On minima of discrimination functions

A discrimination function ψ(x,y) assigns a measure of discriminability to stimulus pairs x,y (e.g., the probability with which they are judged to be different in a same-different judgment scheme). If for every x there is a single y least discriminable from x, then this y is called the point of subjective equality (PSE) for x, and the dependence h(x) of the PSE for x on x is called a PSE function. The PSE function g(y) is defined in a symmetrically opposite way. If the graphs of the two PSE functions coincide (i.e., g≡h⁻¹), the function is said to satisfy the Regular Minimality law. The minimum level functions are restrictions of ψ to the graphs of the PSE functions. The conjunction of two characteristics of ψ, (1) whether it complies with Regular Minimality, and (2) whether the minimum level functions are constant, has consequences for possible models of perceptual discrimination. By a series of simple theorems and counterexamples, we establish set-theoretic, topological, and analytic properties of ψ which allow one to relate to each other these two characteristics of ψ.     

A Practical Guide to Experience-Sampling Procedures

Experience-sampling is a powerful method for understanding a range of psychological phenomena as they occur in the daily lives of individuals. In this primer, we discuss the different techniques, equipment, and design options available to the experience-sampling researcher. We place special emphasis on computerized procedures and discuss the crucial social dynamic of the research team, which optimizes the success of experience-sampling procedures.     

Promotion of Civic Engagement with the Family Leadership Training Institute

In this efficacy study, both quantitative and qualitative data were used to gauge the effects of the Family Leadership Training Institute (FLTI) on civic knowledge and empowerment, civic engagement, and community health. The sample of 847 FLTI participants and 166 comparison adults completed pretest and posttest surveys. Medium to very large short‐term effects were observed in civic literacy, empowerment, and engagement. Results mapping interviews were conducted with a stratified random sample of FLTI graduates (n = 52) to assess long‐term (M = 2.73 years) program impact. Most FLTI graduates (86%) sustained meaningful, sometimes transformative, levels of civic engagement after program completion. This engagement involved multiple forms of leadership, most often advocacy, program implementation, and media campaigns; 63% of graduates directed at least some of their activities to marginalized populations. Content analyses of graduates' civic (capstone) projects and results mapping story maps indicated that 81–90% of community activities aligned with public health priorities. Thus, one promising means to promote community health is to empower families to develop leadership skills, become engaged in civic life, and forge connections with diverse constituents.     

Lonely adolescents exhibit heightened sensitivity for facial cues of emotion

Contradicting evidence exists regarding the link between loneliness and sensitivity to facial cues of emotion, as loneliness has been related to better but also to worse performance on facial emotion recognition tasks. This study aims to contribute to this debate and extends previous work by (a) focusing on both accuracy and sensitivity to detecting positive and negative expressions, (b) controlling for depressive symptoms and social anxiety, and (c) using an advanced emotion recognition task with videos of neutral adolescent faces gradually morphing into full-intensity expressions. Participants were 170 adolescents (49% boys; M_age?=?13.65 years) from rural, low-income schools. Results showed that loneliness was associated with increased sensitivity to happy, sad, and fear faces. When controlling for depressive symptoms and social anxiety, loneliness remained significantly associated with sensitivity to sad and fear faces. Together, these results suggest that lonely adolescents are vigilant to negative facial cues of emotion.     

Habitual reappraisal in context: peer victimisation moderates its association with physiological reactivity to social stress

Although the emotion regulation strategy of reappraisal has been associated with adaptive outcomes, there is a growing evidence that it may not be adaptive in all contexts. In the present study, adolescents reported their use of habitual reappraisal and their experiences with peer victimisation, a chronic stressor that is associated with reduced well-being in this population. We examined how these variables predicted physiological reactivity (vagal withdrawal and changes in pre-ejection period) during a social stressor (i.e., Trier Social Stress Task). In line with previous research, at high levels of victimisation, habitual reappraisal predicted adaptive physiological reactivity (i.e., greater vagal withdrawal). Conversely, at low levels of victimisation, habitual reappraisal predicted maladaptive physiological reactivity (i.e., blunted vagal withdrawal). These findings were specific to parasympathetic reactivity. They suggest that habitual reappraisal may exert different effects on parasympathetic reactivity depending on the presence of stressors, and highlight the importance of examining the role of contextual factors in determining the adaptiveness of emotion regulation strategies.     

Confucianism,food, and sustainability

This paper addresses the issue of ecological sustainability and the dilemma between instrumental rationality and protection of the environment through a discussion of food production. In Confucianism, all human activities, including consumption of food, are seen as inseparable from problems of value. While Confucianism stresses the importance of healthy food, it rejects viewing nature as only having instrumental value. The Confucian view of sustainability can be seen from three parts: (1) Humans should follow the murmuring of their 'heart/mind' and seek to restrict the use of natural resources as much as possible to ‘let every being manifest its mandate to the full’; (2) Harmony with nature is a premise for sustaining humanity; and (3) Finally, taking care of the fundamental needs of the people is a premise for ecological sustainability.     

Intimate and Relational Loneliness in Adolescence

Research on peer-related loneliness in adolescence has paid insufficient attention to the distinction between intimate loneliness (i.e., in a dyadic relationship with a friend) and relational loneliness (i.e., in the broader peer group). This study examined the correlations among a broad set of loneliness scales. A sample of adolescents from Belgium (n?=?282; 60% female) completed 8 subscales of 6 established loneliness measures. Results revealed high correlations among these measures. At the same time, confirmatory factor analysis revealed the two expected factors, reflecting intimate and relational loneliness. Furthermore, it was found that boys experienced on average more intimate loneliness than girls, and girls experienced on average more relational loneliness than boys. As different types of loneliness are related to problems in different domains, and adolescents may experience one type of loneliness but not the other, it is essential to know which loneliness measure taps into which type of loneliness. The present study not only provides evidence for the distinction between intimate and relational loneliness, but also shows which type is covered by which of six commonly used loneliness measures. Based on these findings, researchers can now make a more deliberate selection of scales for future research, and can better interpret and integrate findings from previous studies that used different loneliness measures.     

Neuropsychological profile following suicide attempt by hanging: two adolescent case reports.

Hippocampal damage and amnesia following hypoxia and ischemia are described in the few published adult cases of suicide attempt by hanging. However, a recent review (Caine & Watson, 2000) suggests a variable pattern of brain involvement and neuropsychological impairments following hypoxic-ischemic injury that may or may not involve amnesia. To help clarify the impact of hanging on the developing brain, we examined neuropsychological functioning in two adolescents who survived suicide attempt by hanging. Despite differences in Glasgow Coma Scale (GCS), coma duration, and structural imaging findings, both patients had similar IQ (VIQ>PIQ) and presented with various combinations of deficits in expressive/receptive language, visual-constructional and perceptual ability, processing speed, attention, working memory, and/or executive functioning shortly after injury. In spite of their similarities, only one of the patients presented with classic amnesia symptoms in his early recovery. This patient was evaluated 1 year postinjury, and persistent deficits in processing speed and memory encoding were noted. Several hanging-related variables, including longer estimated hanging duration, greater weight, and severe airway edema, were thought to place this patient at increased risk for cognitive deficits. Clinical MRI scans of this patient obtained 6 weeks postinjury revealed mild volume loss as well as abnormalities in bilateral superior cortex. However, CT and MRI scans obtained throughout early recovery did not reveal overt evidence of injury to specific memory-related structures. Comprehensive neuropsychological evaluation of all adolescent survivors of suicide attempt by hanging is recommended, as a variety of postacute cognitive deficits were observed in these patients despite relatively short (相似文献   

Part-whole science

A scientific explanatory project, part-whole explanation, and a kind of science, part-whole science are premised on identifying, investigating, and using parts and wholes. In the biological sciences, mechanistic, structuralist, and historical explanations are part-whole explanations. Each expresses different norms, explananda, and aims. Each is associated with a distinct partitioning frame for abstracting kinds of parts. These three explanatory projects can be complemented in order to provide an integrative vision of the whole system, as is shown for a detailed case study: the tetrapod limb. My diagnosis of part-whole explanation in the biological sciences as well as in other domains exploring evolved, complex, and integrated systems (e.g., psychology and cognitive science) cross-cuts standard philosophical categories of explanation: causal explanation and explanation as unification. Part-whole explanation is itself one essential aspect of part-whole science.     

‘A Glorious Sun and a Bad Person’. Wittgenstein,Ethical Reflection and the Other

Most commentators working on Wittgenstein’s remarks on ethics note that he rejects the very possibility of traditional normative ethics, that is, a philosophically justified normative guide for right conduct. In this article, Wittgenstein’s view of ethical reflection as presented in his notebooks from 1936 to 1938 is investigated, and the question of whether it involves ethical guidance is addressed. In Wittgenstein’s remarks, we can identify three requirements inherent in ethical reflection. The first two is revealed in the realisation that ethical reflection presupposes both a clear understanding of oneself and a normative ideal of how one ought to live and reason. The third source of normativity springs from the fact that ethical reflection involves a relationship with the other, not as judge, but as example and addressee. In this way, ethical reflection is essentially relational. In the article, we unfold how these three normative sources figure in Wittgenstein’s remarks, especially how the third requirement, the relationship with the other, shows both a point of conversion and a difference between his view of ethics and religious faith. It will also be argued that even if Wittgenstein thus presents ethical reflection as a normatively guided activity, the content of the guidance is personal, springing solely from the reflecting individual.