On Jaśkowski's discussive logics

We expose the main ideas, concepts and results about Jakowski's discussive logic, and apply that logic to the concept of pragmatic truth and to the Dalla Chiara-di Francia view of the foundations of physics.Partially supported by grants from JNICT (Portugal) and FAPESP (Brazil), Philosophy Section. Portions of this paper were concluded while the second author visited the Math-Phys Seminar at the University of Algarve (Portugal).Presented byCecylia Rauszer     

R&D system in the petrochemical industry in Brazil: Institutional challenge under privatization

Brazil has achieved a tremendous, short-term growth in its petrochemical sector. In 1989 it placed eleventh in the world ranking of petrochemical producers. The main factor responsible for this success was the establishment of three integrated petrochemical complexes in which the government stimulated joint-ventures between a state enterprise, national private and foreign corporations: the so-called “tripartite model.” In this model, foreign partners should provide the necessary technology, state enterprise financial capital and access to raw materials, and the national private bouregoisie legitimacy to the state, as well as, access to the Brazilian market. The tripartite model promoted the creation of several small, single-product petrochemical firms without entrepreneurial scale to carry out efficient R&;D activities. The result is that the Brazilian petrochemical sector is at risk of becoming technologically static and, consequently, uncompetitive; hampering further national capital accumulation. The R&;D system, originally designed to complement the inventive activities of firms, was based on government research centers. In 1988, a new institutional design was proposed, based on a research center managed by the state holding company PETROQUISA. The conception changed from state intervention toward shared responsability by stockholders. This institutional change opens two basic questions: Given that the locus of innovation in this industry has been historically located in the firm, can any other institutional arrangement substitute it?; and, will it be possible, given the government privatization program, to develop a R&;D system on the assumption that stockholders are willing to share the cost of R&;D activities? This article addresses these two questions.     

Balancing fit and parsimony to improve Q-matrix validation

The Q-matrix identifies the subset of attributes measured by each item in the cognitive diagnosis modelling framework. Usually constructed by domain experts, the Q-matrix might contain some misspecifications, disrupting classification accuracy. Empirical Q-matrix validation methods such as the general discrimination index (GDI) and Wald have shown promising results in addressing this problem. However, a cut-off point is used in both methods, which might be suboptimal. To address this limitation, the Hull method is proposed and evaluated in the present study. This method aims to find the optimal balance between fit and parsimony, and it is flexible enough to be used either with a measure of item discrimination (the proportion of variance accounted for, PVAF) or a coefficient of determination (pseudo-R²). Results from a simulation study showed that the Hull method consistently showed the best performance and shortest computation time, especially when used with the PVAF. The Wald method also performed very well overall, while the GDI method obtained poor results when the number of attributes was high. The absence of a cut-off point provides greater flexibility to the Hull method, and it places it as a comprehensive solution to the Q-matrix specification problem in applied settings. This proposal is illustrated using real data.     

Job Insecurity and Well-Being: Moderation by Employability

The present study investigates the relationship between job insecurity and well-being (psychological distress and life satisfaction), and the potential role of employability in this relationship. With regard to job insecurity, we hypothesize that job insecurity may be related to poor well-being. Regarding employability, two avenues are taken. First, we argue that employability may be beneficial in much the same way that job security is. Second, we suggest that employability may mitigate likely unfavourable consequences of job insecurity for employees’ well-being. Hypotheses are tested with a sample of 639 Belgian employees from six organizations. The results suggest that job insecurity is related to poor well-being, while no such association is found for employability. Furthermore, employability moderates the relationship between job insecurity and life satisfaction, as expected. Specifically, the model accounts for 8% of the explained variance. However, this pattern of results is not replicated for psychological distress.     

Effects of morphine hydrochloride on social encounters between male mice

The effects of a single injection of morphine hydrochloride (0.3, 0.6, or 1.25 mg/kg) or physiological saline (0.9% NaCI) on the agonistic behaviour elicited by isolation in male mice were examined. Individually housed mice were exposed to anosmic “standard opponents” 30 minutes after drug administration, and the encounters were videotaped and evaluated using an ethologically based analysis. Morphine (at 0.6 and 1.25 mg/kg) significantly and dose-dependently decreased time spent in offensive (“threat” and “attack”) and “digging” behaviours but markedly increased “non-social exploration” without a significant increase of “immobility.” The lowest dose was completely ineffective in producing changes in any of the behaviours studied. It is concluded that these results present a specific ethopharmacological profile characterized by suppression of aggressive behaviour, increase in non-social explotation, and no evident impairment of motor activity. © 1993 Wiley-Liss, Inc.     

Speech rhythm alterations in Spanish-speaking individuals with Alzheimer’s disease

Rhythm is the speech property related to the temporal organization of sounds. Considerable evidence is now available for suggesting that dementia of Alzheimer’s type is associated with impairments in speech rhythm. The aim of this study is to assess the use of an automatic computerized system for measuring speech rhythm characteristics in an oral reading task performed by 45 patients with Alzheimer’s disease (AD) compared with those same characteristics among 82 healthy older adults without a diagnosis of dementia, and matched by age, sex and cultural background. Ranges of rhythmic-metric and clinical measurements were applied. The results show rhythmic differences between the groups, with higher variability of syllabic intervals in AD patients. Signal processing algorithms applied to oral reading recordings prove to be capable of differentiating between AD patients and older adults without dementia with an accuracy of 87% (specificity 81.7%, sensitivity 82.2%), based on the standard deviation of the duration of syllabic intervals. Experimental results show that the syllabic variability measurements extracted from the speech signal can be used to distinguish between older adults without a diagnosis of dementia and those with AD, and may be useful as a tool for the objective study and quantification of speech deficits in AD.     

Pre‐menstrual period: Do women really consume more?

The aim of this study was to investigate female consumption behavior during the different menstrual cycle phases, regarding impulsivity, regret, willingness to pay, and purchase intention for hedonic and utilitarian products. This paper focuses on the gap between literary theory and common sense beliefs. A survey was conducted to 405 women. The results revealed no idiosyncrasy in behavior during the different cycle phases. Impulsive behavior explains the perception of regret; however, hormonal changes throughout the month could not support this correlation, which suggests the reported behavior to be different from the actual one. Copyright © 2016 John Wiley & Sons, Ltd.     

Impact of perceived value on casual mobile game loyalty: The moderating effect of intensity of playing

The retention rate of mobile game players is one of the subjects that spark most interest in the industry, as many abandon the games only a few hours after downloading them. This study examines the antecedents of loyalty towards mobile games from the perspective of perceived value and explores the moderating effect of intensity of playing. The results revealed that hedonic value (i.e., perceived enjoyment and perceived attractiveness) and, to a lesser extent, utilitarian value (i.e., effort expectancy and perceived usefulness) are crucial in the loyalty that players feel towards mobile games. Intensity of playing weakens the relationship between perceived usefulness, perceived enjoyment and loyalty intention. Based on the findings, theoretical and practical implications are provided.     

Sabina Spielrein: From Being a Psychiatric Patient to Becoming an Analyst Herself

In this paper, I evaluate Sabina Spielrein’s life and ideas from a contemporary understanding. I do this by considering the context and situation in which she lived: a journey from being a hospitalized psychiatric patient to becoming a psychoanalyst herself. From her crucial life experiences she learned that the main psychic conflicts stem from the struggle between life and death, and not from opposing ego drives and sexual desires. Spielrein’s considerable creative potentials were nurtured, as well as blocked by her inner conflicts, but also by the enormous historical conflicts of her time.

     

Spelling development in the Spanish language

This study focused on spelling development in Spanish children from elementary grades. A sample of 1045 was selected from 2nd to 6th grade belonging to four schools in Tenerife Island with an age range between 7 and 12 years old (M = 113.8, SD = 17.6). We administered a standardized writing test that includes diverse subtests to assess spelling, ruled and not ruled, and various written composition tasks (i.e., writing a story based on vignettes, describing a character and writing a story). We calculated the average of correct spellings in each variable and school level, and we also analyzed the type of misspellings that children made across different writing tasks. We found that spelling is acquired by 4th-grade children when it is not ruled, whereas the spelling of ruled words is acquired by 5th-grade children. When we analyzed the misspellings in a dictation task, we found that the children confused spelling of the graphemes c/s/z/x. Across different writing tasks, we found that students committed more misspellings with the graphemes b/v, h y c/s/z/x before they finished the 4th elementary grade.