Grasping movement plans

Despite the great amount of research that has been done regarding the time it takes to move the hand to targets of varying distances and widths, it is unclear whether target distance and width are both represented in movement plans prior to movement initiation. We addressed this question by studying performance in an object manipulation task. Our participants reached out and took hold of a familiar object (a bathroom plunger) to move it to wide or narrow targets of varying heights. Grasp heights on the plunger were additively affected by target height and target width, suggesting that both factors were taken into account by participants prior to moving the plunger from its initial position. Another factor we manipulated was the width of the base from which the plunger was lifted on its way to its next position. This factor also affected grasp heights, but no more so than target widths. The latter result contradicts the view that movement starts are planned in more detail than movement ends, as might be expected from the fact that movement starts come sooner. Together, our results suggest that forthcoming movements are planned in considerable detail. A surprising methodological implication of this study is that recording how people prepare to move can reveal as much—or in some cases more—about what they have planned than can recording their subsequent movements.     

Toward a Lutheran Response to Christian Zionism1

Abstract : The following article discusses the Christian Zionist movement, and emphasizes the danger it poses to facilitating peace in the Middle East. The author argues that it is a political movement built on a particular theological system, that of premillenial dispensationalism. This particular system also is discussed in detail, including its origins and its contemporary manifestations. The article concludes with some suggestions for how a Lutheran theological perspective might constructively engage Christian Zionism in the service of promoting a vision of hope for the future.     

The Civil Rights Movement as Theological Drama—Interpretation and Application

In this essay, Charles Marsh sketches a theological interpretation of the American civil rights movement. Marsh argues that interpretation must begin by reconsidering the theological legacy of Martin Luther King, Jr., taking into account his deep, though largely overlooked, confessional convictions as well as his sympathy with the theology of Karl Barth, whose influence on King has been ignored. Marsh further argues that a theological interpretation of the civil rights movement should not be a matter of writing religious genealogies of moral actions, of civic piety or of representations of human goodness, but of understanding the detail of theological convictions in their lives particularity. Marsh thinks it is altogether appropriate for theologians to retell the story of the American civil rights movement as the story of the church.     

Movement as an emergent form: Its structural limits

The purpose of this paper is to view the structure of goal-directed movement as an emergent property of a system interacting with its surround. Principles of the genesis of form are presented and arguments offered to extend these concepts to the analysis of human movement. Movement is viewed as a dynamic form having structural limits which define its functionality or its potential in solving a particular motor problem.The morphology of the system, and its experience with external objects and the field of external forces are considered to be the primary factors determining the emerging form of a movement. These interacting factors and their influence on the structural limits of a movement are discussed in detail. While the degree of effectiveness may vary, it is suggested that the structure of the movement tends towards efficiency and represents the current problem-solving capacity of the individual at any one point in time. Coordination of a system is thus viewed as a reflection of the individual's ability to integrate its internal states and processes with external demands.Lastly, goal-directedness, as a characteristic of living systems, is believed to provide the basis for defining the morphological, biomechanical and environmental constraints which are relevant to the task. The role of the task and the intentionality of the system in its goal-directedness and organization of movement is explored.The framework for viewing movement offered in this paper is enhanced by philosophical arguments and supported by evidence from the arts and the physical, biological and behavioral sciences. It is intended to encourage the reader to re-examine ideas, reflect on movement in a unique way and to generate questions regarding the underlying mechanisms and synergies supporting the emergence of movement in compliance with the factors that constrain it.     

Pentecostalism: Conversion and Charismata

The development of the Pentecostal movement is surveyed in both Western and European settings. Forms of transcendent communication and their im- pact on conversion are considered. The most unique form of religious charis- mata, speaking in tongues, is discussed in detail. Questions about the phonetic properties in glossolalia are considered. Issues of social-role taking, prophetic meaning, and healing are likewise discussed.     

For efficient navigational search, humans require full physical movement, but not a rich visual scene

During navigation, humans combine visual information from their surroundings with body-based information from the translational and rotational components of their movement. Theories of navigation focus on the role of visual and rotational body-based information, even though experimental evidence shows they are not sufficient for complex spatial tasks. To investigate the contribution of all three sources of information, we asked participants to search a computer-generated virtual room for targets. Participants were provided with only visual information or with visual information supplemented with body-based information for all movement (walk group) or rotational movement (rotate group). The walk group performed the task with near-perfect efficiency, irrespective of whether a rich or impoverished visual scene was provided. The visual-only and rotate groups were significantly less efficient and frequently searched parts of the room at least twice. These results suggest that full physical movement plays a critical role in navigational search, but only moderate visual detail is required.     

Determining the influence of Gaussian blurring on inversion effects with talking faces

Perception of visual speech and the influence of visual speech on auditory speech perception is affected by the orientation of a talker's face, but the nature of the visual information underlying this effect has yet to be established. Here, we examine the contributions of visually coarse (configural) and fine (featural) facial movement information to inversion effects in the perception of visual and audiovisual speech. We describe two experiments in which we disrupted perception of fine facial detail by decreasing spatial frequency (blurring) and disrupted perception of coarse configural information by facial inversion. For normal, unblurred talking faces, facial inversion had no influence on visual speech identification or on the effects of congruent or incongruent visual speech movements on perception of auditory speech. However, for blurred faces, facial inversion reduced identification of unimodal visual speech and effects of visual speech on perception of congruent and incongruent auditory speech. These effects were more pronounced for words whose appearance may be defined by fine featural detail. Implications for the nature of inversion effects in visual and audiovisual speech are discussed.     

Observation and analysis of large-scale human motion

Many team sports include complex human movement, which can be observed at different levels of detail. Some aspects of the athlete's motion can be studied in detail using commercially available high-speed, high-accuracy biomechanical measurement systems. However, due to their limitations, these devices are not appropriate for studying large-scale motion during a game (for example, the motion of a player running across the entire playing field). We describe an alternative approach to studying such large-scale motion, and present a video-based, computer-aided system, developed specifically for the purpose of acquiring large-scale motion data. The baseline of our approach consists of sacrificing much of the spatial accuracy and temporal resolution of widely used biomechanical measurement systems, to obtain data on human movement that span large areas and long intervals of time. Data can be obtained for each of the observed athletes with reasonable amount of operator work. The system was developed using the recordings of a handball match. Several field tests were performed to assess measurement error, including comparison to one of the widely available biomechanical measurement systems. With the help of the system presented, we could obtain position data for all 14 handball players on a 40 x 20 m large court with RMS error better than 0.6 m, covering 1 h of action. Several results, obtained during the handball match study are presented, in order to highlight the importance of large-scale motion acquisition.     

The selective disruption of spatial working memory by eye movements

In the late 1970s/early 1980s, Baddeley and colleagues conducted a series of experiments investigating the role of eye movements in visual working memory. Although only described briefly in a book (Baddeley, 1986), these studies have influenced a remarkable number of empirical and theoretical developments in fields ranging from experimental psychology to human neuropsychology to nonhuman primate electrophysiology. This paper presents, in full detail, three critical studies from this series, together with a recently performed study that includes a level of eye movement measurement and control that was not available for the older studies. Together, the results demonstrate several facts about the sensitivity of visuospatial working memory to eye movements. First, it is eye movement control, not movement per se, that produces the disruptive effects. Second, these effects are limited to working memory for locations and do not generalize to visual working memory for shapes. Third, they can be isolated to the storage/maintenance components of working memory (e.g., to the delay period of the delayed-recognition task). These facts have important implications for models of visual working memory.     

The measurement of imagery ability

When variations in imagery ability are used to predict task performance, distinct and consistent relationships do not tend to emerge. A selective review of studies is undertaken to outline some basic reasons why individual difference measures of imagery are often so unsuccessful. Relevant studies concerning the learning and performance of motor skills are examined in some detail. It is concluded that the major problem in these studies is the types of imagery tests that have been employed; these tests have not adequately measured imagery ability. A recently developed instrument, the Movement Imagery Questionnaire, which has been designed to assess individual differences in visual and kinesthetic imagery of movement is discussed.     

SubsMatch 2.0: Scanpath comparison and classification based on subsequence frequencies

Our eye movements are driven by a continuous trade-off between the need for detailed examination of objects of interest and the necessity to keep an overview of our surrounding. In consequence, behavioral patterns that are characteristic for our actions and their planning are typically manifested in the way we move our eyes to interact with our environment. Identifying such patterns from individual eye movement measurements is however highly challenging. In this work, we tackle the challenge of quantifying the influence of experimental factors on eye movement sequences. We introduce an algorithm for extracting sequence-sensitive features from eye movements and for the classification of eye movements based on the frequencies of small subsequences. Our approach is evaluated against the state-of-the art on a novel and a very rich collection of eye movements data derived from four experimental settings, from static viewing tasks to highly dynamic outdoor settings. Our results show that the proposed method is able to classify eye movement sequences over a variety of experimental designs. The choice of parameters is discussed in detail with special focus on highlighting different aspects of general scanpath shape. Algorithms and evaluation data are available at: http://www.ti.uni-tuebingen.de/scanpathcomparison.html.     

The World Council of Churches’ Relationships with Pentecostalism: A Brief Historical Survey and Some Recent Perspectives on Membership Matters

This article approaches the problematic of relationships between the World Council of Churches (WCC) and Pentecostalism, mainly from the perspective of membership of Pentecostal churches in the WCC. It contents a brief presentation of some prejudices regarding Pentecostals in the ecumenical movement and a historical survey of the relationships between the WCC and Pentecostals, as well as a more detailed analysis of the actual status of this relationship from the perspective of membership of Pentecostal churches in the WCC. The last section assesses possible future scenarios in this regard. It is underlined that the Pentecostal movement is already represented in the WCC by a few small Pentecostal churches and that all the debate on whether to accept new Pentecostal member churches in this ecumenical organization should have as its starting point the reality that Pentecostalism is already part of the WCC. After presenting in detail the last debate in the Permanent Committee on Consensus and Collaboration (PCCC) on the issue of the WCC opening the doors to Pentecostal churches, this article concludes that the WCC should follow its previous policy of analyzing individually each application for membership according to its criteria for accepting new members. While most Pentecostal churches would agree with the basis of the WCC and some might increase their ecumenical engagement at all levels, in the near future at least, Pentecostal churches may still have a long way to go to integrate themselves in a genuine ethos and desire for unity.     

Dancers Exult at the Awakening

Abstract. This article explores the art form of dance as a metaphor for the teaching of theology. Employing the work of Maria Harris, the author contends that there are seven elements of dance than can serve as metaphors for teachers of theology: preparation, rhythm, movement, expectancy, response, embodiment, and performance. Each dance element is described in detail, and the correlations between specific elements of dance and how one might teach theology are presented as possible methodological steps for teaching.     

The diplomatic career of Mircea Eliade: A response to Adriana Berger

Adriana Berger has attacked Mircea Eliade's connection with the Romanian right-wing movement, the Iron Guard, or Legion of the Archangel Michael. Her article ‘Fascism and religion in Romania’, makes much of certain British Foreign Office documents which I have inspected in detail. Not only do these documents fail to corroborate Berger's conclusions but they cast real doubt on Berger's critical detachment. Her claim that Eliade was detained in England because of his political activities on behalf of the Iron Guard, and also of Nazi Germany, is without foundation. Other insinuations which she has made about Eliade's political motivations are subject to alternative interpretations. Eliade undoubtedly was vehemently nationalist in his youth and gave some support to the Legion of the Archangel Michael. However, we must constantly guard against permitting our pre-existent judgements of nationalism and fascism to dictate our reading of historical event. Even if justified, prejudice is still prejudice and is not acceptable scholarship.     

Contrast and complementarity: Two approaches to the thought of Joseph Ratzinger

Abstract

With their emphasis on healing, Zionist churches in southern Africa currently represent by far the largest group among the so-called African Independent or Indigenous Churches (AICs) and, as such, a type of church in their own right. They reflect, in short, an indigenous response to the challenges of modernity, as experienced in their respective socio-political, religious, and cultural settings. After sketching the history of their origin, which is linked to J. A. Dowie as well as to the Keswick movement, and describing the worship and congregational life ‘in Zion' in some detail, the article concludes with a theological reflection about the lived ecclesiology and pneumatology of these churches, which deeply challenge the very perception of established Christian theologies. The aim is to stimulate serious dialogue, which, as the author is convinced, will lead to an authentic re-owning of the Christian tradition by all the Church.     

Partial establishment – Menachem Begin,Gahal and the Black Panthers

This paper aims to shed further light on the response of Israeli society to the rise of the Black Panthers in 1971 by examining the attitude adopted by Menachem Begin and Gahal to the emerging Mizrahi protest movement. After discussing in detail Begin’s response to the Black Panthers’ protest, this paper analyses the factors that contributed to the divide between the Panthers and Israel’s leading opposition party at that time, and the criticism levelled by party members against its leadership concerning its inaction regarding the Black Panthers’ protest. Whereas right-wing Zionist research has hitherto focused on Begin’s political and security-related outlook and activities, the affair being discussed may shift the limelight onto the socio-economic attitudes of Begin and his party.     

The need to reform our assessment of evidence from clinical trials: A commentary

The ideology of evidence-base medicine (EBM) has dramatically altered the way we think, conceptualize, philosophize and practice medicine. One of its major pillars is the appraisal and classification of evidence. Although important and beneficial, this process currently lacks detail and is in need of reform. In particular, it largely focuses on three key dimensions (design, [type I] alpha error and beta [type II] error) to grade the quality of evidence and often omits other crucial aspects of evidence such as biological plausibility, reproducibility, generalizability, temporality, consistency and coherence. It also over-values the randomized trial and meta-analytical techniques, discounts the biasing effect of single centre execution and gives insufficient weight to large and detailed observational studies. Unless these aspects are progressively included into systems for grading, evaluating and classifying evidence and duly empirically assessed (according to the EBM paradigm), the EBM process and movement will remain open to criticism of being more evidence-biased than evidence-based.     

The utilization of visual information in the control of rapid sequential aiming movements.

Two experiments were conducted to examine the role of vision in the execution of a movement sequence. Experiment 1 investigated whether individual components of a sequential movement are controlled together or separately. Participants executed a rapid aiming movement to two targets in sequence. A full vision condition was compared to a condition in which vision was eliminated while in contact with the first target. The size of the first target was constant, while the second target size was varied. Target size had an influence on movement time and peak velocity to the first target. Vision condition and target size did not affect the time spent on the first target. These results suggest that preparation of the second movement is completed before the first movement is terminated. Experiment 2 examined when this preparation occurred. A full vision condition was compared to a condition in which vision was occluded during the flight phase of the first movement. Movement initiation times were shorter when vision was continually available. Total movement time was reduced with vision in two-target condition, but not in a control one-target condition. The time spent on the first target was greater when vision was not available during the first movement component. The results indicate that vision prior to movement onset can be used to formulate a movement plan to both targets in the sequence [Fischman & Reeve (1992).