Perception of the stereokinetic illusion by the common marmoset (<Emphasis Type="Italic">Callithrix jacchus</Emphasis>)

Stereokinetic illusions have never been investigated in non-human primates, nor in other mammalian species. These illusions consist in the perception of a 3D solid object when certain 2D stimuli are rotated slowly in the plane perpendicular to the line of sight. The ability to perceive the stereokinetic illusion was investigated in the common marmoset (Callithrix jacchus). Four adult marmosets were trained to discriminate between a solid cylinder and a solid cone for food reward. Once learning criterion was reached, the marmosets were tested in sets of eight probe trials in which the two solid objects used at training were replaced by two rotating 2D stimuli. Only one of these stimuli produced, at least to the human observer, the stereokinetic illusion corresponding to the solid object previously reinforced. At test, the general behaviour and the total time spent by the marmosets observing each stimulus were recorded. The subjects stayed longer near the stimulus producing the stereokinetic illusion corresponding to the solid object reinforced at training than they did near the illusion corresponding to the previously non-rewarded stimulus. Hence, the common marmosets behaved as if they could perceive stereokinetic illusions.     

The role of gamma band oscillations and synchrony on rubber hand illusion and crossmodal integration

The rubber hand illusion represents an illusory experience during the mislocalization of own hand when correlated visuotactile stimuli are presented to the actual and fake hands. The visuotactile integration process appears to cause this illusion; the corresponding brain activity was revealed in many studies. In this study, we investigated the effect of the rubber hand illusion on the crossmodal integration process by measuring EEG. The participants who experienced less intensive illusion showed greater congruency effect on reaction time (RT), greater power increase at the parietal zero electrode (Pz) and smaller interelectrode synchrony of the gamma band activity. On the other hand, the participants who experienced more intense illusion showed greater interelectrode synchrony. The results suggested that the gamma band activity in the parietal area reflects the visuotactile integration process and that its synchrony causes the illusory intensity.     

视错觉产生的神经机制

传统认知心理学对视觉错觉的解释存在局限性。认知神经科学在移动错觉、轮廓错觉、颜色错觉研究中的一批新发现,可以综合并概括为一种视错觉发生的神经关联重叠机制。该重叠性表现为错觉与相应的真实知觉具有本质上相同的神经活动,即错觉与真实知觉享有共同的神经关联,没有只对错觉反应而不对真实知觉反应的特定神经关联物,而错觉神经活动的特别之处是在真实知觉发生的相同脑区有更强烈的激活     

十文钱问题：中国一古老推理错觉问题初探

首先简要阐述了中国一古老推理问题——十文钱问题的学术价值,然后在研究1中通过调查法对其进行了研究。结果发现,该问题应该属于典型的推理错觉问题,且其错觉产生的原因可能是运用单式记账方式进行推理的结果;研究2和研究3分别通过口语报告法和实验法获得了支持这一假设的证据,但同时也发现记账方式问题可能也并不是问题的全部,其中财会事项发生的顺序所形成的循环结构可能也是问题困难原因之一,这一假设在研究4中得到了支持     

Law,Ethics, and the Needs of History: Mendelssohn,Krochmal, and Moral Philosophy

Although the role of ethics in modern Jewish thought has been widely explored, major works by foundational philosophers remain largely absent from such discussions. This essay contributes to the recovery of these voices, focusing on the Hebrew writings of Moses Mendelssohn (1729–1786) and Nachman Krochmal (1785–1840). I argue that these texts reveal the existence of a shared ethical project animating these founding philosophical voices of Jewish modernity, and that reconstructing their claims contributes to broader conversations about the relationship between ethics and law. Mendelssohn and Krochmal present Jewish law as addressing needs emerging from the history of moral philosophy—from the modern histories of Platonic and Aristotelian ethics. Moreover, my reading highlights these thinkers’ ongoing relevance, suggesting that their work illuminates the role of law in ethical cultivation.     

Attenuation of size illusion effect in dual-task conditions

We over-estimate or under-estimate the size of an object depending its background structure (e.g., the Ebbinghaus illusion). Since deciding and preparing to execute a movement is based on perception, motor performance deteriorates due to the faulty perception of information. Therefore, such cognitive process can be a source of a failure in motor performance, although we feel in control of our performance through conscious cognitive activities. If a movement execution process can avoid distraction by the illusion-deceived conscious process, the effect of the visual illusion on visuomotor performance can be eliminated or attenuated. This study investigated this hypothesis by examining two task performances developed for a target figure inducing the Ebbinghaus size illusion: showing visually perceived size of an object by index finger-thumb aperture (size-matching), and reaching out for the object and pretending to grasp it (pantomimed grasping). In these task performances, the size of the index finger-thumb aperture becomes larger or smaller than the actual size, in accordance with the illusion effect. This study examined whether the size illusion effect can be weakened or eliminated by the dual-task condition where actors’ attention to judge the object’s size and to produce the aperture size is interrupted. 16 participants performed the size-matching and pantomimed grasping tasks while simultaneously executing a choice reaction task (dual task) or without doing so (single task). Using an optical motion capture system, the size-illusion effect was analyzed in terms of the aperture size, which indicates the visually perceived object size. The illusion effect was attenuated in the dual task condition, compared to it in the single task condition. This suggests that the dual task condition modulated attention focus on the aperture movement and therefore the aperture movement was achieved with less distraction caused by illusory information.     

Your life satisfaction will change more than you think: A comment on Harris and Busseri (2019)

Harris and Busseri (2019) examined the changes in life satisfaction people predicted vs. experienced for 30-years based on the three waves of the Midlife in the United States (MIDUS) survey. They conclude that “Contrary to the EOHI [end of history illusion], most individuals either were accurate or anticipated too much change into the future, rather than too little” (abstract). Examining these same data we arrive at the opposite conclusion, that people systematically underestimate future changes to their life satisfaction. The discrepancy arises because Harris and Busseri find stability in the average life satisfaction across the entire sample, while we find instability in life satisfaction within individuals. Both of these can happen. Although the average altitude of all the elevators in a skyscraper is remarkably stable over time, the altitude of each elevator changes by the second.     

Sustained perceptual invisibility of solid shapes following contour adaptation to partial outlines

Contour adaptation (CA) is a recently described paradigm that renders otherwise salient visual stimuli temporarily perceptually invisible. Here we investigate whether this illusion can be exploited to study visual awareness. We found that CA can induce seconds of sustained invisibility following similarly long periods of uninterrupted adaptation. Furthermore, even fragmented adaptors are capable of producing CA, with the strength of CA increasing monotonically as the adaptors encompass a greater fraction of the stimulus outline. However, different types of adaptor patterns, such as distinctive shapes or illusory contours, produce equivalent levels of CA suggesting that the main determinants of CA are low-level stimulus characteristics, with minimal modulation by higher-order visual processes. Taken together, our results indicate that CA has desirable properties for studying visual awareness, including the production of prolonged periods of perceptual dissociation from stimulation as well as parametric dependencies of that dissociation on a host of stimulus parameters.     

The double-edged pen: Omnipotent fantasies in the creativity and addictions of Stephen King

The legendary debate over whether a connection between creativity and addictions exists is one that is shrouded in mystery and intrigue, but also one that continuously returns to the circuitous metaphor of the chicken and the egg. In an effort to better understand nuances in the relationship between creativity and addictions, this paper examines the life of Stephen King, and the omnipotent fantasies from which both his creative processes and addictive behaviours emerged. Since the early twentieth century, psychodynamic thinkers have highlighted omnipotent fantasies as a psychological force driving creative processes as efforts towards personal transformation. Similarly, numerous psychodynamic theories have highlighted omnipotent fantasies as playing a cardinal role in the psychological processes that propel substance abuse. And yet, the construct of omnipotence has yet to be examined as a theoretical bridge to bind such theories of creativity and substance abuse together. While fostering personal meaning and self-transformation when manifested in his creative writing processes, omnipotent fantasies have also lead Stephen King down a precarious path of addictive behaviours. Through a narrative analysis of the life of Stephen King, who has written in great depth about both his creativity and substance abuse, I will illustrate how omnipotent fantasies often shape and foster both healthy, creative processes towards growth and maladaptive, addictive impulses towards self-destruction.     

Illusory line motion is not caused by object-differentiating mechanisms or endogenous attention

Christie and Klein [2005. Does attention cause illusory line motion? Perception & Psychophysics, 67(6), 1032–1043] published line motion ratings consistent with illusory line motion (ILM) after peripheral endogenous cues but not central arrow cues. When attention was directed endogenously on the basis of the shape of one of two peripherally presented objects, participants reported small, but significant motion away from the attended object, and this was attributed to participant bias, or to a peripherally directed object-based attention system endogenously recruited to differentiate the peripheral shapes. By using a unique cueing method with identical peripheral markers, but still allowing them to act as cues, the findings of Christie and Klein Experiment 4 were replicated. This reduces the likelihood that object discrimination or object attention mechanisms are responsible for the reported ILM-like effects.