Biclustering Models for Two-Mode Ordinal Data

The work in this paper introduces finite mixture models that can be used to simultaneously cluster the rows and columns of two-mode ordinal categorical response data, such as those resulting from Likert scale responses. We use the popular proportional odds parameterisation and propose models which provide insights into major patterns in the data. Model-fitting is performed using the EM algorithm, and a fuzzy allocation of rows and columns to corresponding clusters is obtained. The clustering ability of the models is evaluated in a simulation study and demonstrated using two real data sets.     

The psychometric properties of the Greek version of the State-Trait Anxiety Inventory in cancer patients receiving palliative care

Objectives: To validate the Greek version of the State-Trait Anxiety Inventory (STAI) in a sample of cancer patients. Design: The scale was administered twice, with a 3-day interval, to 99 eligible patients with cancer. Together with the Greek version of STAI scale, the patients also completed the anxiety subscale from the Hospital Anxiety and Depression scale (HAD). Observations: Factor analysis yielded a three-factor solution, explaining 47.143% of the variance. Cronbach α for three scales was between 0.729 and 0.852. Inter-scale correlations were moderate-to-high and ranged from 0.282 to 0.563 (p < 0.0005, p < 0.005). The assessment of the relationships among the Greek STAI scales and HAD-Anxiety showed statistically significant correlations between them (r ranged between 0.428 and 0.596, p < 0.0005). The test/retest reliability of scale (Pearson's ‘r’), showed that the coefficient agreement ranged between 0.85 and 0.90 (p < 0.0005). Univariate analysis revealed significant correlations between female gender, metastasis, performance status, chemotherapy, mild opioids and low education level with increased anxiety. Conclusions: These results support that the Greek version of STAI is an instrument with satisfactory psychometric properties, and is a valid research tool for Greek cancer patients.     

The Motive of Society: Aristotle on Civic Friendship, Justice, and Concord

My aim in this paper is to demonstrate the relevance of the Aristotelian notion of civic friendship to contemporary political discussion by arguing that it can function as a social good. Contrary to some dominant interpretations of the ancient conception of friendship according to which it can only be understood as an obligatory reciprocity, I argue that friendship between fellow citizens is important because it contributes to the unity of both state and community by transmitting feelings of intimacy and solidarity. In that sense, it can be understood as an important relationship predicated on affection and generosity, virtues lacking from both contemporary politics and society that seem to be merely dominated by Post-Enlightenment ideals. For Aristotle, friendship is important for society because it generates concord, articulating thus a basis for social unity and political agreement.     

Mapping Ethical Consumer Behavior: Integrating the Empirical Research and Identifying Future Directions

The concept of “ethical consumer behavior” has gained significant attention among practitioners and academic researchers, generating increasing but disjointed knowledge on the topic. By analyzing the empirical research on ethical consumer behavior, this article provides researchers with a map to guide future research. In total, we review 80 studies. The main contributions of the article include the identification of the main trends in the ethical consumer literature and the conceptualization of ethical consumer behavior. In addition, several areas for future research are proposed and discussed.     

Brexit and emergent politics: In search of a social psychology

In this paper, we develop a conceptual and methodological approach that psychologists and other social scientists can employ to study emergence. We consider relevant social psychological approaches and conclude that, for the most part, social psychology has tended to focus on processes of normalisation following disruptions, rather than examining emergence in itself. An exception to this is G. H. Mead, whose work we draw on to theorise emergence with a focus on contemporary “affective politics.” In the second part of the paper, we use focus group data on the European Union referendum in the UK to empirically illustrate our theoretical points. We discuss in particular three axes for exploring the emergent politics of Brexit: political values, political authority, and the authority of affect. We conclude our discussion by reflecting on some of the theoretical and political implications of our analysis.     

Chewing gum while studying: Effects on alertness and test performance

Recent research has demonstrated chewing gum can enhance various cognitive processes associated with learning, but most studies have used cognitive functioning tasks (e.g., selective attention and working memory) as outcomes. Across two experiments, we investigated effects of chewing gum on self‐reports of alertness and test performance following study of realistic educational materials. In Experiment 1 (n = 40), adult participants who chewed gum while studying a 20‐min physiology lesson outperformed a nonchewing condition on subsequent terminology and comprehension tests, but did not report higher levels of postlesson alertness as hypothesised. In Experiment 2 (n = 39), adult participants who chewed gum while studying a 9‐min lesson on a mental mathematics strategy outperformed a nonchewing condition on a subsequent problem‐solving test, whereas also reporting higher levels of postlesson alertness. The results provide initial support for chewing gum while studying realistic educational materials across a range of topics and study durations.     

Implicit training of nonnative speech stimuli

Learning nonnative speech contrasts in adulthood has proven difficult. Standard training methods have achieved moderate effects using explicit instructions and performance feedback. In this study, the authors question preexisting assumptions by demonstrating a superiority of implicit training procedures. They trained 3 groups of Greek adults on a difficult Hindi contrast (a) explicitly, with feedback (Experiment 1), or (b) implicitly, unaware of the phoneme distinctions, with (Experiment 2) or without (Experiment 3) feedback. Stimuli were natural recordings of consonant-vowel syllables with retroflex and dental unvoiced stops by a native Hindi speaker. On each trial, participants heard pairs of tokens from both categories and had to identify the retroflex sounds (explicit condition) or the sounds differing in intensity (implicit condition). Unbeknownst to participants, in the implicit conditions, target sounds were always retroflex, and distractor sounds were always dental. Post-training identification and discrimination tests showed improved performance of all groups, compared with a baseline of untrained Greek listeners. Learning was most robust for implicit training without feedback. It remains to be investigated whether implicitly trained skills can generalize to linguistically relevant phonetic categories when appropriate variability is introduced. These findings challenge traditional accounts on the role of feedback in phonetic training and highlight the importance of implicit, reward-based mechanisms.     

Brief psychodynamic psychotherapy in adolescent depression: Two case studies

In this paper the authors outline the basic principles of a manualized, brief psychodynamic approach that was evaluated as part of an outcome study within the National Health Service researching the effectiveness of two different forms of psychotherapy for major depression in childhood/adolescence: Focused Individual Psychodynamic Psychotherapy and Systems Integrative Family Therapy. As well as describing some of the difficulties encountered in short-term dynamic psychotherapy with adolescents, the authors present therapeutic work with two adolescents with major depressive disorder who were both seen as part of the research study. The authors depict some of the challenges and unavoidable difficulties which emerged during the therapy, arising from the needs of the research programme.