Divided stimulus control: a replication and a quantitative model

Four pigeons were trained on a conditional discrimination. The conditional stimuli were compounds of pairs of stimuli from two different dimensions, fast versus slow cycles of red or green stimuli, and short- versus long-duration presentations of these cycles. Across conditions, the probability of reinforcers for correctly responding to each dimension was varied from 0 to 1. Discriminability, measured by log d, for stimuli on a dimension increased as the relative frequency of reinforcers for that dimension increased, replicating the results of Shahan and Podlesnik (2006). Two further conditions showed that discriminability between stimuli on each dimension was unaffected by whether the stimuli on the other dimension varied or were constant. Finally, maximal discriminability was unchanged in a redundant-relevant cues condition in which either of the stimuli comprising a compound signaled the same correct response. Davison and Nevin's (1999) model provided an excellent quantitative account of the effect of relative reinforcer frequency on discriminability, and thus of the way in which divided stimulus control is itself controlled by relative reinforcement.     

Individual differences in ERPs during mental rotation of characters: Lateralization,and performance level

The cognitive process of imaging an object turning around is called mental rotation. Many studies have been put forward analyzing mental rotation by means of event-related potentials (ERPs). Event-related potentials (ERPs) were measured during mental rotation of characters in a sample (N = 82) with a sufficient size to obtain even small effects. A bilateral ERP amplitude modulation as a function of angular displacement was observed at parietal leads without any lateralization. Sex had no effect on mental rotation of characters, neither with respect to performance nor with respect to brain potentials. When the sample was split into groups of high- and low-performers, however, the results indicated (a) in line with the idea of neural efficiency substantially larger amplitudes for low-performers; (b) that the smaller amplitudes of the high-performers involved larger parietal networks; and (c) a left-parietal disengagement of neural activity for high-performers but a right-parietal disengagement for low-performers. The latter finding became evident through an analysis of internal consistencies of ERP amplitudes across conditions and performance levels, showing that internal consistencies were reduced at all three leads in the high-performance group for the biggest rotation angle, relative the other conditions and the low-performing group.     

Visual enhancement of touch and the bodily self

We experience our own body through both touch and vision. We further see that others’ bodies are similar to our own body, but we have no direct experience of touch on others’ bodies. Therefore, relations between vision and touch are important for the sense of self and for mental representation of one’s own body. For example, seeing the hand improves tactile acuity on the hand, compared to seeing a non-hand object. While several studies have demonstrated this visual enhancement of touch (VET) effect, its relation to the ‘bodily self’, or mental representation of one’s own body remains unclear. We examined whether VET is an effect of seeing a hand, or of seeing my hand, using the rubber hand illusion. In this illusion, a prosthetic hand which is brushed synchronously—but not asynchronously—with one’s own hand is felt to actually be one’s hand. Thus, we manipulated whether or not participants felt like they were looking directly at their hand, while holding the actual stimulus they viewed constant. Tactile acuity was measured by having participants judge the orientation of square-wave gratings. Two characteristic effects of VET were observed: (1) cross-modal enhancement from seeing the hand was inversely related to overall tactile acuity, and (2) participants near sensory threshold showed significant improvement following synchronous stroking, compared to asynchronous stroking or no stroking at all. These results demonstrate a clear functional relation between the bodily self and basic tactile perception.     

主、宾关系从句加工不对称性效应及其神经机制

句子加工领域内, 主、宾关系从句加工不对称性效应是诸多语种内普遍存在的一种语言现象。本文对主、宾关系从句加工不对称性效应从如下几个方面进行了分析和论述：①从成人语言、儿童语言和失语症患者三个领域并结合印欧语系和非印欧语系的语言特征, 详细分析了该效应及其普遍性和特殊性; ②主、宾关系从句加工不对称性效应的理论解释：句法角色理论、“填充语-空位”依附理论、积极填充策略、名词短语可及性层级理论和干扰相似性理论; ③与主、宾关系从句加工不对称性效应有关的脑电成分及相应的脑区激活模式的分析。最后, 在对已有理论评价分析的基础上, 提出“标记浮动”句子加工理论模型, 并指出该领域未来的研究方向。     

克雷佩林连续加算法的初步研究

本研究遵循克雷佩林连续加算法的基本原则,参照内田-克雷佩林心理测验的基本形式和操作方法．并加以改进．编制了一套作业法测验,并建立了数量化评定指标——相对作业量。通过对近2500名学生被试进行初步研究,该测验具有较好的信度和效度,以相对作业量为标准可以较客观地判定作业曲线的凹陷和凸起等形态特征。这对于连续加法计算作业在中国的推广应用以及教育、科研、心理咨询、职业指导等工作具有重要的意义。     

关于气质类型与相对学业不良的相关研究

本研究考察了226名大、中学生的气质类型与学业成就的关系,结果发现：无论哪个学习年限段的学生的气质类型中,与胆汁质、抑郁质有关的气质类型与学业不良有关。并认为其主要以任务坚持性和社会灵活性缺乏为特征影响学业不良学生的学习成就。     

On the minimal relative motion principle—the oscillating tilted bar

Beghi, Xausa, Tomat, and Zanforlin (J. Math. Psychol. 41(1997) 11) present a visual stereokinetic illusion. In the image plane, one end of an oblique bar moves horizontally back and forth, while the other end is stationary. Perceptually, this becomes a bar of a constant length rotating in depth around a vertical axis that passes through the stationary end of the bar. Beghi et al. (1997) provide a mathematical model of minimal relative motion to account for this percept. Here we show that the minimal relative motion principle cannot explain the perceptual phenomenon. Specifically, we raise two objections. (1) It is necessary to consider not only the length, but also the direction, of a vector when comparing vector fields. In fact, when directions are taken into consideration, Beghi et al.'s mathematical result diverges from their perceptual experimental result. (2) There is a mathematical inconsistency in Beghi et al. (1997): mixing absolute and relative velocities in their minimization is unwarranted, and does not lead to correct minimization.     

试论科学发展观下的新经济公平与效率观

有什么样的发展观 ,就会有什么样的公平观与效率观。在传统的发展观下 ,经济公平与经济效率之间的冲突是矛盾的主要方面 ,“效率优先、兼顾公平”的政策主张明显地带有“追求生产性效率”的倾向。科学发展观下的“经济效率”立足于经济 ,但又超越经济 ,它在内涵上把经济效益与社会效益、经济发展与人类自身发展、人的近期需求与长远需求统一了起来。遵循科学发展观 ,经济效率与经济公平之间就会日益协调与相容。这有利于整个社会经济的持续、快速、协调发展 ;有利于消解人与人 ,人与自然关系的紧张 ,促进人类文明。     

恶“德”——一种特殊的道德现象

人类竭尽所能 ,在最大的限度上去减少各种罪恶 ,其中 ,包括恶“德”的手段在内。为了更好地运用恶“德”这种手段 ,加强对它的研究和运用是十分必要的。