The Divine Action Project, 1988–2003

This article explores the state of the art in theories of special divine action by means of a study of the Divine Action Project (DAP) co-sponsored by the Vatican Observatory and the Center for Theology and the Natural Sciences in Berkeley. The basic aim is to introduce the DAP and to summarize its results, especially as these were compiled in the final “capstone” meeting of the DAP, and drawing on the published output of the project where possible. The subsidiary aim is to evaluate criticisms of theories of special divine action developed within the DAP.     

Classifying homicide offenders and predicting their characteristics from crime scene behavior

A theoretical distinction between instrumental and expressive aggression was used in analyzing offender characteristics and their associations with crime scene actions in Finnish homicides. Twenty-one variables reflecting the offenders' criminal activity, previous relationships with intimates and victims, and general social and psychological adjustment were derived from files of single-offender/single-victim homicides occurring between 1980 and 1994 (n = 502). Additionally, three variables describing post-offense actions and police interview behavior were included. A multidimensional scaling procedure was used to investigate the interrelationships between the variables. A distinction between expressive and instrumental characteristics was observable in the empirical structure, which was divided into three subthemes of Instrumental, Expressive: Blood, and Expressive: Intimate. Associations between the characteristics with five previously identified subthemes of crime scene actions were computed. In addition, the subthemes of crime scene actions were related to post-offense actions and police interview behavior, with Expressive themes being associated with less denial as well as a greater likelihood of surrendering and confession. The practical usefulness for police investigations and theoretical implications of the results are discussed.     

Natural law and history in Locke's theory of distributive justice

According to the tradition of natural law justice is inherent to, and should always be observed in, all interpersonal relations: the science of natural law is nothing more or less than the expression of such principles of justice. The theoretical peculiarities that crop up regarding the lawfulness of appropriation are determined by the indirect interpersonal relations that take place within the process of appropriation: though appropriation is an action directed not towards another person or his property, but towards tangible external goods, this action may have important consequences for other people. Therefore Locke's theory of appropriation is a theory of justice.Locke's solution is made possible by the methodological improvement which allows a clear separation between the natural law and the historical and empirical conditions of its application: this improvement is a consequence of the distinction between modes and substances established in Locke's Essay.Locke's theory can be considered an extensive re-elaboration, in polemic against Filmer, of the anti-monopolistic principle characteristic of the whole of Scholastic social thought: this principle is intimately connected with the principle of man's natural liberty.Locke maintains a negative and formal conception of justice: justice prohibits interference with others' liberty of appropriation. Alongside the justice is the positive and conditional obligation of charity which prescribes the transfer of some of one's own goods to others who need them in order to survive. But for Locke there are precise limits on the obligation of charity: the application of charity suspends the application of justice only when the immediate physical survival is at stake; in all other cases justice leaves no room for charity.The Lockian negative conception of justice, which allows unlimited liberty of appropriation, is dependent on the empirical and historical condition of the incommensurability of the main resource. The widespread use of money acts as an accelerating element in the process of exhaustion of the incommensurability of land-resources but, at the same time, it renders self-preservation and appropriation almost completely independent of the natural environment. Money creates an infinite number of opportunities for the outlay of labour irrespective of the availability of land, that is, it renders labour the principal resource of the civilized world, and labour is an incommensurable and infinitely reproducible resource. The incommensurability of the labour resource thus supports the Lockian theory of negative distributive justice; but over the Lockian solution already loomed the threatening shadow of pauperism.The subject of this essay is further dealt with in my book on Locke's political and social philosophy Nel crepuscolo della probabilitá, Bibliopolis, Napoli, 1983. There I develop further the interpretation of Locke's theory of justice presented here and analyse his theoretical and historical presuppositions.     

Ultrafast scene detection and recognition with limited visual information

Humans can detect target colour pictures of scenes depicting concepts like picnic or harbour in sequences of six or 12 pictures presented as briefly as 13?ms, even when the target is named after the sequence. Such rapid detection suggests that feedforward processing alone enabled detection without recurrent cortical feedback. There is debate about whether coarse, global, low spatial frequencies (LSFs) provide predictive information to high cortical levels through the rapid magnocellular (M) projection of the visual path, enabling top-down prediction of possible object identities. To test the “Fast M” hypothesis, we compared detection of a named target across five stimulus conditions: unaltered colour, blurred colour, greyscale, thresholded monochrome, and LSF pictures. The pictures were presented for 13–80?ms in six-picture rapid serial visual presentation (RSVP) sequences. Blurred, monochrome, and LSF pictures were detected less accurately than normal colour or greyscale pictures. When the target was named before the sequence, all picture types except LSF resulted in above-chance detection at all durations. Crucially, when the name was given only after the sequence, performance dropped and the monochrome and LSF pictures (but not the blurred pictures) were at or near chance. Thus, without advance information, monochrome and LSF pictures were rarely understood. The results offer only limited support for the Fast M hypothesis, suggesting instead that feedforward processing is able to activate conceptual representations without complementary reentrant processing.     

The enduring scandal of deduction

Deductive inference is usually regarded as being “tautological” or “analytical”: the information conveyed by the conclusion is contained in the information conveyed by the premises. This idea, however, clashes with the undecidability of first-order logic and with the (likely) intractability of Boolean logic. In this article, we address the problem both from the semantic and the proof-theoretical point of view. We propose a hierarchy of propositional logics that are all tractable (i.e. decidable in polynomial time), although by means of growing computational resources, and converge towards classical propositional logic. The underlying claim is that this hierarchy can be used to represent increasing levels of “depth” or “informativeness” of Boolean reasoning. Special attention is paid to the most basic logic in this hierarchy, the pure “intelim logic”, which satisfies all the requirements of a natural deduction system (allowing both introduction and elimination rules for each logical operator) while admitting of a feasible (quadratic) decision procedure. We argue that this logic is “analytic” in a particularly strict sense, in that it rules out any use of “virtual information”, which is chiefly responsible for the combinatorial explosion of standard classical systems. As a result, analyticity and tractability are reconciled and growing degrees of computational complexity are associated with the depth at which the use of virtual information is allowed.     

The Role of Natural Class Features in the Acquisition of Phonotactic Regularities

Previous research has shown that phonotactic regularities can be acquired through recent production or auditory experience (e.g., Dell et  al., Journal of Experimental Psychology: Learning, Memory, and Cognition, 26(6), 1355–1367, 2000; Onishi et al., Cognition, 83(1), B13–B23, 2002). However, little is known about the role of phonological natural classes in this learning process. This study addressed this question by investigating the acquisition of a contingency relationship between onsets and medial glides by Mandarin speakers. The experiments involved the manipulation of three types of phonotactic regularities. In the Laryngeal version, onsets that preceded the same glide shared a voicing feature. In the Place version, onsets that preceded same glide shared a place feature. In the Neither version, onsets associated with the same glide shared neither a voicing feature nor a place feature. Results showed the Place version and the Laryngeal version were more easily acquired than the Neither version in terms of the amount of exposure needed to acquire the experimentally manipulated phonotactic schema and the sustainability of the acquired schema. The results suggest that the statistical learning mechanism that guides our processing of speech input prefers phonological regularities that follow certain natural class features. This preference may account for the way natural languages are structured phonologically. An erratum to this article can be found at     

Regarding Scenes

ABSTRACT— When we view the visual world, our eyes flit from one location to another about three times each second. These frequent changes in gaze direction result from very fast saccadic eye movements. Useful visual information is acquired only during fixations, periods of relative gaze stability. Gaze control is defined as the process of directing fixation through a scene in real time in the service of ongoing perceptual, cognitive, and behavioral activity. This article discusses current approaches and new empirical findings that are allowing investigators to unravel how human gaze control operates during active real-world scene perception.     

Serial homicide: an investigation of behavioural consistency

To examine if serial homicide offenders are consistent across their crimes, a model was developed empirically that could be used to distinguish between crimes that were instrumental and those that were expressive. The first known three offences in each series of 69 US serial homicides committed by 23 offenders, were examined and the instrumental and expressive themes determined. Three models were then explored that test for consistency across these themes. The most liberal model was found to classify all of the offences effectively and to reveal complete consistency across the three crimes for all offenders. The implications of these results for offender profiling and further study of serial homicide are discussed. Copyright © 2005 John Wiley & Sons, Ltd.     

A contribution to the development of a psychoanalytical methodology for research into language: A systematic study of narration as an expression of sexuality

Systematic research on language has a solid starting point in Freudian hypotheses on sexuality. This theory is the semantic ground for categorising narrations and providing a basis for the research method. The author places his research in the frame of the systematisation of the Freudian theory of substitute formations in the preconscious. He affirms that these formations are influenced in a particular way by each variant of sexuality. The author proposes an inventory (in Freudian terms) of those variants of sexuality, and he affirms that they can be detected in the discourse. Five universal scenes having the status of a canon, with specific features for each of the ways in which sexuality is manifested, make up narrations. The author describes the features of each narration and provides some examples. He also examines problems related to the use of the method (the coexistence of different variants of sexuality in a single fragment of a narration and the successive steps in the use of the method). The author briefly considers some other problems: the analysis of defences, the study of words and theoretical research. Finally, he examines the validity and reliability of the method.