Semantic Similarity of Alternatives Fostered by Conversational Negation

Conversational negation often behaves differently from negation as a logical operator: when rejecting a state of affairs, it does not present all members of the complement set as equally plausible alternatives, but it rather suggests some of them as more plausible than others (e.g., “This is not a dog, it is a wolf/*screwdriver”). Entities that are semantically similar to a negated entity tend to be judged as better alternatives (Kruszewski et al., 2016). In fact, Kruszewski et al. (2016) show that the cosine similarity scores between the distributional semantics representations of a negated noun and its potential alternatives are highly correlated with the negated noun-alternatives human plausibility ratings. In a series of cloze tasks, we show that negation likewise restricts the production of plausible alternatives to similar entities. Furthermore, completions to negative sentences appear to be even more restricted than completions to an affirmative conjunctive context, hinting at a peculiarity of negation.     

An Exploration of the Experiences of Elite Youth Footballers: The Impact of Organizational Culture

The present study explored how the organizational cultural experiences of elite youth footballers shaped their identity development and behavior. The first author occupied the position of sport psychology practitioner-researcher within 1 professional football club over 3 years. Traditional ethnographic research methods were employed, including observations, field notes, reflections, and informal interviews. A cultural sport psychology perspective on identity as a social construction and research on the cultural characteristics of professional football were used as frameworks to make sense of the data. Despite the introduction of the Elite Player Performance Plan in 2012, the traditional masculine culture of professional football dominated the studied club. Creative nonfiction vignettes revealed that youth players were encouraged to develop their self-stories focused on a single-minded dedication to professional football. The limited identity-related resources offered at both club and cultural level are detrimental for players in terms of their well-being and long-term psychological development. From the results of this study, we suggest that future sports psychology practice within professional football may best be delivered at an organizational level. However, for sport psychologists to be effective in this role, they must develop an understanding of the subcultural features and characteristics of the organization. In line with this, there would be great value in introducing a focus on organizational culture within sport psychology professional training and education routes.

Lay Summary: This paper explores the impact of the professional football culture on the psychological development of elite youth footballers. From the findings we suggest that sport psychology should be delivered at an organisational level.     

Finite Mixtures of Hidden Markov Models for Longitudinal Responses Subject to Drop out

Abstract

Drop out is a typical issue in longitudinal studies. When the missingness is non-ignorable, inference based on the observed data only may be biased. This paper is motivated by the Leiden 85+ study, a longitudinal study conducted to analyze the dynamics of cognitive functioning in the elderly. We account for dependence between longitudinal responses from the same subject using time-varying random effects associated with a heterogeneous hidden Markov chain. As several participants in the study drop out prematurely, we introduce a further random effect model to describe the missing data mechanism. The potential dependence between the random effects in the two equations (and, therefore, between the two processes) is introduced through a joint distribution specified via a latent structure approach. The application of the proposal to data from the Leiden 85+ study shows its effectiveness in modeling heterogeneous longitudinal patterns, possibly influenced by the missing data process. Results from a sensitivity analysis show the robustness of the estimates with respect to misspecification of the missing data mechanism. A simulation study provides evidence for the reliability of the inferential conclusions drawn from the analysis of the Leiden 85+ data.     

Penguins perceive variations of source- and filter-related vocal parameters of species-specific vocalisations

Animal Cognition - Animal vocalisations encode a wide range of biological information about the age, sex, body size, and social status of the emitter. Moreover, vocalisations play a significant...