维特根斯坦和传统

维特根斯坦在奥地利-维也纳传统中长大,并坚定地植根于这一传统之中。任何理解他的人格的尝试都必须设法把他置于这一背景中加以考察。但维特根斯坦作为哲学家的工作,几乎完全是在他并不分享其文化传统、并且对他本人是非常不相宜的环境中完成的。     

Henkin Quantifiers and the Definability of Truth

Henkin quantifiers have been introduced in Henkin (1961). Walkoe (1970) studied basic model-theoretical properties of an extension L _* ¹(H) of ordinary first-order languages in which every sentence is a first-order sentence prefixed with a Henkin quantifier. In this paper we consider a generalization of Walkoe's languages: we close L _* ¹(H) with respect to Boolean operations, and obtain the language L ¹(H). At the next level, we consider an extension L _* ²(H) of L ¹(H) in which every sentence is an L ¹(H)-sentence prefixed with a Henkin quantifier. We repeat this construction to infinity. Using the (un)-definability of truth – in – N for these languages, we show that this hierarchy does not collapse. In addition, we compare some of the present results to the ones obtained by Kripke (1975), McGee (1991), and Hintikka (1996).     

Predicting educational achievement from genomic measures and socioeconomic status

The two best predictors of children's educational achievement available from birth are parents’ socioeconomic status (SES) and, recently, children's inherited DNA differences that can be aggregated in genome‐wide polygenic scores (GPS). Here, we chart for the first time the developmental interplay between these two predictors of educational achievement at ages 7, 11, 14 and 16 in a sample of almost 5,000 UK school children. We show that the prediction of educational achievement from both GPS and SES increases steadily throughout the school years. Using latent growth curve models, we find that GPS and SES not only predict educational achievement in the first grade but they also account for systematic changes in achievement across the school years. At the end of compulsory education at age 16, GPS and SES, respectively, predict 14% and 23% of the variance of educational achievement. Analyses of the extremes of GPS and SES highlight their influence and interplay: In children who have high GPS and come from high SES families, 77% go to university, whereas 21% of children with low GPS and from low SES backgrounds attend university. We find that the associations of GPS and SES with educational achievement are primarily additive, suggesting that their joint influence is particularly dramatic for children at the extreme ends of the distribution.     

Inability to Withdraw from Work as Related to Poor Next‐Day Recovery and Fatigue among Women

Recovery from work stress is crucial in avoiding stress‐related ill‐health. The aim of this longitudinal study was to investigate whether processes that prolong the mental exposure to work stressors, such as inability to withdraw from work (IW), the core construct in overcommitment, predicts fatigue and poor next‐day recovery 6 months later over what is predicted by job control and job demands. Self‐ratings in questionnaires were completed by 160 women working in dental care at two time points, 6 months apart. Job demands, job control, and IW were used to predict fatigue and poor next‐day recovery, respectively. Multiple regression analyses show that having children living at home, high job demands, and high IW were associated with fatigue 6 months later. Job demands and IW, but not having children at home, predicted poor next‐day recovery. Mediation analyses using a bootstrapping procedure indicated that IW partly mediated the relationship between job demands and fatigue and between job demands and next‐day recovery. These findings highlight the importance of considering IW in relation to fatigue and recovery from work and that such factors should be included in interventions targeting work‐related stress.