Effects of acute,subchronic and intermittent MDMA (‘ECSTASY’) administration on agonistic interactions between male mice

Recent studies suggest that acute administration of 3,4‐methylenedioxymethamphetamine (MDMA), an amphetamine derivative popularly known as “ecstasy,” produces an antiaggressive effect in male mice. However, there is no evidence with respect to the development of tolerance or sensitization after its subchronic or intermittent administration. In this study, we examined the action of low to moderate doses of MDMA (1.25, 2.5 and 5 mg/kg, i.p), administered acutely, subchronically (for 7 days) or intermittently, on agonistic behavior elicited by isolation in male mice. Individually housed mice were exposed to anosmic “standard opponents” 30 minutes after the drug administration, and the encounters were videotaped and evaluated using an ethologically based analysis. Acute treatment with MDMA provoked a significant reduction of aggressive behaviors, without altering immobility. However, this action was only selective at 1.25 mg/kg. With the intermediate (2.5 mg/kg) and the highest doses (5 mg/kg) of the drug, it was observed a significant decrease of offensive behaviors, accompanied by an increase of exploration from a distance, avoidance/flee and defense/submission behaviors. This ethopharmacological profile could indicate the existence of an anxiogenic‐like effect of MDMA. The overall picture of the effects of MDMA was very similar in the acutely, intermittently and daily treated animals. No tolerance or sensitization to the actions of the drug was developed after its repeated or intermittent administration.     

Visual short-term memory operates more efficiently on boundary features than on surface features

A change detection task was used to estimate the visual short-term memory storage capacity for either the orientation or the size of objects. On each trial, several,objects were briefly presented, followed by a blank interval and then by a second display of objects that either was identical to the first display or had a single object that was different (the object changed either orientation or size, in separate experiments). The task was to indicate whether the two displays were the same or different, and the number of objects remembered was estimated from the percent correct on this task. Storage capacity for a feature was nearly twice as large when that feature was defined by the object boundary, rather than by the surface texture of the object. This dramatic difference in storage capacity suggests that a particular feature (e.g., right tilted or small) is not stored in memory with an invariant abstract code. Instead, there appear to be different codes for the boundary and surface features of objects, and memory operates on boundary features more efficiently than it operates on surface features.     

Gender differences in alcohol dependence: personality variables, psychopathological profile and personality disorders

In this paper, gender differences in personality, psychopathology and personality disorders of alcohol-dependent patients are described. The sample consisted of 158 alcohol-dependent patients attending a psychiatric outpatient clinic (105 men and 55 women). All participants were assessed with various assessment tools related to personality (Impulsiveness Scale, Sensation Seeking Scale and STAI), psychopathology (SCL-90-R, BDI and Inadaptation Scale) and personality disorders (IPDE). There were no differences in personality variables, but the women had more anxiety and depressive symptoms and also more problems to adapt to everyday life than did the men. Personality disorders were not as prevalent as in the case of men, and the most frequent among women were obsessive-compulsive, dependent and histrionic personality disorders. Implications of this study for further research are commented on.     

Functioning of integration in Secondary School according to the teachers' perception

The main purpose of this article is to analyse integration in Compulsory Secondary School and the variables that teachers perceive as its indicators. More specifically, we wished to determine teachers' experience, their perceptions of integration students' achievement, participation, acceptance and involvement, and their appraisal of various measures in order to improve integration. Various preferred means of schooling and teachers' perception of the functioning of integration are analysed with a Likert-scaled questionnaire made up of 114 items. The sample comprised 242 secondary education teachers. The results show that the most poorly integrated group of students had behavioural problems and that a significant percentage of the teachers would prefer not to have these students in their classrooms. According to the teachers, integration does not work effectively with some groups of students, mainly due to the lack of resources and adequate strategies.     

Computerized hypertextual strategy and personal construction of meaning

The aim of this study is to provide information about the effects of strategic training in the area of social sciences (1) on the real level, as well as perceived competence in terms of the students' skills to select, organise and produce information; and (2) on their attitude and motivation towards working in this area of the curriculum. 107 students took part in this study, 57 of whom were the control group and 50 the experimental one. They were all enrolled in the third year of secondary school (9th year). The teachers and students who took part in this experience followed an on-line course to manage the strategy for approximately three months. Subsequently, the teacher introduced the tool in class, applying it both from a conceptual and a procedural point of view. The results show that the strategic training implemented in this study greatly improved written understanding procedures (both literal and inferential), increased perceived competence to manage internal information (selection, organization, and elaboration), and generated positive changes in terms of students' attitude and motivation towards working in the area of social sciences.     

Emotional autonomy and adjustment among emerging adults: The moderating role of family relationships

Emerging adults build their personal maturity within the family context; however, few studies focus on the role of emotional autonomy during this stage. The aim of this study was to analyze the relationship between emotional autonomy and adjustment during emerging adulthood, bearing in mind the possible moderating role of parental support in this relationship. Data were collected from 1,502 Spanish undergraduate students (903 women) aged between 18 and 29. Participants completed measures of emotional autonomy (EAS, Steinberg & Silverberg, 1986), family social support (MSPSS; Zimet, Dahlem, Zimet & Farley, 1988), psychological well-being (PWBS; Ryff, Lee, Essex & Schmutte, 1995) and psychological distress (DASS-21; Lovibond & Lovibond, 1995). The results indicate that emotional autonomy correlates negatively with family support and psychological well-being and positively with psychological distress. However, only when young people perceive a family context with low social support is gaining emotional distance from their parents associated with an increase in their psychological well-being. Our findings highlight the crucial role that the family environment plays in well-being during young adulthood, and reveal that the effect of emotional distancing from parents on adjustment depends on the quality of the family climate. Future research should seek to gain greater insight into emotional autonomy during emerging adulthood, taking into account cross-cultural diversity.     

Cleaning versus replacement in power plant air preheaters: a comparison between deterministic and stochastic goal programming models

Power plants lose efficiency when the air preheater elements are not replaced or cleaned as they deteriorate. Replacing is more expensive than cleaning but more secure to preserve power and lifetime. How many baskets should be then replaced and how many cleaned to achieve ‘satisficing’ goals of cost, power and lifetime? We design deterministic/stochastic goal programming approaches to this problem and develop a decision case for usual preheaters. Some discrepancies in results between both approaches appear, the deterministic model advising to replace less baskets than the stochastic, which is plausible due to the risk variable. Copyright © 2005 John Wiley & Sons, Ltd.     

Twenty‐two years of psychological science in Psychological Science

The journal Psychological Science (PS) has undergone various changes over 22 years since its birth in 1990. Analysis of Web of Science's records shows that the publication has increased in volume and collaborations between authors, and has become more international. Keyword analysis suggests the new role of neuroscience in contemporary psychology and indicates that the PS of today is more oriented than in the 1990s towards psychosocial and emotional issues as well as natural situations in our daily lives (ecological validity).