Children's understanding of the arithmetic concepts of inversion and associativity

Previous studies have shown that even preschoolers can solve inversion problems of the form a+b-b by using the knowledge that addition and subtraction are inverse operations. In this study, a new type of inversion problem of the form d x e/e was also examined. Grade 6 and 8 students solved inversion problems of both types as well as standard problems of the form a+b-c and d x e/f. Students in both grades used the inversion concept on both types of inversion problems, although older students used inversion more frequently and inversion was used most frequently on the addition/subtraction problems. No transfer effects were found from one type of inversion problem to the other. Students who used the concept of associativity on the addition/subtraction standard problems (e.g., a+b-c=[b-c]+a) were more likely to use the concept of inversion on the inversion problems, although overall implementation of the associativity concept was infrequent. The findings suggest that further study of inversion and associativity is important for understanding conceptual development in arithmetic.     

Redintegration and the benefits of long-term knowledge in verbal short-term memory: an evaluation of Schweickert's (1993) multinomial processing tree model

The impact of four long-term knowledge variables on serial recall accuracy was investigated. Serial recall was tested for high and low frequency words and high and low phonotactic frequency nonwords in 2 groups: monolingual English speakers and French-English bilinguals. For both groups the recall advantage for words over nonwords reflected more fully correct recalls with fewer recall attempts that consisted of fragments of the target memory items (one or two of the three target phonemes recalled correctly); completely incorrect recalls were equivalent for the 2 list types. However, word frequency (for both groups), nonword phonotactic frequency (for the monolingual group), and language familiarity all influenced the proportions of completely incorrect recalls that were made. These results are not consistent with the view that long-term knowledge influences on immediate recall accuracy can be exclusively attributed to a redintegration process of the type specified in multinomial processing tree model of immediate recall. The finding of a differential influence on completely incorrect recalls of these four long-term knowledge variables suggests instead that the beneficial effects of long-term knowledge on short-term recall accuracy are mediated by more than one mechanism.     

Giving Science a Bad Name: Politically and Commercially Motivated Fallacies in BSE Inquiry

It is a feature of scientific inquiry that it proceeds alongside a multitude of non-scientific interests. This statement is as true of the scientific inquiries of previous centuries, many of which brought scientists into conflict with institutionalised religious thinking, as it is true of the scientific inquiries of today, which are conducted increasingly within commercial and political contexts. However, while the fact of the coexistence of scientific and non-scientific interests has changed little over time, what has changed with time is the effect of this coexistence on scientific inquiry itself. While scientists may no longer construct their theories with various religious dictates in mind, growing commercial and political interests in science have served to distort the interpretation of science. Using the U.K.’s recent crisis with bovine spongiform encephalopathy (BSE) as my context, I examine two ways in which this distortion has occurred – the interpretation of the science of BSE by politicians and by commercial parties for the purposes of justifying policy decisions and informing the public of risk, respectively. Fallacious reasoning, I contend, is the manifestation of this distortion in these contexts. In demonstration of this claim, I examine how politicians and commercial parties alike have employed two fallacies in their assessments of the science of BSE. These fallacies extend in novel ways the set of so-called traditional informal fallacies. The interpretation of science, I conclude, is a rich context in which to conduct a study of fallacious reasoning; moreover, such a study can contribute in significant ways, I argue, to the public understanding of science.     

Selflessness &; Cognition

What are the cognitive mechanisms that underlie selfless conduct, both ‘thinking’ and unthinking? We first consider deliberate selflessness, a manner of selecting acts in which, in evaluating options, one expressly chooses not to weigh the potential consequences for oneself (though this formulation is seen as needing some qualification). We then turn to unthinking behavior in general, and whether we are responsible for it, as the foundation for analyzing the unthinking variety of selflessness. Using illustrative cases (Grenade Gallantry, The Well-Meaning Miner, Ignorant Ilya, Self-Disregarding Sally) we explore just what is involved in setting aside one's self-interests unthinkingly. Eventually, this account links up with work on mental compartmentalization, as it becomes apparent that unthinking selflessness encompasses both unthinking behavior (calling upon inexplicit cognitive utilization of stored images) that is selfless, and thinking behavior (calling upon reasoning with sentences) that is unthinkingly selfless (by virtue of an unreasoned, automatic shift of cognitive standpoint to a ‘compartment’ that omits information about one's self-interests). The analysis points toward a practical program for generating increased selflessness in ourselves and others.     

Just How Correct is Political Correctness? A Critique of the Opposition's Arguments

I begin by examining three factors which enable the term political correctness (hereafter PC) itself to feed into the hands of its opponents: namely, the trivialization of the actual issues which are attributed to PC, the villainization of those involved in the PC movement, and the conferring of a sense of legitimacy on the opposition movement.The bulk of the paper provides a detailed summary and critique of every single articulated Canadian position I encountered against such PC measures as fair language policies. I have distinguished between arguments directed at the ideological content and the methodology of PC. Arguments directed at the ideological content are divided into the threat to freedom of expression argument, the threat to academic freedom argument, and the degeneration into triviality argument; arguments directed at the methdology are divided into the argument that PC commits the very evils that it addresses and the argument that PC uses unjust means to get its way.The paper ends by claiming that if PC means minimizing sexual and racial harrassment, discourgaing homophobic, racist, and sexist discourse within educational settings, and curtailing policies which victimize oppressed groups, then political correctness is not merely correct, but morally obligatory as well.     

The Tacit–Explicit Connection: Polanyian Integrative Philosophy and a Neo-Polanyian Medical Epistemology

The purpose of this paper is to introduce an approach to clinical practice aiming to resolve the dilemma of choosing between a mechanistic and a phenomenological model. The approach is an extension of Polanyi's epistemology. Michael Polanyi (1891–1976), devised an epistemology of science which overcomes the problem of detachment, inherent in the mechanistic approach, and resolves the problem of subjectivity troubling phenomenologists. His epistemology is known as Personal Knowledge. An extension of this epistemology, a Neo-Polanyian proposal, is offered as a more successful model for clinical practice than previous suggestions addressing the dilemma.     

Social attitudes and education: Self-selection or socialization?

The aim of this study was to replicate earlier findings (Ekehammar et al., 1987) concerning the relationship between social attitudes and educational direction and field of study, by addressing further the causality issue. The sample comprised 256 Swedish adolescents from metropolitan Stockholm attending the two lowest grades in secondary school (modal age was 17 years). The main findings of the previous study were replicated, although the statistical power was weaker. Two higher-order attitude dimensions (labeled Political-economic conservatism and Social conservatism) discriminated between six groups, based on combinations of the two aspects of education. The main picture evidenced a socialization effect regarding Political-economic conservatism and a self-selection explanation for Social conservatism. Introducing intellectual ability as an independent variable in the causal model, affecting both educational direction and social attitudes, weakened the relationship, as compared to the previous study.     

Should knowledge entail belief?

The appropriateness of S5 as a logic of knowledge has been attacked at some length in the philosophical literature. Here one particular attack based on the interplay between knowledge and belief is considered: Suppose that knowledge satisfies S5, belief satisfies KD45, and both the entailment property (knowledge implies belief) and positive certainty (if the agent believes something, she believes she knows it) hold. Then it can be shown that belief reduces to knowledge: it is impossible to have false beliefs. While the entialment property has typically been viewed as perhaps the least controversial of these assumptions, an argument is presented that it can plausibly be viewed as the culprit. More precisely, it is shown that this attack fails if we weaken the entailment property so that it applies only to objective (nonmodal) formulas, rather than to arbitrary formulas. Since the standard arguments in favor of the entailment property are typically given only for objective formulas, this observation suggests that care must be taken in applying intuitions that seem reasonable in the case of objective formulas to arbitrary formulas.Research sponsored in part by the Air Force office of Scientific Research (AFSC), under Contract F49620-91-C-0080. The United States Government is authorized to reproduce and distribute reprints for governmental purposes.     

Effects of mood and knowledge on evaluations: An experimental study

An experimental study was conducted to estimate the impact of subjects' mood states on their responses to evaluative ratings. Four experimental groups were induced by either a very negative, mildly negative, neutral or positive mood-inducing film. As hypothesized, systematic differences were found between the groups in their evaluations. Factual knowledge about the evaluation object was, contrary to expected, not found to modify mood effects. This negative finding could, however, be explained by a strong stereotypical impression of the object (a distant travel destination) held by the respondents.