Learning from the existence of models: On psychic machines,tortoises, and computer simulations

Using four examples of models and computer simulations from the history of psychology, I discuss some of the methodological aspects involved in their construction and use, and I illustrate how the existence of a model can demonstrate the viability of a hypothesis that had previously been deemed impossible on a priori grounds. This shows a new way in which scientists can learn from models that extends the analysis of Morgan (1999), who has identified the construction and manipulation of models as those phases in which learning from models takes place.     

Paul Feyerabend und Thomas Kuhn

The paper discusses some aspects of the relationship between Feyerabend and Kuhn. First, some biographical remarks concerning their connections are made. Second, four characteristics of Feyerabend and Kuhn's concept of incommensurability are discussed. Third, Feyerabend's general criticism of Kuhn's Structure of Scientific Revolutions is reconstructed. Forth and more specifically, Feyerabend's criticism of Kuhn's evaluation of normal science is critically investigated. Finally, Feyerabend's re-evaluation of Kuhn's philosophy towards the end of his life is presented. This revised version was published online in August 2006 with corrections to the Cover Date.     

Perelman’s Pseudo-Argument as Applied to the Creationism Controversy

If you want to challenge or at least weaken the adhesion to a system of values, you can basically adopt two radically opposed rhetorical strategies. Either you will attack the system in a frontal way: for instance, fundamentalists or fascists deny any validity to democratic values and human rights. Or you will pretend to argue from within the system (by saying that you accept some of its basic premises), while subtly distorting the process of reasoning in order to get to your conclusions. If the audience is naïve or poorly informed, you will be able to defend positions that are fundamentally at odds with liberal-democratic values while seeming to argue from inside the system. I would like to show how such a process of “perverse” translation works in the context of the Darwinism/Creationism “controversy”. The attacks on the teaching of evolutionary biology began approximately one century ago. The way Creationists have argued and changed several times their rhetorical strategies seems very interesting to me, in that it exemplifies an important contemporary phenomenon, which I call “perverse translation” or “the wolf in the sheepfold”.     

Emerging Infectious Diseases: Coping with Uncertainty

The world’s scientific community must be in a state of constant readiness to address the threat posed by newly emerging infectious diseases. Whether the disease in question is SARS in humans or BSE in animals, scientists must be able to put into action various disease containment measures when everything from the causative pathogen to route(s) of transmission is essentially uncertain. A robust epistemic framework, which will inform decision-making, is required under such conditions of uncertainty. I will argue that this framework should have reasoning at its center and, specifically, that forms of reasoning beyond deduction and induction should be countenanced by scientists who are confronted with emerging infectious diseases. In previous articles, I have presented a case for treating certain so-called traditional informal fallacies as rationally acceptable forms of argument that can facilitate scientific inquiry when little is known about an emerging disease. In this article, I want to extend that analysis by highlighting the unique features of these arguments that makes them specially adapted to cope with conditions of uncertainty. Of course, such a view of the informal fallacies must at least be consistent with the reasoning practices of scientists, and particularly those scientists (viz. epidemiologists) whose task it is to track and respond to newly emerging infectious diseases. To this end, I draw upon examples of scientific reasoning from the UK’s BSE crisis, a crisis that posed a significant threat to both human and animal health.

AIDS-related stigma,personal risks and career objectives among makerere medical students

The aims of this study were to investigate variables that influence AIDS-related stigma and to assess occupational risks, behavioural change, and career objectives of students in face of the AIDS epidemic. Data available on 150 randomly selected medical students were analysed statistically. Results indicated that sex and year of study significantly influenced AIDS-related stigma while age, religion and tribe did not. The majority of students recommended screening and health education for high-risk people and reported high levels of perceived risk. Various occupational hazards and behavioural changes were reported, but students still wanted to remain in the medical profession. Implications of these findings are discussed.     

Making psychology incorruptible

This paper is a response to criticisms, by Peterson (1995) and others, of positions I took in an earlier article, “Manifesto for a science of clinical psychology” (McFall, 1991). I had argued that professional practice and training in clinical psychology must be governed by a scientific epistemology, and had outlined some of the specific reasons and implications. In this article, I attempt to correct misinterpretations of my previous arguments, to clarify ambiguities, and to fill any serious omissions. The fundamental points of the original Manifesto are defended, buttressed, and extended. In response to issues highlighted by the criticisms, two new corollaries are added to those offered in the original article. These summarize the arguments presented in this paper, with special emphasis on the essential role of skepticism as the best protection against the corruption of knowledge and practice in psychology.     

After Lakatos

The work of the philosopher of science Imre Lakatos has been highly influential upon scholars of science and religion, especially persons who want to demonstrate how theological inquiry may meet the intellectual standards of science. I first argue against Lakatos' position, showing how it fails to meet its own ambitions of providing clear and public criteria for assessing scientific theories. I then argue that the same weaknesses will manifest themselves in the work of his followers, using Nancey Murphy's early work as an example. I conclude by affirming Murphy's recent shift towards Alasdair MacIntyre's theory of rationality.     

Recent Debates Over Structural Realism

Summary  In recent years Structural Realism has been revived as a compromise candidate to resolve the long-standing question of scientific realism. Recent debate over structural realism originates with Worrall’s (1989) paper “Structural Realism: The best of Both Worlds”. However, critics such as Psillos contend that structural realism incorporates an untenable distinction between structure and nature, and is therefore unworkable. In this paper I consider three versions of structural realism that purport to avoid such criticism. The first is Chakravartty’s “semirealism” which proceeds by trying to show that structural realism and entity realism entail one another. I demonstrate that this position will not work, but follow Chakravartty’s contention that structural realism need not imply that scientific knowledge can only be of mathematical structure. I advance from this conclusion to sketch a version of structural realism that is consistent with recent deflationary approaches to the scientific realism question. Finally, I consider a third approach to structural realism Ladyman’s “metaphysical structural realism” which tries to avoid the difficulties of earlier versions by taking structure to be ontologically primary. I show that the deflationary approach to structural realism undermines the rationale behind Ladyman’s approach.     

Psychometric properties of the Chinese Self-Directed Search (1994 edition)

In this study, we (a) examined the measurement equivalence/invariance (ME/I) of the Chinese Self-Directed Search (SDS; 1994 edition) across gender and geographic regions (Mainland China vs. Hong Kong); (b) assessed the construct validity of the Chinese SDS using [Widaman, 1985] and [Widaman, 1992] MTMM framework; and (c) determined whether vocational interests are measured equivalently by Chinese SDS subtests. Confirmatory factor analyses suggested that males and females from Mainland China and Hong Kong interpreted the instrument in conceptually similar manner. Also, the Chinese SDS demonstrated sound construct validity. However, we found that like-named interests were not measured equivalently by the SDS subtests.