval and a test photograph showing the identical view. Test photographs were rated as “same”, “closer”, or “farther away” (5-point scale). BE was just as great for inverted as upright views at the 133 and 383 ms durations, but surprisingly was greater for inverted views at the 258 ms duration. In Experiment 2, 258-ms views yielded greater BE when the study photographs were always tested in the opposite orientation, indicating that the difference in BE was related to encoding. Results suggest that scene construction beyond the view boundaries occurs rapidly and is not impeded by scene inversion, but that changes in the relative quality of visual details available for upright and inverted views may sometimes yield increased BE for inverted scenes.     

身体意象可塑吗?——同步性和距离参照系对身体拥有感的影响

身体意象是个体在意识层面对与身体有关的知觉、态度及信念,它的稳定性与可塑性一直存在争论。本研究使用方位追踪仪、数据手套及投影仪,通过2个实验考查虚拟手错觉中距离参照系对身体拥有感的影响。实验1在虚拟环境中采用经典橡胶手错觉的变式,考察同步性和虚拟手位置对拥有感的影响;实验2引入距离参照系,考察在不同参照条件下被试对同一个位置的虚拟手在不同同步情况下的拥有感错觉。研究结果发现:(1)无论是同步性还是距离都会对虚拟手错觉中的拥有感产生影响,即同步比不同步条件下、距离近比距离远条件下拥有感显著;(2)不同的距离参照系对同一位置的拥有感体验影响差异显著,先近后远的呈现方式会减弱错觉而先远后近的呈现方式则会加强错觉。这一发现与身体拥有感是受稳定的身体意象调节的假设并不一致。