On the role of imagery in linear syllogistic reasoning

Summary The functional role of imagery in linear syllogistic reasoning has not yet been convincingly established. Shortcomings of previous theories and research are discussed. A conceptual analysis of the imagery position leads to the differentiation of modality-specific, analogical-representational, and process perspectives. To obtain evidence relevant to the first and third of these perspectives, a Stroop-type interference paradigm was used in combination with self-paced successive presentation of task components (premises and question of linear syllogisms). Effects of interference information and task components upon response time were consistent with the process reconceptualization of the imagery position.     

Material Dependence and Kant’s Refutation of Idealism

Topoi - The paper argues that in the Critique of Pure Reason Kant develops two anti-sceptical strategies. In the Fourth Paralogism (CPR A) he believes himself able to refute the sceptic by...     

Motor skill learning in the middle-aged: limited development of motor chunks and explicit sequence knowledge

The present study examined whether middle-aged participants, like young adults, learn movement patterns by preparing and executing integrated sequence representations (i.e., motor chunks) that eliminate the need for external guidance of individual movements. Twenty-four middle-aged participants (aged 55–62) practiced two fixed key press sequences, one including three and one including six key presses in the discrete sequence production task. Their performance was compared with that of 24 young adults (aged 18–28). In the middle-aged participants motor chunks as well as explicit sequence knowledge appeared to be less developed than in the young adults. This held especially with respect to the unstructured 6-key sequences in which most middle-aged did not develop independence of the key-specific stimuli and learning seems to have been based on associative learning. These results are in line with the notion that sequence learning involves several mechanisms and that aging affects the relative contribution of these mechanisms.     

Interdisziplin?re Systemintegration und Innovationsgenese: Ein methodologischer Zugang f��r die interdisziplin?re Forschung

The increasing significance of inter- and transdisciplinary research raises the demand for principles with respect to methodology and philosophy of science. The discussion of this question leads to the development of an interdisciplinary research process with two methodic core areas: system integration and inducement of innovation. It will be shown that interdisciplinary research can be understood as a discipline of its own, while its potential of synthesis cannot be declared as a central distinctive feature relative to other disciplines. In fact the developed methodology is firstly aligned analytically, with a focus on the research potential from the area of tension between individual disciplines. This results in an interdisciplinary methodology, generating epistemological progress, which can be applied to complex and cooperation intensive research in academia as well as industry and society.     

Representations underlying skill in the discrete sequence production task: effect of hand used and hand position

Various studies suggest that movement sequences are initially learned predominantly in effector-independent spatial coordinates and only after extended practice in effector-dependent coordinates. The present study examined this notion for the discrete sequence production (DSP) task by manipulating the hand used and the position of the hand relative to the body. During sequence learning in Experiment 1, in which sequences were executed by reacting to key-specific cues, hand position appeared important for execution with the practiced but not with the unpracticed hand. In Experiment 2 entire sequences were executed by reacting to one cue. This produced similar results as in Experiment 1. These experiments support the notion that robustness of sequencing skill is based on several codes, one being a representation that is both effector and position dependent.     

Two components in IOR: evidence for response bias and perceptual processing delays using the SAT methodology

Inhibition of return (IOR) occurs when reaction times (RTs) are slowed to respond to a target that appears at a previously attended location. We used the speed-accuracy trade-off (SAT) procedure to obtain conjoint measures of IOR on sensitivity and processing speed by presenting targets at cued and uncued locations. The results showed that IOR is associated with both delays in processing speed and shifts in response criterion. When the target was briefly presented, the results supported a criterion shift account of IOR. However, when the target was presented until response, the evidence indicated that, in addition to a response bias effect, there was an increase in the minimal time required for information about the target to accumulate above chance level. A hybrid account of IOR is suggested that describes effects on both response bias and perceptual processing.     

Metaphor and the discourse of virology: HIV as human being

Most analysis of the metaphors of AIDS has considered lay rather than scientific discourse. In general, that analysis has uncovered linguistic strategies that tend to distance the disease from people who are healthy. Moreover, it has criticized those strategies insofar as they categorize and dehumanize the AIDS patient. My own analysis, however, focuses on the writing of Robert Gallo, one of the virologists who claimed credit for isolating the HIV as the cause of AIDS. By examining Gallo's popular and scientific writing, I uncover the metaphor system that underlies his work — and perhaps the work of other virologists studying the HIV. I find in Gallo's writing a system of metaphor that personifies and humanizes the HIV (or the HTLV-III as he originally named it). This system differs significantly from lay systems that tend to objectify AIDS. I argue that the metaphor system that underlies Gallo's work is in fact productive, but that it might preclude other ways of conceptualizing the disease and its causes. The co-factor theory, for instance, entails a different metaphoric system entirely. I suggest that AIDS researchers might examine their own language in an effort to critique the metaphors they use and explore the possibility of using new metaphors.     

Hybrid terms and sentences

In the paper we present completeness theorems for hybrid logics, discuss the problem of finite axiomatization and study term rewriting and unification for the variety of distributive lattices and the variety of groups of exponent 2.A financial assistance by the DFG is gratefully acknowledged.