Multiplicity and indiscernibility

Synthese - The indistinguishability of bosons and fermions has been an essential part of our ideas of quantum mechanics since the 1920s. But what is the mathematical basis for this...     

The Great Divide: Academic Versus Practitioner Criteria for Psychometric Test Choice

This article looks at the two very different worlds of academic personality psychologists and business (human resources) professionals who both use personality tests. It examines the decisions practitioners make when choosing to purchase and use psychometric tests in the workplace. It reviews the relatively few papers on practitioner’s knowledge of, attitudes toward, and beliefs about psychological tests. Data are then reported from a study looking at practitioners’ rank ordering of criteria they would use in choosing psychological tests. This is contrasted with typical academic concerns as expressed in the literature. The article shows some divide between academic personality psychology researchers and those who purchase and use these tests in applied settings.     

The Influence of Activation Level on Belief Bias in Relational Reasoning

A novel explanation of belief bias in relational reasoning is presented based on the role of working memory and retrieval in deductive reasoning, and the influence of prior knowledge on this process. It is proposed that belief bias is caused by the believability of a conclusion in working memory which influences its activation level, determining its likelihood of retrieval and therefore its effect on the reasoning process. This theory explores two main influences of belief on the activation levels of these conclusions. First, believable conclusions have higher activation levels and so are more likely to be recalled during the evaluation of reasoning problems than unbelievable conclusions, and therefore, they have a greater influence on the reasoning process. Secondly, prior beliefs about the conclusion have a base level of activation and may be retrieved when logically irrelevant, influencing the evaluation of the problem. The theory of activation and memory is derived from the Atomic Components of Thought‐Rational (ACT‐R) cognitive architecture and so this account is formalized in an ACT‐R cognitive model. Two experiments were conducted to test predictions of this model. Experiment 1 tested strength of belief and Experiment 2 tested the impact of a concurrent working memory load. Both of these manipulations increased the main effect of belief overall and in particular raised belief‐based responding in indeterminately invalid problems. These effects support the idea that the activation level of conclusions formed during reasoning influences belief bias. This theory adds to current explanations of belief bias by providing a detailed specification of the role of working memory and how it is influenced by prior knowledge.     

How to be a type-C physicalist

This paper advances a version of physicalism which reconciles the “a priori entailment thesis” (APET) with the analytic independence of our phenomenal and physical vocabularies. The APET is the claim that, if physicalism is true, the complete truths of physics imply every other truth a priori. If so, “cosmic hermeneutics” is possible: a demon having only complete knowledge of physics could deduce every truth about the world. Analytic independence is a popular physicalist explanation for the apparent “epistemic gaps” between phenomenal and physical truths. The two are generally seen as incompatible, since the demon’s deductions seem to presuppose analytic connections between physical and phenomenal terms. I begin by arguing, in support of the APET, that implications from the complete truths of physics to phenomenal truths cannot be a posteriori. Such implications are (according to the physicalist) necessarily true. But they cannot be Kripke-style a posteriori necessities, since (according to the physicalist) the complete truths of physics fix any relevant a posteriori facts about the reference of terms. I then show how the physicalist can turn the tables: the demon can exploit the physical fixing of reference to bridge the gap between the vocabularies, by deducing when phenomenal and physical terms co-refer. This opens the way for a “type-C” physicalism, which accepts in-principle deducibility while still appealing to analytic independence to explain why we (who are not demons) find it impossible to see phenomenal-physical connections a priori.     

Extracurricular activities in young applicants’ résumés: What are the motives behind their involvement?

Applicants use résumés to demonstrate their knowledge, skills, abilities, and other personal characteristics (KSAOs) to recruiters, through education and job‐related or non‐job‐related experiences. But research suggests that the situation for young applicants is especially competitive, since they increasingly enter the labour market with similar educational credentials and limited job‐related experience. They may thus use non‐job‐related experiences, such as participation in extracurricular activities (ECAs) during their studies, to demonstrate KSAOs to recruiters, but also to add distinction and value to their credentials. ECAs may therefore become more important in the selection of young applicants. Yet few studies have undertaken a comprehensive and systematic analysis of the relationships students have with these activities. The purpose of this study was to investigate to what extent students’ involvement in ECAs is due to internal (e.g., passion) or external (e.g., résumé‐building) motives, and what factors influence these motives. Results from a study with 197 students suggest that students engage in ECAs mainly out of internal motives. But external motives are stronger for activities started closer to entering the labour market, for students active in associative or volunteering activities (as compared to sports or artistic activities), and for students holding leadership positions in their activities. Our results suggest that labour market pressure may be a key component of applicants’ involvement in ECAs. Also, organizations and recruiters may want to consider that students tend not to engage in ECAs purely out of internal motives, but also to add value to their credentials and match employers’ expectations.     

Why experiments matter*

Experimentation is traditionally considered a privileged means of confirmation. However, why and how experiments form a better confirmatory source relative to other strategies is unclear, and recent discussions have identified experiments with various modeling strategies on the one hand, and with ‘natural’ experiments on the other hand. We argue that experiments aiming to test theories are best understood as controlled investigations of specimens. ‘Control’ involves repeated, fine-grained causal manipulation of focal properties. This capacity generates rich knowledge of the object investigated. ‘Specimenhood’ involves possessing relevant properties given the investigative target and the hypothesis in question. Specimens are thus representative members of a class of systems, to which a hypothesis refers. It is in virtue of both control and specimenhood that experiments provide powerful confirmatory evidence. This explains the distinctive power of experiments: although modelers exert extensive control, they do not exert this control over specimens; although natural experiments utilize specimens, control is diminished.     

Parents Think Their Sons Are Brighter Than Their Daughters: Sex Differences in Parental Self-Estimations and Estimations of Their Children's Multiple Intelligences

In this study, 156 participants, predominantly White British adults (M age = 44.3 years) rated themselves on overall IQ and on H. Gardner's (1983) 7 intelligence subtypes. Parents (n = 120) also estimated the intelligence of their children. Men's self-estimates were significantly higher than women's (110.15 vs. 104.84). Participants thought their verbal, mathematical, and spatial intelligence scores were the best indicators of their own overall intelligence. Parents estimated that their sons had significantly higher IQs than their daughters (115.21 vs. 107.49). Self-estimates and estimates of children's multiple intelligences were higher for men and sons, significantly so for logical-mathematical and spatial intelligence. Parents rated 2nd-born daughters as having significantly higher verbal and musical intelligence than their male counterparts. Higher parental IQ self-estimates corresponded with higher IQ estimates for children. Results for 1st-born children were clearest and showed the most significant differences. The findings are interpreted in terms of sociocultural and familial influences and the possibility of actual sex differences in particular abilities.     

Eating-Problem Patients' Conceptions of Normality

Three groups of people—anorexic patients, helping professionals, and a control group—filled out the Eating Attitude Test (Garner & Garfinkel, 1979) three times. The control subjects were asked to fill it out honestly for themselves; as they imagined an ordinary person might complete it; and, finally, as they would expect a patient with an eating disorder to fill it out. The anorexic patients were asked to complete it honestly for themselves; as they imagined an ordinary person might fill it out; and, finally, as they would expect to fill it out when fully recovered. The professionals filled out the questionnaires as they imagined the typical patient with eating disorders might; as they imagined the ordinary person might complete it; and as a recovered patient might complete it. The results provided support for some but not all hypotheses, the most central of which was that there would be a difference between how the patients rated the ordinary person and how control subjects (supposedly ordinary people) rated themselves.     

In the spaces between – sustaining creativity in child psychotherapy

This paper gives an account of the developments in the intensive psychotherapy of a seven-year-old boy with global development delay. It also describes the adaptations to technique and the changes in the setting that were required to support the work, which was undertaken in a special school. The importance of the regularity of sessions in helping to establish object constancy; physical and mental boundaries in relation to me/not me; inside and outside is also explored. A central theme of the paper is how close observation can inform the understanding of the emotional states of disabled children, particularly those with little language. The paper draws links between the early communications of mothers and infants and the therapeutic relationship, with reference to music therapy. It describes banging as a form of communication and traces the development of banging into more coherent nursery rhymes arguing that this development is an internalisation of the rhythm of the therapy and of the growing understanding between the child and therapist.