Serotonin blockade delays learning performance in a cooperative fish

Animals use learning and memorizing to gather information that will help them to make ecologically relevant decisions. Neuro-modulatory adjustments enable them to make associations between stimuli and appropriate behavior. A key candidate for the modulation of cooperative behavior is serotonin. Previous research has shown that modulation of the serotonergic system spontaneously affects the behavior of the cleaner wrasse Labroides dimidiatus during interactions with so-called ‘client’ reef fish. Here, we asked whether shifts in serotonin function affect the cleaners’ associative learning abilities when faced with the task to distinguish two artificial clients that differ in their value as a food source. We found that the administration of serotonin 1A receptor antagonist significantly slowed learning speed in comparison with saline treated fish. As reduced serotonergic signaling typically enhances fear, we discuss the possibility that serotonin may affect how cleaners appraise, acquire information and respond to client-derived stimuli via manipulation of the perception of danger.     

Sense of Competence and Beliefs About Parental Roles in Mothers and Fathers as Predictors of Coparenting and Child Engagement in Mother–Father–Infant Triadic Interactions

The aim of this study was to assess the extent to which a sense of competence and beliefs about parental roles in mothers and fathers influence coparenting and child engagement in triadic interactions during the first 2 years of the child's life, after other influential variables such as marital satisfaction and postpartum depression have been controlled for. The sample constituted 69 mother–father–infant families, whose sense of competence, beliefs in parental roles, postpartum depression, and marital satisfaction were assessed in our laboratory at 3, 9, and 18 months with self‐reported questionnaires. Coparenting support and conflict and child engagement were assessed with the Lausanne Trilogue Play. Results show that (i) predictors of coparenting and child engagement are not the same at each time point; (ii) a sense of competence in mothers is positively linked with coparenting support, particularly at 3 months, whereas in fathers, it is negatively linked with support, particularly at 18 months; (iii) discrepancies between mothers and fathers in beliefs about the importance of the mother's role is the main predictor of coparenting conflict at 18 months; and (iv) paternal beliefs about the importance of the father's and mother's roles are the main predictor of child engagement at 18 months. Copyright © 2015 John Wiley & Sons, Ltd.     

Characterising the Personality of the Public Safety Offender and Non‐offender using Decision Trees: The Case of Colombia

The aim of this paper was to create a decision tree (DT) to identify personality profiles of offenders against public safety. A technique meeting this requirement was proposed that uses the C4.5 algorithm to derive decision rules for personality profiling of public safety offenders. The Mini‐Mult test was used to measure the personality profiles of 238 individuals. With the test results as our database, a C4.5 DT was applied to construct rules that classify each profile into one of two groups, those without and those with records of offences against public safety. The model correctly classified 80% of the personality profiles and delivered a set of decision rules for distinguishing the profiles by group, and the principal personality profiles were interpreted. We conclude that DTs are a promising technique for analysing personality profiles by their offender or non‐offender status. Finally, we believe that the development of a classifying model using DT may have practical applications in the Colombian prison system. Copyright © 2016 John Wiley & Sons, Ltd.     

Discrimination of Lexical Tones in the First Year of Life

In the current study, we examined the developmental course of the perception of non‐native tonal contrast. We tested 4, 6 and 12‐month‐old Dutch infants on their discrimination of Chinese low‐rising tone and low‐dipping tone using the visual fixation paradigm. The infants were tested in two conditions that differed in terms of degree of variability. The 4‐month‐olds did not show discrimination effect in either condition. The 6‐ and 12‐month‐old infants, however, discriminated the tones in both conditions. The improvement of perception might be the result of cognitive development carried over from learning the native phonology. Infants can become better listeners in general in the first year of life, as well as get cognitively better equipped in dealing with the variable input in speech in general. Copyright © 2015 John Wiley & Sons, Ltd.     

Do Pro-environmental Behaviors and Awareness Contribute to Improve Subjective Well-being?

In this paper, we study the influence of both environmental awareness and behaviors on subjective well-being (SWB). By using ordered logit techniques in a sample from Granada, a city in southern Spain, we find that concern about the environment and voluntary work actions to preserve it are relevant for SWB. When both are combined, namely when a person is concerned and volunteers, the influence on SWB is greater. These results introduce the SWB dimension in the knowledge-concern-action paradox, which states that even if the individual is concerned about the environment, this concern does not always translate into personal action to preserve it. Actions such as habits related to water saving inside the household are not significant in explaining SWB, but using devices that save water increases it. In summary, our results suggest that actions and awareness have either a positive or no significant influence on SWB, but never a negative influence.     

Joan as Jesus: A Feminist Theological Analysis of Dreyer's The Passion of Joan of Arc

The aim of this article is to explore Carl Theodor Dreyer's portrayal of Joan of Arc in his film The Passion of Joan of Arc (1928) as a female Christ‐figure. At the same time I argue that the film can serve as an important dialogue partner in ongoing christological discourse. The conclusion is that Dreyer's Joan provides a vivid image of Jesus Christ that challenges our fixation on Jesus’ maleness, and helps us to understand better what we really mean when we claim that God, dressed in flesh, became human, like us, female or male.     

Feedback on health status and peer popularity influences social risk decision-making processes in adolescents and young adults

Cognitive and dual-processes models, involving cognitive and socio-emotional components, for adolescents’ risky behaviour have been proposed. This study tested their predictions by manipulating the presence or absence of feedback about gains and losses in health and peer popularity in a decision-making task with peers. Risky (e.g., taking or refusing a drug) and ambiguous decisions (e.g., eating hamburger or hotdog) were examined in 256 adolescents (aged 13–14; 15–16; 17–18) and young adults (aged 19–20). Participants made more risky choices and required less decision time when receiving feedback about the negative consequences on health and positive consequences on peer popularity. Decision times were comparatively larger for risky than for safe options in late adolescence and young adulthood. Results supported the dual-processes model showing that, though late cognitive changes were observed that could eventually lead to the selection of safe options, feedback gains in peer popularity outweighed unhealthy consequences leading to risky decisions.     

Enhanced encoding of the co-actor's target stimuli during a shared non-motor task

Task co-representation has been proposed to rely on the motor brain areas’ capacity to represent others’ action plans similarly to one's own. The joint memory (JM) effect suggests that working in parallel with others influences the depth of incidental encoding: Other-relevant items are better encoded than non-task-relevant items. Using this paradigm, we investigated whether task co-representation could also emerge for non-motor tasks. In Experiment 1, we found enhanced recall performance to stimuli relevant to the co-actor also when the participants’ task required non-motor responses (counting the target words) instead of key-presses. This suggests that the JM effect did not depend on simulating the co-actor's motor responses. In Experiment 2, direct visual access to the co-actor and his actions was found to be unnecessary to evoke the JM effect in case of the non-motor, but not in case of the motor task. Prior knowledge of the co-actor's target category is sufficient to evoke deeper incidental encoding. Overall, these findings indicate that the capacity of task co-representation extends beyond the realm of motor tasks: Simulating the other's motor actions is not necessary in this process.