A Refined Interpretation of Intuitionistic Logic by Means of Atomic Polymorphism

Studia Logica - We study an alternative embedding of IPC into atomic system F whose translation of proofs is based, not on instantiation overflow, but instead on the admissibility of the...     

Artificial Moral Agents: A Survey of the Current Status

Science and Engineering Ethics - One of the objectives in the field of artificial intelligence for some decades has been the development of artificial agents capable of coexisting in harmony with...     

John Keown: Euthanasia,ethics and public policy: an argument against legalisation, 2nd edition

Theoretical Medicine and Bioethics -     

Maternal perinatal representations and their associations with mother–infant interaction and attachment: A longitudinal comparison of Portuguese and Brazilian dyads

Prior research in Western countries (mostly the US, Canada and northern Europe) indicates that mothers' representations are associated with mother–infant interaction quality and their child's attachment security later in the first year. Fewer studies, however, have evaluated whether these associations hold for mother–infant dyads in other countries, such as Brazil and Portugal. Although these countries share a similar language and culture, they differ on societal dimensions that may affect parenting attitudes and mother–infant relationships, such as economic stress, social organisation, social policy, and the availability of services for young families. In this longitudinal study, we followed two independent samples of Brazilian and Portuguese mother–infant dyads from the perinatal period to 12 months post-partum. We assessed mothers' perinatal representations using semi-structured interviews in the first 48 hours after the infant's birth, and evaluated the associations of these representations with mother interaction quality at 9 months and infant attachment at 12 months. Results were similar in each country, corroborating prior research in single Western countries: Mothers with more positive perinatal representations were more sensitive to their infants during free play at 9 months and were more likely to have infants classified as securely attached at 12 months.     

Findings on the relationship between Internet addiction and psychological symptoms in Brazilian adults

This study evaluated the prevalence of Internet addiction (IA) and its association with negative psychological symptoms in Brazilian adults. A network analysis was conducted to estimate specific variables and their expected influence on IA. In this cross-sectional study, 15,476 adults (M_age = 37.5, SD = 9.59) completed an open web-based survey. Three questionnaires were used: the Internet Addiction Test (IAT), Depression Anxiety and Stress Scale (DASS-21) and Satisfaction With Life Scale (SWLS). Based on IAT scores, participants were classified as No-Risk user (NRU), Low-Risk user (LRU) or High-Risk user (HRU). We observed that 4.8% of the participants were classified in the HRU group. In addition, their risk for severe symptoms of depression was 10 times higher and, for anxiety, seven times higher than that in the NRU group (p < .001). Time spent using smartphones was also significantly higher in the HRU group (M_hours = 5.1, p < .001). The main factors associated with IA were depression, gender and anxiety, but the variable “having children” was the most influential in the IA network. These findings suggest that psychiatric symptoms are the main factors associated with IA among the adult population.     

Reading comprehension with the Go/No-Go procedure with compound stimuli

The present study investigated whether the Go/No-Go procedure with compound stimuli produces emergent relations among dictated words (A), pictures (B), and printed words (C) and the emergence of textual behavior (CD) using a multiple probe design across word sets. Three preschool children were exposed to 4 phases: (1) pretests for BC, CB, and CD relations, (2) pretraining with known stimuli, (3) AB and AC training, and (4) posttests for BC, CB, and CD relations. During AB and AC training, responses to A1B1, A2B2, A1C1, and A2C2 compound stimuli, but not to A1B2, A2B1, A1C2, and A2C1, were reinforced. The results showed that all participants met the learning criterion and demonstrated emergence of BC and CB relations (i.e., relations between pictures and printed words), and CD relations (i.e., textual behavior) after training. These results suggest that the Go/No-Go procedure with compound stimuli is an effective alternative for establishing reading comprehension.     

Understanding the link between work engagement and job satisfaction: Do role stressors underlie this relationship?

Drawing upon Job Demands-Resources (JD-R) theory, most research on hindrance demands has focused on the antecedent role of work engagement. However, no studies have analysed the potential effects of hindrance demands as moderators in the engagement-job satisfaction link. The objective of this study was to examine the moderator effect of role stressors (conflict and ambiguity) as hindrance demands in the relationship between work engagement and job satisfaction in a Spanish working sample. The sample was composed of 634 Spanish workers from different Southern service organizations. Hierarchical multiple regression results showed that the association between work engagement and job satisfaction decreased when role stress (particularly ambiguity) increased. These results underline the need to clarify goals, specify norms about work and member roles in organizations and determine the deleterious effect of hindrance demands even in engaged workers.     

Relationship of social rank in mice to growth,endurance, and fertility

The influence of the social rank of male mice, determined by the outcome of fights, was assessed on their growth, treadmill performance, open-field behavior, and morphometric traits. Fertility of mated females was also investigated. Special attention was paid to the relationship between the male's social rank and body weight. Winners of fights were heavier than losers; their latencies were shorter, and they showed more locomotor activity in an open field test. Winners also had higher absolute testicular and epididymal weights. These males had a positive influence on the reproductive fitness of the females with which they were mated.