Movement Speed and Accuracy in Space and Time: The Complementarity of Error Distributions

Movement speed-accuracy trade-off is a function of the space-time constraints of the task. We investigated the space-time account of Hancock and Newell (1985) and the hypothesis of complementarity between the four moments of the error distribution in space and time. Twelve participants performed 15 conditions in a line drawing task composed of different spatial (10, 20, and 30 cm) and temporal (250 to 2,500 ms) criteria. The results showed that all moments of distributions changed systematically between conditions but there were some departures from the Hancock and Newell predictions. In contrast, individual analysis revealed the complementarity of the spatial and temporal error including a trade-off between the four moments of error. These findings support a complementary space-time account of movement speed and accuracy.     

The Semantics of Time and Space: A Thematic Analysis

Three empirical studies and one analysis of pre-existing data were performed to determine the everyday meanings of time, a major component of phenomenological analyses of human experience. To this end, participants in Studies 1 and 2 sorted time related words into groups having similar meanings, with these groups then evaluated by hierarchical clustering procedures. Results of Studies 1 and 2 produced similar clustering patterns suggesting it was possible to define the everyday meanings of time in terms of experiences of change and continuity, linear organization, tempo, and boundaries. Results of Study 3 indicated little or no effect on clustering patterns of time words when space words also were included in the set of items to be sorted. Concerns about the size and representativeness of the words used as stimuli in Studies 1, 2 and 3 led to an analysis of over 2,000 words falling under the general heading of Time in Roget’s Thesaurus. Results of this analysis revealed that clusters comparable to those obtained in the other three studies also appeared in these data. These results were discussed in terms of their implications for the way in which “invisible” concepts such as time are thought about and used, particularly as related to figurative expression.     

Collapsing Space: Reply to Gentile and Grill

This article is in response to Katie Gentile’s and Hillary Grill’s discussions of my paper “Childless.” Picking up on themes both authors articulate in their commentaries, I advocate for the expansion of space in which a woman can reflect on and locate her voice, desire, and choice in regard to motherhood, childlessness, and reproduction. Incorporating research and anecdotal evidence, I describe how, regardless of whether or not a woman has children, this space can collapse under the weight of personal, historical, and societal pressures.     

The Dimensionality of Visual Space

The empirical study of visual space (VS) has centered on determining its geometry, whether it is a perspective projection, flat or curved, Euclidean or non-Euclidean, whereas the topology of space consists of those properties that remain invariant under stretching but not tearing. For that reason distance is a property not preserved in topological space whereas the property of spatial order is preserved. Specifically the topological properties of dimensionality, orientability, continuity, and connectivity define “real” space as studied by physics and are the spatial properties that characterize the physical universe as being an integral whole. By contrast the geometrical analysis of VS has taken little cognizance of its topology. Instead such properties have been presupposed a priori rather than being established a posteriori by empirical means, perhaps because these properties are self-evident. Applying the method of coordinative definition expounded by Hans Reichenbach for determining geometrical and topological properties of physical space (PS), it can be shown that VS fulfills the topological criteria of being a “real” space sui generis. Though theorized to be produced by the brain, the topology of VS is not topologically equivalent (homeomorphic) with the structure and activity of the brain because, as will be shown, the topology of VS cannot be formed from the topology of the brain without tearing and/or cutting and pasting.     

Pure Time Preference: Reply to Johansson and Rosenqvist

Johansson and Rosenqvist reject our argument for the rational permissibility of pure time preferences (PTP). Johansson and Rosenqvist's main objection is that where two options, X and Y, have equal intrinsic value, there will be a reason to be indifferent between X and Y, and therefore a reason to not hold a PTP for X or Y. In this reply, we argue that if two options have equal intrinsic value, it does not follow that you have a reason to be indifferent. Rather, the two equally large intrinsic values cancel each other out, like two equal weights on kitchen scales.     

The Dynamics of Visual Word Recognition

This article provides an overview of a dynamical systems approach to visual word recognition. In this approach, the dynamics of word recognition are characterized in terms of a connectionist network model. According to this model, seeing a word results in changes in the pattern of activation over the nodes in the lexical network such that, over time, the network moves into an attractor state representing the orthographic, phonological, and semantic properties of that word. At a slower timescale, a learning process modifies the strengths of the connections among the nodes in a way that attunes the network to the statistical regularities in its environment. This view of word identification accommodates a wide body of empirical results, a representative sampling of which is discussed here. Finally, the article closes with a discussion of some of the theoretical issues that should be addressed as the dynamical approach continues to develop.     

Missing the target: A reply to Koehler & Macchi (2009)

Koehler and Macchi 2009 criticize the experiments presented in Newell, Mitchell, and Hayes 2008 as being “virtually irrelevant” to exemplar cuing theory. This reply addresses that interpretation and argues that the experiments dealt with issues at the heart of the theory and provided evidence highly relevant to understand how people think about low‐probability events. The role of the ‘target’ in probabilistic statements is examined, highlighting the need for further theoretical and empirical clarification of the concept. The remaining specific criticisms raised in the commentary are discussed as well. Copyright © 2009 John Wiley & Sons, Ltd.     

视觉加工速度、瞬间信息整合特征与汉语学习困难

采用因素实验设计,通过与正常学生与听力损伤学生对比实验研究,探讨汉语学习困难学生视觉加工速度和视觉瞬间信息整合的特征。结果表明:(1)汉语学习困难学生存在基本视觉加工速度不足以及汉语语言文字视觉加工的特异性困难;(2)汉语学习困难学生需要更长时间整合瞬间视觉信息,从而影响了其加工的速度;(3)适当延长视觉刺激整合的时间,可以有效提高其视觉加工的效率。这些结果对改善学生的汉语学习困难具有一定的指导意义。     

Reparations,Responsibility, and Formalism : A Reply to Carnes

Philosophia - In a recent paper, Thomas Carnes develops a novel argument for reparations for historical injustices. This Reply shows that Carnes succeeds only at the cost of invoking an implausible...     

Creation, Co-operation, and Causality: A Reply to Gregersen

Niels H. Gregersen seeks to illuminate the nature of continuing divine action in the world and to show that the classical theistic doctrine of continuous creation is consonant with some recent scientific theories of self-productive ("autopoietic") systems. Central to these theories is the concept of co-operation; central to Gregersen's theological appropriation of these theories is also the notion of structuring causality developed by philosopher Fred Dretske. While supportive of Gregersen's overall aims and emphases, we find significant disanalogies between co-operation as a theological construct and as an evolutionary strategy. We also doubt the utility of Dretske's notion for his project.     

The Metaphysical Expositions of Space and Time

The direct proof of transcendental idealism, in the Transcendental Aesthetic of Kant's First Critique, has borne the brunt of enormous criticism. Much of this criticism has arisen from a confusion regarding the epistemological nature of the arguments Kant proposes with the alleged ontological conclusions he draws. In this paper I attempt to deflect this species of criticism. I concentrate my analysis on the Metaphysical Expositions of Space and Time. I argue that the argument form of the Metaphysical Expositions is that of disjunctive syllogism and that Kant's primary target of attack is that of Leibnizian relativism. I provide a detailed analysis and reconstruction of the arguments of the Metaphysical Expositions, defending Kant against various claims of argumentative invalidity and incoherence. I conclude by identifying what can properly be inferred regarding the ontological nature of space and time, given my reconstructions of the arguments, and by suggesting the manner in which Kant can deflect objections from the other major proponent of transcendental realism, namely, Newtonian absolutism.