Updating mental models in predictive reasoning

Abstract

A mental model account for predictive judgement is proposed. According to this view, solving a predictive task involves the foundation ad updating of a mental he work as the relevant data are provided. The final model state determines the subject's predictive outcome. Two experiments examine the temporal course of reasoning in novices (Experiment 1) and experts (Experiment 2). Each task provided in succession a quantitative source (e.g. “Last year, of the vehidts that stopped at the cafe, 80% were cars and 20% were trucks”), a diagnostic source (e.g. “This vehide is mksy”) and a categorical choice (e.g. “What kind of vehicle was it?”). Two factors were manipulated: The order of sources aimed at analysing the contextual dependence of the updating processes, and the between-sources congruence (congruent or incongruent) in order to explore the integrative processes in model building. The pattern of the sources reading times, the choice times and the categorical choices suggested that: (1) the processing of a source depends on the previous one, (2) subjects try to integrste both sources into a single mental framework, and (3) experts and novices have a similar performance, although experts give more importance to the quantitative source in the diagnostic-quantitative order. These results are better accounted for by the mental model framework than both the heuristic and the formal view of prediction.     

Conditioned and unconditioned fear organized in the periaqueductal gray are differentially sensitive to injections of muscimol into amygdaloid nuclei

The lateral and basolateral nuclei of the amygdala (LaA and BLA, respectively) serve as a filter for unconditioned and conditioned aversive information that ascends to higher structures from the brainstem, whereas the central nucleus of the amygdala (CeA) is considered to be the main output for the defense reaction. It has been shown that the dorsal periaqueductal gray (dPAG) is activated by threatening stimuli and has important functional links with the amygdala through two-way anatomical connections. In this work, we examined the influence of chemical inactivation of these nuclei of amygdala on the freezing and escape responses induced by electrical stimulation through electrodes implanted in the dPAG of Wistar rats. Each rat also bore a cannula implanted in the LaA, BLA or CeA for injections of muscimol (0.5 microg/0.5 microL) or its vehicle. The duration of freezing behavior that outlasts electrical stimulation of the dPAG was also measured. On the following day, these animals were submitted to a contextual fear-conditioning using foot shocks as unconditioned stimulus. Conditioned freezing to contextual cues previously associated with foot shocks was also inhibited by injections of muscimol into these amygdaloid nuclei. The contextual conditioned freezing behavior is generated in the neural circuits of conditioned fear in the amygdala. The data obtained also show that injections of muscimol into the three amygdaloid nuclei did not change the aversive threshold of freezing, but disrupted the dPAG post-stimulation freezing. Previous findings that the latter freezing results directly from dPAG stimulation and that it is not sensitive to a context shift suggest that it is unconditioned in nature. Thus, the amygdala can affect some, but not all, aspects of unconditioned freezing. Post-stimulation freezing may reflect the process of transferring aversive information from dPAG to higher brain structures.     

Aha over Haha: Brands benefit more from being clever than from being funny

We examine whether the cleverness of a brand's humor attempt affects consumers' brand attitudes and engagement. A clever humor attempt is any humor attempt wherein the consumer feels she must make mental connections to solve the joke (e.g., understand a cultural reference, understand the dual meaning of a pun). Across five studies, we demonstrate that as the cleverness of a humor attempt increases, consumers report higher brand attitudes and are more engaged with the brand. This effect is mediated by perceptions of brand warmth and competence and moderated by consumers' need for cognition.     

Building reciprocity: From safety‐net to social transformation programmes

Topics of societal concern such as mental health and poverty reduction increasingly require action programmes that operate within broad psychosocial and social justice perspectives. Models of practice centred in individual needs, although important, are not powerful enough to bring about social change when they operate in isolation. In this article, we present the findings resulting from the observation of programmes engaged in collaborating with socio‐economically disadvantaged individuals, families, and communities. The programmes selected for study were nationally or internationally recognized for the quality and innovation of their methodologies or for having been subjected to scientific attention; some met both criteria. Altogether, 15 programmes were visited, in North and South America and Europe. Through a grounded theory methodology, the processes of data collection and analysis led to the development of a theoretical framework that identifies a continuum of programmes aimed at supporting the development of individuals, families, and communities and that has at its core the central process of building reciprocity. This article presents and describes the continuum of programmes and how each type relates to the process of building reciprocity and establishes links with other relevant and significant concepts in the framework. Finally, implications for further research are explored.     

Innovative Moments as Developmental Change Levels: A Case Study on Meaning Integration in the Treatment of Depression

Innovative moments are alternative meanings to the problems expressed by clients and are organized into three levels. This study analyzes if these levels are not only change markers related to symptomatology outcomes, but also gradual steps in meaning development. A thematic analysis was carried out in a case of depression treated with narrative therapy. Results revealed three themes that evolved from level 1 to level 3. Levels 1 and 2 corresponded to one specific theme and almost all level 3 integrated different themes (polythematic). Level 3 innovative moments might be an integrative bridge allowing the construction of a more adaptive meaning framework.     

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.     

Perceived neighborhood environments and physical activity in an elderly sample

Increasing evidence indicates the importance of environmental variables in explaining physical activity. This study evaluated sex differences in perception of home and neighborhood environmental support and assessed which neighborhood environmental variables were associated with reported physical activity of elderly people. A sample of 126 women (M age = 79.1 +/- 6.6 yr.) and 55 men (M age = 76.6 +/- 7.7 yr.) were healthy, community-dwelling individuals. A questionnaire about environmental variables was administered. Physical activity was assessed on the Baecke Questionnaire. Logistic regression analysis showed that Neighborhood Safety was related to total physical activity, activity in leisure time, and sport activities. Men were also likely to be more active in leisure time than women. Neighborhood Personal Safety was associated with physical activity of these elderly people, showing a potential influence of the environmental domain in physical activity.     

Effects of pre-exposure to the same or different pattern of extra-maze cues on subsequent extra-maze discrimination

In two experiments, rats learned a spatial discrimination between maze arms defined by their relationship to a variety of extra-maze cues. Prior exposure to the actual arms between which animals were required to discriminate tended to retard subsequent learning (by comparison with a control group either given no pre-exposure to the extra-maze cues or exposed only to arms pointing in the opposite direction), whereas prior exposure to arms intermediate between those used in discrimination training tended to facilitate subsequent learning. These results are consistent with the suggestion that pre-exposure will facilitate discrimination learning when it reduces the associability of features or elements common to the stimuli between which animals are required to discriminate, more than it reduces the associability of the features or elements unique to each.     

A Rare Kind of Light at the End of a Rare Kind of Tunnel: Trauma of a Life-Altering,Chronic, Degenerative Disease and Its Redemption

Multiple sclerosis is a chronic, degenerative neurological disease that traumatizes and retraumatizes victims. As a result of the absence of a human perpetrator and collectivity of experience, this trauma tends to be highly internalized. The trajectory of the disease ultimately results in absolute disillusionment in all systems that sustain life. While recovery might not be possible in the face of a degenerative, chronic illness, the patient may be able to find redemption by focusing on greater truths and little joys, which in turn could place him or her on a higher plane.     

Contemporary patterns of career construction of a group of urban workers in São Paulo (Brazil)

By means of a qualitative approach, this study sought to understand the patterns of career construction in contemporary times through content analysis of the narratives generated by a set of 40 urban workers in São Paulo (Brazil), intentionally selected. Five narrative patterns of career construction were found and related to the existing concepts (organizational career, protean and boundaryless career, professional career, transitional career, and hybrid careers), which were respectively described by their core feature (nostalgia, possibility, enclosure, instrumentality, and hybrid). The main results showed that one quarter of participants sought career stability, continuity, and linearity (Nostalgia), one quarter sought flexibility and discontinuity (Possibility), about 1/7 sought a career based on the profession/occupation (Enclosure), about one-third constructed hybrid career narratives, and there was a frequent emergence of crises (Instrumentality). The main contribution of this study was confirming the hybrid nature of contemporary career constructions produced in a constant tension between stability and flexibility, as well as between permanence and change; nevertheless, based on collective standards.