Revisiting the suitability of antisaccade performance as an endophenotype in schizophrenia

Poor performance on the antisaccade task has been proposed as a candidate endophenotype in schizophrenia. Caveats to this proposal, however, include inconsistent findings in first-degree relatives of individuals with schizophrenia, and substantial heterogeneity in individuals with the disorder. In this study, we examined antisaccade performance in patients and relatives, and sought to establish whether antisaccade measures could differentiate between two patients clusters identified in the Western Australian Family Study of Schizophrenia with either pervasive cognitive deficits (CD) or cognitively spared (CS). Ninety-three patients (CD = 47, CS = 46), 99 relatives and 62 healthy controls carried out a standard antisaccade task. Results showed: (i) significantly greater error rate, and prolonged latencies to correct responses and self-correction saccades in patients compared with controls; (ii) high error rates in relatives of poorly performing patients; (iii) longer latencies of self-correction saccades in relatives compared to controls; and (iv) higher error rate and longer latencies of self-correction saccades in the CD subgroup compared with CS. Unaffected relatives as a group were unimpaired in error rate as compared to healthy controls. These findings suggest that the antisaccade error rate and latency of self-correction saccades are useful measures in specific applications of genetic research in schizophrenia, without fully meeting endophenotype co-familiality requirements.     

Space and Language in Conceptualizing Identity

In this paper, we discuss the conceptualization of space as a dimension relevant to personal identity and the central role that is attributed to language with respect to its constitution. It is argued that the identification with a certain geographical space and the use of (a) certain language(s) or linguistic variety can be regarded as crucial for the self-definition of individuals and also groups. We pursue a threefold goal: (1) to highlight the contribution of geographical research to our understanding of the self as a phenomenon situated in space; (2) to discern merits, but also problems related to the recent strong emphasis of the role of language with respect to identity constitution, especially in constructivist and poststructuralist approaches; and (3) on the basis of these findings, to draw conclusions concerning the given and constructed elements of identity, with a particular focus on space and language. In addition to a survey of relevant theoretical positions, empirical examples are presented with the aim to illustrate how geographically marked identity is constituted.

     

Educational Science Students’ Implicit Theories of Creativity

This article presents the results of research into the implicit theories of creativity of Educational Science students preparing for the role of educational counsellors. Educational Science students will soon be working in educational institutions where they are expected to support creativity. Prospective (pre)school counsellors were asked about how they perceive and how they experience creativity in their own schooling by means of a questionnaire and focus group interview. Participants’ answers were analyzed using quantitative and qualitative content analyses. The data obtained from the questionnaire showed that the students mainly defined creativity as the characteristic of a person or process. They saw the major possibility for developing creativity during university studies in stimulating teaching activities and a supportive educational climate. The data from the focus group expanded the students’ definition of creativity through the domain of the expression and the valuation of creativity. In the discussion about the development of creativity during university studies, the role of the study program and the students’ individual characteristics were highlighted. The aspects of Educational Science education that need to be changed to increase the quality of the preparation of future educational counsellors are also considered.     

Language-mediated object categorization: A longitudinal study with 16- to 20-month-old Serbian-speaking children

This study addressed the development of language-mediated categorization longitudinally, on a sample of Serbian-speaking children aged 16–20 months. Twenty four children were tested 3 consecutive times on: categorization of unknown objects with a shared label and a similar shape; and categorization of unknown objects with a shared label, but no visual similarity. The task was embedded in a game-like activity which included real object manipulation, categorization of novel objects labeled with made-up names, and socio-pragmatic cues provided by the experimenter. Our results indicate that an average child develops the ability to categorize novel objects with a similar shape and a shared label around 16 months of age, whereas for novel objects with a shared label, but no visual similarity, this ability is acquired sometime between 18 and 20 months of age. Our results partly confirm research findings obtained in other languages, thus emphasizing the need for cross-linguistic and cross-cultural validation of all language-related developmental studies.     

The Effect of Locus of Control on University Students' Mental Health: Possible Mediation through Self-Esteem and Coping

The purpose of this study was to examine the effect of locus of control on university students' mental health and to examine possible mediational roles of self-esteem and coping. A total of 418 university students completed Rotters I-E Scale, Self-liking/self-competence Scale, Endlers Coping with Stressful Situations Scale and Depression, Anxiety and Stress Scale. The results showed that external locus of control, lower self-liking and self-competence, as well as less problem-focused and more emotion-focused coping predict more symptoms of depression, anxiety, and stress in university students. However, mediational analysis revealed that the effect of locus of control was fully mediated by self-esteem and coping, with self-liking and emotion-focused coping being the strongest mediators. Results suggest that beliefs about control affect beliefs about one's self-worth and coping strategies, which in turn can affect one's mental health.     

Research Integrity Practices from the Perspective of Early-Career Researchers

Unavailability of published data and studies focused on young researchers in Europe and research integrity issues reveals that clear understanding and stance on this subject within European area is lacking. Our study provides information on attitudes and experiences of European researchers at early career stages (doctoral and postdoctoral level), based on a limited sample of respondents (n = 27). The study provides both quantitative and qualitative results for the examined issues. The data suggest that awareness and interest of the younger researchers surveyed in research integrity issues is high, however, it is often based on self-initiatives, with many of the respondents not having adequate training or any possibility to obtain it. Our attitude survey conducted within the European Council of Doctoral Candidates and Junior Researchers indicates that only 22 % of respondents had an opportunity to obtain relevant training (significantly less than in a study conducted in the U.S.), and that only one third believed that institutions and supervisors regularly paid attention to it. Further, we noted certain differences between disciplines. The study also reveals that many younger researchers felt they faced problems due to the misconduct of their senior colleagues and the existing institutional culture. The results of the study indicate a need for better prevention mechanisms, training and raising awareness activities. Preferably, junior researchers should be given an active role in shaping the integrity culture. It should be noted that the presented results should be considered in the context of the limitations stemming from the small-scale survey. This paper encourages further research activities on research integrity practices to provide stronger evidence on the attitudes and experiences of young researchers in Europe and other parts of the world.     

Variation with density of the transport properties of YBaCuO superconductors

Abstract

The dependence of the normal-state resistivity, resistive superconducting transition (T _c, ΔT _c), and of the upper critical-field slope (dH _c2/dT|T=T_c) on density has been investigated for several YBa₂Cu₃O_9-x(x?2.1) samples. The resistivity decreases rapidly with increasing density, whereas T _c and ΔT _c are rather insensitive to a change in density. dH _c2/dT|T_c depends sensitively on the preparation conditions. The implications of these results both for the evaluation of the parameters relevant to the understanding of the nature of superconductivity and for the technological applications of granular superconductors are briefly discussed.     

How immigrant adolescents' self‐views in school and family context relate to academic success in Germany

Immigrants' sense of self can be derived both from being members of their ethnic in‐group and their country of residence. We examined how the ways in which immigrant adolescents integrate these self‐views in relation to academic success in German schools. Students describe themselves at school and when with family. Using a standardized literacy performance test, analyses revealed that immigrants whose school‐related self‐view did not include Germany were less successful: Students who described their self as including both aspects of their ethnic group and Germany, and students who saw themselves predominantly as German, outperformed students with purely ethnic school‐related selves. As expected, though, an ethnic family‐related self‐view did not have a negative impact on scholastic achievements.