On Sahlqvist Formulas in Relevant Logic

This paper defines a Sahlqvist fragment for relevant logic and establishes that each class of frames in the Routley-Meyer semantics which is definable by a Sahlqvist formula is also elementary, that is, it coincides with the class of structures satisfying a given first order property calculable by a Sahlqvist-van Benthem algorithm. Furthermore, we show that some classes of Routley-Meyer frames definable by a relevant formula are not elementary.     

Nanotechnology Policies in Latin America: Risksto Health and Environment

The presence of nanotechnologies grew and spread throughout Latin America during the first decade of the 21st century. Science and Technology policies have played an important role in the performance of these new technologies. Various international institutions, such as the World Bank, the Organization for Economic Co-operation and Development, and the Organization of American States promoted similar Science and Technology policies, and included nanotechnology as a priority area. This article shows the role of these Science and Technology policies in the promotion of specific objectives and the gap that was left due to the failure to incorporate an examination of the potential risks to health and environment, not to mention other labor-related effects. The omission of matters relevant to workers and consumers by these institutions led to a distancing from organized civil society.     

Husserl’s philosophy of mathematics: its origin and relevance

This paper offers an exposition of Husserl's mature philosophy of mathematics, expounded for the first time in Logische Untersuchungen and maintained without any essential change throughout the rest of his life. It is shown that Husserl's views on mathematics were strongly influenced by Riemann, and had clear affinities with the much later Bourbaki school.

Multivariate repeated measures designs

In the social, behavioral, and health researches it is a common strategy to collect data along time on more than one group of participants on multiple dependent variables. To analyse this kind of data is very complicated due to the correlations between the measures taken in different points of the time, and between the answers. Usually to analyse these data the multivariate mixed model, or the doubly multivariate model, are the most frequent approaches. Both of them require combined multivariate normality, equal covariance matrices, independence between the observations of different participants, complete measurements on all subjects, and time-independent covariates. When one ore more of these assumptions are not accomplished these approaches do not control in the correct way the Type I error, and this affects the validity and the accuracy of the inferences. In this paper some solutions that solve the problems with the error Type I will be shown. Several programs for a correct realization of the analyses through the SAS Proc Mixed procedure are presented.     

Development and validation of a vocational interests questionnaire revised: the CIP 4

The "Cuestionario de Intereses Profesionales (CIP, Vocational Interests Questionnaire)" was developed by Fogliatto et al in three different versions: a paper and pencil-based one, a computer-based one, and a revised form. The instrument was originally created for the assessment of vocational interests of adolescents assisting the last years of the secondary school in Argentina. The aim of the present study was to adapt the inventory for the adolescents coursing the initial period of the secondary school. Psychometric studies analyzing the factorial structure of the instrument and internal consistence of their scales were accomplished. Additionally, evidences of criterion validity concerning to a specialized field of the secondary school and career choice intentions were analyzed. Results bring initial validity evidence of this new version of the CIP, which its main utility is career counseling applied to late-adolescence. Further studies are required in order to validate this instrument for being utilized in counseling of adolescent facing decisions related to specialty choice of the secondary school.     

Mutuality and reciprocity in the psychological contracts of employees and employers

The authors assessed the joint perceptions of the employee and his or her employer to examine mutuality and reciprocity in the employment relationship. Paired psychological contract reports were obtained from 80 employee-employer dyads in 16 university-based research centers. On the basis of in-depth study of the research setting, research directors were identified as primary agents for the university (employer) in shaping the terms of employment of staff scientists (employees). By assessing the extent of consistency between employee and employer beliefs regarding their exchange agreement, the present study mapped the variation and consequences of mutuality and reciprocity in psychological contracts. Results indicate that both mutuality and reciprocity are positively related to archival indicators of research productivity and career advancement, in addition to self-reported measures of Met Expectations and intention to continue working with the employer. Implications for psychological contract theory are presented.     

La demande prélinguistique et linguistique: qu'apporte le langage?

This study deals with the adjustment of requests to the communication situation at two stages of development: the end of the prelinguistic period (18 months) and the beginning of the linguistic period (30 months). The main objective is to point out how language acquisition introduces new modalities of adjustment. The production of two groups of 12 children (18 and 30 months) were compared in three situations of object requesting: (a) the adult complies with the request (satisfaction), (b) the adult asks a clarification question (clarification), (c) the adult refuses to comply with the request (refusal). The similarities observed suggest a continuity between the two ages with respect to the functional aspects of requests. As for the structural aspects, the results reveal a partial continuity between the prelinguistic children (18 months) and the linguistic children (30 months): at the age of 18 months, children use vocalizations as they use words at 30 months and gestures are used similarly at both ages. The differences observed between both age groups suggest that, at the age of 30 months, language is used in order to find a solution to the request situation, yet without any major changes in the communicative strategies. The results of this study relativize the revolution brought about by language in the child's behaviours and specify its contribution to the adjustment of messages as a function of the communication situation.     

Validity of self-efficacy scale scores for a Spanish sample

This study analyzed the validity of the Sherer, et al. Self-efficacy Scale for a Spanish sample of 555 subjects, 257 men and 298 women. 415 were from the general population; 34 schizophrenics and 45 with eating disorders were from a clinic, plus 61 drug addicts from two centers. All met DSM-IV-R criteria. The Eysenck Personality Questionnaire, State-Trait Anxiety Inventory, Assertiveness Inventory, and the Self-control Questionnaire were administered. The reliability for total scores, general factor were high even when social self-efficacy was low. A bidimensional factor structure seemed more acceptable. The Self-efficacy scale scores correlated with those on the Self-control Questionnaire and the Assertiveness Inventory. Extraversion scores on the Sincerity dimension of the Eysenck Personality Questionnaire correlated with scores on the State-Trait Anxiety Inventory and Eysenck's Neuroticism and Psychoticism scales. Significant mean differences appeared between the general population group and the three clinical groups. These analyses support the usefulness of the scale for clinical practice and research with Spanish samples.     

The "style scheme" grounds perception of paintings

We studied the formation of style scheme (identification of the style that characterizes an artist) presenting 100 participants aesthetic visual stimuli. Participants were Spanish university students who volunteered: 72 women, 28 men of mean age 22.8 yr. Among those 50 were enrolled in History of Art and 50 students in Psychology. Stimuli belonged to different categories--High Art (pictures of well-known artists, like Van Gogh)/Popular Art (decorative pictures like Christmas postcards) and Representational (pictures with explicit meaning content, like a landscape)/Abstract (pictures without explicit meaning content, like Pollock's colored stains). Analysis using Signal Detection Theory techniques focused on how participants discriminate representational and abstract pictures. With High Art stimuli, participants can better discriminate representational paintings than abstract ones. However, the difference in discrimination between representational and abstract pictures diminishes among participants studying History of Art. It seems that prior education in art favors forming style schemes and to some extent enables the participant to detect the "meaning" in High Art abstract paintings.     

An exploratory study of perceived discrimination and homesickness: a comparison of international students and American students

The authors examined group differences in perceived discrimination and homesickness in a sample of 439 college students (198 international and 241 U.S. students) from 2 campuses of the same university. Within the international student group, the authors also examined relationships between homesickness, discrimination, age, English proficiency, and years of residence in the United States. Results indicated that international students experienced higher levels of discrimination and homesickness than did U.S. students. Age, English proficiency, and perceived discrimination predicted homesickness among the international students. Younger students, students with lower levels of English proficiency, and students with higher levels of perceived discrimination reported having higher levels of homesickness. Also, years of residence and race or ethnicity predicted international students' level of perceived discrimination. Being a European international student predicted lower levels of perceived discrimination than did being an international student from other regions of the world. The authors discuss implications for higher-education institutions and counseling personnel.