Evaluating a split processing model of visual word recognition: effects of orthographic neighborhood size

The split fovea theory proposes that visual word recognition of centrally presented words is mediated by the splitting of the foveal image, with letters to the left of fixation being projected to the right hemisphere (RH) and letters to the right of fixation being projected to the left hemisphere (LH). Two lexical decision experiments aimed to elucidate word recognition processes under the split fovea theory are described. The first experiment showed that when words were presented centrally, such that the initial letters were in the left visual field (LVF/RH), there were effects of orthographic neighborhood, i.e., there were faster responses to words with high rather than low orthographic neighborhoods for the initial letters ('lead neighbors'). This effect was limited to lead-neighbors but not end-neighbors (orthographic neighbors sharing the same final letters). When the same words were fully presented in the LVF/RH or right visual field (RVF/LH, Experiment 2), there was no effect of orthographic neighborhood size. We argue that the lack of an effect in Experiment 2 was due to exposure to all of the letters of the words, the words being matched for overall orthographic neighborhood count and the sub-parts no longer having a unique effect. We concluded that the orthographic activation found in Experiment 1 occurred because the initial letters of centrally presented words were projected to the RH. The results support the split fovea theory, where the RH has primacy in representing lead neighbors of a written word.     

Effects of muscle fatigue on the usability of a myoelectric human-computer interface

Electromyography-based human-computer interface development is an active field of research. However, knowledge on the effects of muscle fatigue for specific devices is limited. We have developed a novel myoelectric human-computer interface in which subjects continuously navigate a cursor to targets by manipulating a single surface electromyography (sEMG) signal. Two-dimensional control is achieved through simultaneous adjustments of power in two frequency bands through a series of dynamic low-level muscle contractions. Here, we investigate the potential effects of muscle fatigue during the use of our interface. In the first session, eight subjects completed 300 cursor-to-target trials without breaks; four using a wrist muscle and four using a head muscle. The wrist subjects returned for a second session in which a static fatiguing exercise took place at regular intervals in-between cursor-to-target trials. In the first session we observed no declines in performance as a function of use, even after the long period of use. In the second session, we observed clear changes in cursor trajectories, paired with a target-specific decrease in hit rates.     

Thinking about smoking: A novel approach to describing cognitive style profiles

Cognitive-Experiential Self-Theory (CEST) emphasizes the dual roles of rational and experiential thinking, with individuals having varying preferences for each style. This study explored the relationship between these constructs, illustrating the value of the derived model in addictive behavior, as illustrated by smoking. Data were extracted from a study of the predictors of men’s health behavior. Participants comprised 212 Australian men (aged 25–65 years) who completed a self-report questionnaire which assessed thinking styles and recorded smoking status. Rational and experiential data were subjected to cluster analysis and median splits to identify logical subgroups based on participants’ dual responses. The four derived clusters were more representative of smoking status than groups defined by median splits. In general, both smokers and ex-smokers preferred experiential thinking and non-smokers preferred rational thinking. There was a strong tendency for smokers to report both low rational and high experiential thinking. The use of cluster analysis advanced the evaluation of the interactive nature of rational and experiential thinking by allowing an empirical test of their potential relationship. The thinking profiles reported represent an advance in the assessment of CEST which may provide a useful model for applications in fields both related to, and beyond, addiction.     

Experimenting With the Balancing Hypothesis

The reasons why divided government is on the rise in the United States remain unclear. Of the explanations offered, Fiorina's (1992 ) balancing hypothesis—the idea that voters intentionally cast their ballots in a way that would increase the prospects of split party control—has drawn the most attention. This study gathered empirical evidence to test the hypothesis; its focus was not on whether citizens want divided government, but rather on whether they collectively act in a way consistent with balancing. In September 1900, during the national election campaign, a sample of undergraduates responded to one of five versions of a newspaper article (similar to actual articles about the campaign) that varied with respect to reported polling data on the competitiveness of the congressional and presidential races. The results cast doubt on the merits of the balancing hypothesis.     

Influence of the median opening length on driving behaviors in the crossover work zone—A driving simulation study

Work zone safety has been a major concern for drivers and transportation agencies. Considering the severe consequences of crossover work zone crashes coupled with the limited literature on the median opening length, this paper aims to investigate the influence of the median opening length on driving behaviors from a behavioral perspective in crossover work zones. A driving simulation study with 32 participants was carried out to investigate the driving performance by metrics (speed, acceleration, maximum steering wheel speed, and lane-changing trajectory) with respect to five median opening lengths. The significant differences of each driving performance metric among various median opening lengths were found in the process of crossing through the median opening on the entrance by-pass and exit by-pass. The results indicated that drivers’ speeds were always higher than the speed limits for all median opening lengths. A narrower median opening may induce risky driving behaviors such as sharp deceleration and decelerating while lane-changing, which may increase speed variance. When crossing through the median opening with a larger length, high speed variance, sluggish lane-changing operations, and improper lane-using behaviors were observed because the excessive lane-changing space provided by the larger median opening length would decrease the situation awareness and increase the speed preference heterogeneity among drivers. Finally, some traffic management strategies were proposed, which can improve the safety and mobility of crossover work zones and further provide a basis for the formulation of related standards.     

A risk of confidentiality

The concept of confidentiality is examined from its absolute position espoused by some psychoanalysts to the many exceptions to this position allowed by others. The suggestion made in this paper is offered as a psychoanalytic one which urges us to see confidentiality as posing risks in both positions, that is, the absolute and the necessary exceptions. Confidentiality is representative of many, if not all, of the rules and methods that are implicit in the conduct of an analysis and thus may well be taken for granted. The suggestion offered is for a periodic re-examination of the implicit background of psychoanalysis.     

“操作性定义”和“证伪标准”不足以为心理学奠基

在学科的主流叙事中, “科学性”被视为心理学的基本特征。长久以来, 实证主义的方法论为心理学提供了学科精神内涵。具体而言, “操作性定义”和“证伪标准”成为了心理学“科学性”甚至知识的合法性的判断标准。可心理学的这个方法论基础存在几个方面的问题：首先, 并非所有的科学概念都可以给予操作性定义; 其次, 全称存在命题和统计规律无法经验证实和证伪; 其三, 共有的自然科学方法不足以体现心理学的独特价值。因此, 来自于成熟自然科学的方法论并不足以为作为独立学科的心理学奠基, 心理学背后的本体论承诺对本学科的方法选取有自己特殊的要求, 只有本体论承诺才能为心理学作为独立学科提供逻辑起点。重新反思心理学作为独立学科的逻辑基础, 对于解决学科分裂危机具有建设性意义。     

Destruction and guilt: Splitting and reintegration in the analysis of a traumatised patient

The author traces in detail how, in the analytic relationship, she was slowly able to read aspects of the trauma as 'quotations' and gradually, through transference, transform them into a symbolic language. Split-off aggression and guilt feelings became progressively accessible to interpretation through transferential projective identifi cations. During his analysis, the patient discovered he was the child of Nazi criminals: on his mother's side they were the third generation; on his father's side, the second.     

Graph matching approach and generalized median graph for automatic labeling of cortical sulci with parallel and distributed algorithms

The human brain cortex is very complex structure containing folds (gyri) and fissures (sulci) that were the subject of our study in this paper. The sulcus is one of the most important features in order to know the different functions areas of the brain. The exact identification of sulci on human brain using MRI images is helpful in many studies and applications related to brain diseases and human behavior. Automatic labeling of cortical sulci with all this complexity and inter-subject variability, this is considered non-trivial task. In this paper, we have proposed a new graph based approach of automatic labeling of cortical sulci with parallel and distributed algorithms using graph matching and generalized median graph. The graph matching is very important in many studies and applications such as pattern recognition and classification. The generalized median graph of a set of graphs is a way to represent a set of graphs by a comprehensive graph that minimizes the sum of the distances to all graphs. We have used the characteristics of shape, orientation and location to describe the sulci. The results that we have obtained prove that our approach is accurate and acceptable in this field which uses the graph matching for automatic labeling of cortical sulci.     

Partisan Ambivalence,Split‐Ticket Voting,and Divided Government

Despite recent periods of unified party control of government in Washington, DC, divided government has been the norm in recent decades. Scholars agree that when both presidential and congressional candidates are on the ballot the driving force behind divided government at the national level is split‐ticket voting. In this study, I present a new psychological model of split‐ticket voting. I posit that ticket splitting is motivated by ambivalence over the two major political parties. I test this partisan ambivalence explanation on split‐ticket votes between president and Congress nationally between 1988 and 2004 and voting for state executive offices in Ohio in 1998. I find that partisan ambivalence predicts ticket splitting at both the national and state levels and does so about as well as some other explanations. The results of this study suggest that divided government occurs, in part, because voters are divided within themselves.     

Building bridges between body and mind: The analysis of an adolescent with paralyzing chronic pain

This paper describes the evaluation, initial psychotherapy and subsequent psychoanalysis of an adolescent who presented with a severe psychosomatic process involving total body pain and profound fatigue. The author details the complex and multifaceted nature of the psychosomatic process as it unfolded in the treatment. The psychosomatic problem was not a single entity, but rather was comprised of diverse interwoven elements such as somatization, conversion on pre-oedipal and oedipal levels, conflicts over aggression, sexuality, identity, masochism, secondary gain, anaclitic depression, internalized self-other interactions with a depressed mother and transgenerational transmission of trauma. The author uses the case material to discuss technical approaches to problems that often arise in the analytic treatment of patients with complicated chronic pain and fatigue as the primary complaints. Such approaches include respecting the mind-body split as a primary defense, speaking the language of the body along with the language of the mind and developing the verbal sphere around the non-verbal symptoms. The author emphasizes that complicated chronic pain problems are common and can be helped by psychoanalysis as long as the unique and complex features are understood and reflected in the technical approach.     

Fictions of the internal object

This paper examines internal objects in their role as theoretical constructs which analysts use to make sense of human experience. Object relations theory is based upon a vision that the personality is divided or split into parts. Clinical experience reveals that such splits are commonly expressed in the language of our analysing. However, a lexical reality is not a thing-in-itself, but a way of organizing and understanding experience. Jung's vision of the dynamics of the split self encompass a unique 'object relations theory' that is both similar and yet quite different from the object relations theories of Klein, Fairbairn, Winnicott and Thomas Ogden A clinical example is used to examine the way in which these different theoretical views explain the same clinical phenomenon. The last section of the paper is devoted to a narrational analysis of the place of internal objects in analytic theory. The split self, dynamic is seen as a narrative device - one that makes sense and provides coherence, but is neither the only view of psychic reality nor necessarily an accurate reflection of the nature of the internal world.     

Conscious and unconscious processing of facial expressions: Evidence from two split‐brain patients

We investigated how the brain's hemispheres process explicit and implicit facial expressions in two ‘split‐brain’ patients (one with a complete and one with a partial anterior resection). Photographs of faces expressing positive, negative or neutral emotions were shown either centrally or bilaterally. The task consisted in judging the friendliness of each person in the photographs. Half of the photograph stimuli were ‘hybrid faces’, that is an amalgamation of filtered images which contained emotional information only in the low range of spatial frequency, blended to a neutral expression of the same individual in the rest of the spatial frequencies. The other half of the images contained unfiltered faces. With the hybrid faces the patients and a matched control group were more influenced in their social judgements by the emotional expression of the face shown in the left visual field (LVF). When the expressions were shown explicitly, that is without filtering, the control group and the partially callosotomized patient based their judgement on the face shown in the LVF, whereas the complete split‐brain patient based his ratings mainly on the face presented in the right visual field. We conclude that the processing of implicit emotions does not require the integrity of callosal fibres and can take place within subcortical routes lateralized in the right hemisphere.     

Geometry,landmarks and the cerebral hemispheres: 2D spatial reorientation in split‐brain patients

A right‐hemispheric superiority in spatial encoding based on geometric cues has been largely documented in a variety of species, together with a left‐hemispheric specialization for encoding based on landmarks. In humans, hemispheric asymmetries for spatial encoding have been little explored. In this study, we compared a patient with a complete callosal resection (D.D.C.) and a patient with a wide callosal resection saving the splenium (A.P.), with healthy participants. In two 2D versions of the ‘reorientation task’, participants were asked to find the target corner of a rectangle‐shaped environment, by exploiting either geometric information alone or the combination of geometric and landmark information. In Experiment 1, the landmark consisted of a coloured side of the rectangle; in Experiment 2, this cue was replaced by a coloured disc located inside the rectangle. In both experiments, the rectangular shape ensured the geometric cue. D.D.C. was always unable to recall the target, whereas A.P. correctly solved the task when only the geometric information was available, without difference with respect to the controls. Importantly, the performance of A.P. did not differ from controls’ when the right hemisphere was tested with the landmark cues (the task being carried out using the left hand), whereas when the left hemisphere was tested (right‐hand session) his performance was worse than controls’ with the coloured side of the space, but it was better than controls’ with the coloured disc. The results are discussed comparing them with data collected on other species, and with theories of spatial processing.     

心算的策略选择

从策略选择的角度来研究心算是当前心算研究的一个重要领域。有关心算活动中问题大小效应、距离效应、奇偶效应等的行为与认知神经科学研究揭示了心算活动中不同的策略选择, 进一步加深了我们对心算加工特点的了解。未来研究在注重具体问题解决的同时, 还应注重实验设计的严密性、研究的深入性与综合性相兼顾等问题。     

心算活动中混合策略选择的ERP研究

考察问题大小、距离、奇偶及答案正误对心算策略选择的影响。采用先答案后算式的呈现方式, 记录了15名被试的64导ERP。研究发现, 在小问题中, 错误答案与正确答案相比, 诱发了算术不一致N400, 距离和奇偶因素影响其波峰及潜伏期。在大问题中, 距离和奇偶因素影响晚期正波, 近距离奇偶一致情境诱发了波幅较小的晚期正慢波。表明在混合情境, 距离比奇偶信息优先得到加工; 在小问题心算中距离和奇偶信息影响答案提取, 而在大问题心算中, 对于依靠距离信息较难直接判断的小距离问题, 在进一步的加工中会借助奇偶信息判断是否采用精确计算策略。