Dual-Route and Connectionist Models: A Step Towards a Combined Model

Current models of word recognition are mainly constructed within the frameworks of either dual-route or connectionist theories. The most important test of a word recognition model is how it succeeds in accounting for various reading behaviors. In the present paper dual-route and connectionist word recognition models are briefly described and evaluated. As a further development of these models, a combined framework is proposed. An amalgamation of the two main types of models might give a more satisfactory account of various phenomena within word recognition.     

THE IMPORTANCE OF COLLATIVE-AFFECTIVE AND INTENSIVE AROUSAL POTENTIAL IN STEREO-SCOPICALLY INDUCED PERCEPTUAL CONFLICT

In perceptual conflict of the binocular rivalry type the object field with the greatest collative-affective or intensive arousal potential will dominate. The interaction between these two factors is such that the brighter field will dominate over the fainter whether there is greater or equal collative-affective arousal potential in one of the object fields in relation to the other. Discussion is centered around the question of whether eventual eye dominance can be eliminated through relative changes in the light intensity of the two object fields.     

Hume's Surprise and the Logic of Belief Changes

If the logic of belief changes is extended to cover belief states which contain both factual and normative beliefs, it is easily shown that a change of a factual belief (an 'Is') in a mixed belief state can imply a change of a normative belief (an 'Ought') in the same state. With regard to Hume's so-called 'Is-Ought problem', this means that one has to distinguish its statics from its dynamics. When this is done, it becomes clear that changes of factual beliefs can, for rational reasons, have far-reaching normative consequences. Similarly, a change of a factual belief can imply a change of a value belief. This revised version was published online in June 2006 with corrections to the Cover Date.     

Implicit acquisition of grammars with crossed and nested non-adjacent dependencies: investigating the push-down stack model

A recent hypothesis in empirical brain research on language is that the fundamental difference between animal and human communication systems is captured by the distinction between finite-state and more complex phrase-structure grammars, such as context-free and context-sensitive grammars. However, the relevance of this distinction for the study of language as a neurobiological system has been questioned and it has been suggested that a more relevant and partly analogous distinction is that between non-adjacent and adjacent dependencies. Online memory resources are central to the processing of non-adjacent dependencies as information has to be maintained across intervening material. One proposal is that an external memory device in the form of a limited push-down stack is used to process non-adjacent dependencies. We tested this hypothesis in an artificial grammar learning paradigm where subjects acquired non-adjacent dependencies implicitly. Generally, we found no qualitative differences between the acquisition of non-adjacent dependencies and adjacent dependencies. This suggests that although the acquisition of non-adjacent dependencies requires more exposure to the acquisition material, it utilizes the same mechanisms used for acquiring adjacent dependencies. We challenge the push-down stack model further by testing its processing predictions for nested and crossed multiple non-adjacent dependencies. The push-down stack model is partly supported by the results, and we suggest that stack-like properties are some among many natural properties characterizing the underlying neurophysiological mechanisms that implement the online memory resources used in language and structured sequence processing.     

Scattered Exemplification and Many-Place Copulas

Can there be relational universals? If so, how can they be exemplified? A monadic universal is by definition capable of having a scattered spatiotemporal localization of its different exemplifications, but the problem of relational universals is that one single exemplification seems to have to be scattered in the many places where the relata are. The paper argues that it is possible to bite this bullet, and to accept a hitherto un-discussed kind of exemplification relation called ‘scattered exemplification’. It has no immediate symbolic counterpart in any Indo-European natural language or in any so far constructed logical language. In order to remedy this, a notion called ‘many-place copula’ is introduced, too.     

Residual differences in language processing in compensated dyslexics revealed in simple word reading tasks

Using regional cerebral blood flow as an index of cerebral activity we studied dyslexic and control subjects during simple word reading tasks. The groups were pre-tested for reading skill and the dyslexic group had a lower reading performance but could read and comprehend standard texts. The aim was to elucidate differences in the cerebral activation pattern during reading. The tasks were simple enough that performance differences between the groups could be excluded. We found specific differences between the two groups that were dependent on the language task. When the visual route for language information was used, minor qualitative differences were found between the groups pertaining to the dominant hemisphere. Increasing the complexity of the task by using pseudowords activated the left frontal region more in the dyslexic group than in the control group. A similar effect was seen in a minor region in extrastriate lateral occipital cortex (BA 19). This finding indicates that the dyslexics used areas in these regions that the controls did not. On the other hand, the dyslexics activated less in the right angular gyrus, right dorsolateral prefrontal cortex, and in the right pallidum. Reading skill correlated with the level of activity in the right frontal cortex. We conclude, that cerebral activation pattern elicited by reading is different in dyslexics compared to controls in spite of an almost complete functional compensation.     

Internalism and Accidie

Bernard Williams has famously argued that there are only “internal” reasons for action. Although Williams has produced several, slightly different versions of internalism over the years, one core idea has remained the same: the reasons a person has for acting must be essentially linked to, derived from, or in some other way connected to, that person’s “subjective motivational set”. I have two aims in this paper. First, after having cleared up some initial ambiguities, I try to show that Williams’s internalism admits of two rather different interpretations. Second, I will argue that both these interpretations are inadequate. The first interpretation is incompatible with certain claims that supposedly provide the reasons why we should accept internalism in the first place. The second interpretation faces other problems: given the essential link between reasons and motivation, this interpretation cannot adequately deal with the phenomenon of accidie. Furthermore, those who subscribe to this interpretation of internalism are, on pain of inconsistency, forced to accept an implausible account of reasonable regret.     

Immediacy ‐ subjectivity ‐ revelation

Kierkegaard's fundamental view of life was negative and Gnostic. It was through his interpretation of life that his vision of the nothingness of existence became positive. What formed the material of Kierkegaard's interpretation was the common experience of existence, what ‘all’ men know. His concept of existence has a threefold content : immediacy, subjectivity, and the Christian Revelation. Immediate reality that is not made content of subjectivity becomes empty changeableness, and subjectivity that does not appropriate immediacy deprives itself of the concrete (as with the mystic). Immediacy's ‘text’ first acquires a qualitative transcendent content through the ‘repetition’ of subjective choice. Kierkegaard takes this appropriation of the immediate to be also the self‐development of subjectivity. Consciousness of guilt is an expression of a God‐relationship. Implicated with this consciousness is the consciousness of the nothingness of everything — echoed in man as dread. Yet even when subjectivity is conscious of guilt the truth remains immanent in subjectivity. In the Christian Revelation truth is outside man: subjectivity is untruth (sin).     

Working conditions predicting interpersonal relationship problems at work

Interpersonal relationships have been shown to be an important component of the psychosocial work environment that may affect health, job satisfaction, and productivity. The question whether interpersonal relationships at work are influenced by other psychosocial working conditions such as demands and control has not been studied. The aim of the present study is to investigate if high work demands and aspects of low work control could predict three indicators of detrimental interpersonal relationships at work. In a representative Swedish cohort study, data were obtained in two waves three years apart from 4049 participants, who did not change their jobs between the waves. These data were analysed by multiple logistic regression analyses. Odds ratios adjusted for possible confounders and negative interpersonal relationships at base-line showed that high demands predicted serious conflict and exclusion by co-workers. Low skill discretion predicted exclusion by co-workers. It is argued that these prospective findings are of relevance to interventions targeting troublesome and detrimental interpersonal relationships at work and that the findings can be important in understanding the development of work-related mental ill-health.