On Ratio Measures of Confirmation

There are different Bayesian measures to calculate the degree of confirmation of a hypothesis H in respect of a particular piece of evidence E. Zalabardo (Analysis 69:630–635, 2009) is a recent attempt to defend the likelihood-ratio measure (LR) against the probability-ratio measure (PR). The main disagreement between LR and PR concerns their sensitivity to prior probabilities. Zalabardo invokes intuitive plausibility as the appropriate criterion for choosing between them. Furthermore, he claims that it favours the ordering of pairs evidence/hypothesis generated by LR. We will argue, however, that the intuitive non-numerical example provided by Zalabardo does not show that prior probabilities do not affect the degree of confirmation. On account of this, we conclude that there is no compelling reason to endorse LR qua measure of degree of confirmation. On the other side, we should not forget some technicalities which still benefit PR.     

Comparing Television Use and Reading in Children With ADHD and Non-Referred Children Across Two Age Groups

There has been abundant speculation, but very little research, concerning the role of television in the lives of children with attention deficit hyperactivity disorder (ADHD). This study compared the use of television and other media in samples of children with ADHD and nonreferred children. Children with ADHD were reported to watch more television, a difference partially accounted for by demographic and environmental characteristics. Children with ADHD were also reported to enjoy television more and have greater involvement in television-related activities, and to enjoy reading less and be less involved in reading-related activities. However, there were no diagnostic group differences in reports of weekly reading, and weekly reading was unrelated to television viewing in children with ADHD. Results suggest a complex relation between television viewing and ADHD not recognized in previous research and popular commentary, and suggest that research on children with ADHD's television use should consider environmental and developmental contexts.     

Impact of anxiety and depression on the physical status and daily routines of cancer patients during chemotherapy

The evolution of symptoms, emotional state and daily routines in patients with breast cancer and lung cancer during treatment with intravenous chemotherapy (CT) is described and the influence of anxiety and depression on these variables is analyzed. 66 patients, 29 with breast cancer and 37 with lung cancer, were evaluated before starting treatment, and after completing the first, second and last cycle of CT using the Hospital Anxiety and Depression Scale (HADS), rating scales and interview. Less than 30% of the patients showed clinical anxiety or depression according to the HADS. Throughout the treatment, tiredness, fatigue and nausea increased significantly and work and leisure activity decreased. Concern about the future of relatives and insomnia increased significantly over time in patients with breast cancer whereas they decreased in patients with lung cancer. By introducing the HADS scores as covariates, it was found that most differences are due to the time factor and the type of cancer. During treatment with CT, emotional disturbances do not seem to have significant impact on the symptoms and changes in daily life reported by cancer patients.     

Buddhist Narratives of the Great Debates

Western scholars have written on the theory of Buddhist argumentation. They have also analyzed examples of arguments found in philosophical and polemical writing. However, little has been written to date about what might have transpired when Buddhists and their opponents met in face-to-face debates in classical India. Drawing on Chinese and Tibetan historical and biographical writings about famous Indian debates, this essay analyzes the structure and conventions of these accounts as a literary form. While it is difficult to assess the historicity of particular narratives, an analysis of this literature as a whole gives us clues about what might have occured when Indian scholars faced their adversaries in live debates. These sources provide us with a picture of the etiquette, rules of engagement, and strategies that may have been used in such encounters. They also suggest what constituted defeat in ancient Indian verbal contests, and they point to some of the real-political and material benefits of victory. The essay ends by reflecting on the function of these narratives vis-à-vis Tibetan Buddhist scholastic identity.

Intracranial self-stimulation improves memory consolidation in rats with little training

Post-training intracranial electrical self-stimulation can improve learning and memory consolidation in rats. However, the molecular mechanisms involved are not known yet. Since previous paradigms of this kind of facilitation are relatively unsuitable to try a molecular approach, here we develop a single and short model of learning and memory facilitation by post-training self-stimulation that could make easier the research of its neural and molecular basis. Thus, three consecutive experiments were carried out to ascertain whether post-training self-stimulation is able to facilitate memory when learning consists of only a brief (5 trials) two-way active avoidance conditioning session. The results of Experiment 1 showed that it is actually possible, and that 48 h after the acquisition session is a very good time to observe the memory improvement. As a way to probe the retroactive effect of self-stimulation, in Experiment 2 we observed that the same self-stimulation treatment given to the subjects not post-training but 48 h before a single two-way active avoidance session does not improve the acquisition of conditioning. In Experiment 3, we showed that the SS facilitative effect observed 48 h after the acquisition session in Experiment 1 was still maintained one week later. We concluded that post-training intracranial self-stimulation can consistently improve memory consolidation even when little acquisition training is given to the animals in a single training session.     

Facilitation of a Distributed Shuttle-Box Conditioning with Posttraining Intracranial Self-Stimulation in Old Rats

Old Wistar rats (16–17 months) were trained in a two-way active avoidance task for 5 consecutive days (10 trials/day). Immediately after each training session a lateral hypothalamic intracranial self-stimulation session (ICSS group) or a sham-treatment session (Control group) was given to the animals. Long-term retention was tested 7 days after the last acquisition session. ICSS treatment led to a significant improvement in acquisition. In the long-term retention session the level of avoidance in both groups was similar to that achieved in the last acquisition session, although differences among groups failed to reach statistical significance. These results are compared with those obtained in previous experiments with young adult rats. While ICSS facilitated the process of acquisition in both young and old rats (however, it was much more powerful in young animals), further experiments are needed to elucidate whether this effect is long-lasting in old rats, as occurs in young adult subjects.     

The Personalities of Presidents as Independent Variables

The debate about the relative importance of the personality traits of presidents has a long history. Until the mid-1970s, scholars of the presidency extensively focused on the uniqueness of the individuals that held office. However, the difficulty in capturing presidential personalities and measuring their impact on executive politics led to a significant quantitative shift that focused more on the institutions within which presidents operate. This change produced a long-lasting divide between researchers interested in the “institutional” presidency and those focused on the “personal” presidency. I propose to integrate both approaches by incorporating insights from differential psychology to treat the personality traits of presidents as independent variables. In support of the argument, I use data from an expert survey that captured psychometric traits of presidents who governed the Western Hemisphere in 1945–2012 to reassess an influential study about Latin American presidents. The results show that adding openness to experience leads to a deeper understanding of presidential approval. I conclude by arguing that measuring the personality traits of all sorts of leaders is necessary to modernize the study of elites.     

Psychological and Social Factors that Promote Positive Adaptation to Stress and Adversity in the Adult Life Cycle

The phenomenon of resilience reflects positive adaptation despite contexts of risk, significant adversity, or trauma (Masten and Powell 2003; Luthar 2006). The purpose of this investigation was to propose a mediation model to explain the relation between stress and some psychological and social resources that enhance positive adaptation throughout the entire adult life cycle, and to explore the moderator role of age and country of origin. The indicator of positive adaptation was life satisfaction (LS). The sample comprised 171 Mexicans and 154 Spaniards (N?=?325), aged between 18 and 87?years. Mediation was tested by means of various hierarchical regression analyses, which revealed that the positive adaptation process is enhanced by a group of psychological and social resources that mediate the effects of stress on LS. Self-esteem, optimism, internal control, coping aimed at acceptance, and coping aimed at seeking emotional support, as well as social contacts can mediate the negative effects of stress. Finally, it was found that age moderates the internal control but none of the remaining variables whereas the country does not moderate the relation of the variables.