Internet use in the contemporary media environment

Although a significant amount of research has focused on traditional media choice and use, and even on some ‘new’ media, these studies have either neglected the Internet and World Wide Web or were conducted prior to their recent popularity. This study offers a novel exploration of individuals' use of three Internet functions (information retrieval, information giving, and conversation capabilities) in the context of the use of other communication media. Data from 684 individuals demonstrate that the Internet is a multidimensional technology used in a manner similar to other, more traditional media. Specifically, conversation features of the Internet align with mediated interpersonal technologies (the telephone and electronic mail), whereas the Internet's information‐retrieval and information‐giving features are used in ways similar to mass media channels (newspapers, television, and books and magazines). In addition, needs fulfilled by these channels cluster in ways consistent with past research, regardless of the technologies employed to meet them.     

In Vivo Hippocampal Acetylcholine Release During Exposure to Acute Stress

Hippocampal extracellular acetylcholine (ACh) and choline levels were evaluated using in vivo microdialysis in male Fischer 344 rats before, during, and following an 80-min exposure to two different stress conditions. Measurements were taken in rats restrained and immersed in a water bath containing either 37 degreesC (normothermic-restraint) or 20 degreesC (cold-restraint) water. Results were compared to normothermic-freely-moving rats. Cold-restrained rats displayed decreased ACh levels during cold exposure relative to both normothermic-restrained and normothermic-freely-moving rats. By the end of the cold exposure period and following removal from cold, ACh levels had returned to near-baseline values. Normothermic-restrained rats had levels similar to those of normothermic-freely-moving rats, except for a marked increase in ACh following removal from restraint. Cold-restrained rats displayed a gradual elevation in choline levels during cold stress, followed by a gradual decline after stress termination, whereas both normothermic-restrained and normothermic-freely-moving rats displayed gradual decreases during the microdialysis session. These findings demonstrate that central cholinergic neurotransmission can be altered by the application of, and removal from, acute stressors. In addition, the results suggest a possible relationship between the magnitudes of both the stressor and its cholinergic consequences.     

Clamped Corticosterone (B) Reveals the Effect of Endogenous B on Both Facilitated Responsivity to Acute Restraint and Metabolic Responses to Chronic Stress

To determine the effects of both corticosterone (B) and chronic stressors on acute ACTH responses to restraint, young male rats were exposed to streptozotocin-induced diabetes, cold (5-7 degreesC) or intracerebroventricular (icv) neuropeptide Y (NPY) for 5 d and then exposed to restraint within 2 h after lights on. Two groups of rats were studied: intact and adrenalectomized replaced with B pellets that maintained plasma B in the normal mean 24-h range of intact rats. In addition to ACTH and B responses to restraint on d 5, body weight, food intake, fat depots, glucose and other hormones were measured to determine the role of stress-induced elevations in B on energy balance. ACTH responses to restraint were normal in intact rats subjected to diabetes or cold. By contrast, there was no ACTH or B response to restraint in NPY-infused intact rats. All 3 groups of chronically stimulated adrenalectomized rats with clamped B had facilitated ACTH responses to restraint compared to their treatment controls. Overall food intake increased in all groups of stressed rats; however, augmented intake occurred only during the light in intact rats and equally in the light and dark in B-clamped rats. White adipose depot weights were decreased by both diabetes and cold and increased by NPY in intact rats; the decreases with cold and increases with NPY were both blunted and changes in fat stores were not significant in adrenalectomized, B-clamped rats. We conclude that: 1. diabetes- and cold-induced facilitation of restraint-induced afferent input to hypothalamic control of the hypothalamo-pituitary-adrenal (HPA) axis is opposed in intact rats by the elevated feedback signal of B secretion; 2. NPY does not induce facilitation of afferent stress pathways; 3. chronic stimulation of the HPA axis induces acute hyperresponsiveness of hypothalamic neurons to restraint provided that the afferent input of this acute stimulus is not prevented by B feedback; 4. stimulus-induced elevations in B secretion result in day-time feeding; 5. insensitivity of both caloric efficiency and white fat stores to chronic stress in adrenalectomized, B-clamped rats results from loss of normally variable B levels.     

Intercultural Study of Personal Space: A Case Study

The study of intercultural differences in personal space attempts to identify factors that could be helpful in guiding people from different cultures to live and work together in international ventures. The objective of this research was to measure interpersonal distance in a cross-cultural environment. Twenty-three participants classified in 4 cultural groups answered an 11-questions interview where the personal distance and orientation between seated interactants were measured. Results showed that Anglo Saxons used the largest zone of personal space, followed by Asians, then Caucasians, and, as expected, Mediterraneans and Latinos used the shortest distance. Where Latinos adopt a face-to-face position, Caucasians tend to orient themselves to the side of the interviewer, which has an impact on interpersonal communication.     

Work Context Support and Portuguese Soldiers’ Well-Being: The Mediating Role of Autonomous Motivation

Using self-determination theory ( Deci & Ryan, 2008 Deci, E. L., & Ryan, R. M. (2008). Self-determination theory: A macrotheory of human motivation, development, and health. Canadian Psychology, 49, 182–185. 10.1037/a0012801[Crossref], [Web of Science ®] , [Google Scholar]) as the theoretical framework, we tested a model for this study that considers soldiers’ perceptions of organizational support and leader–member exchange (LMX), work motivation, and well-being at work. The hypothesized model was tested using a representative sample of 1,045 Portuguese soldiers. Results revealed that autonomous work motivation was significantly related to both contextual factors (organizational support and LMX). In addition, autonomous work motivation was positively related to work engagement and negatively related to burnout, and controlled motivation showed the opposite pattern. More interesting, the results showed that autonomous work motivation as a mechanism that helped to explain the relationship between both contextual factors and workplace well-being. The present results underscore the importance of understanding the mechanisms through which higher work engagement and lower burnout take place, eventually leading to appropriate interventions.     

The high-performance work system and commitment of the Portuguese Navy personnel

This study evaluates the relationship between the high-performance work system (HPWS) as perceived by the Portuguese Navy military and their affective (AC), normative (NC), and continuance commitment (CC). The sample is representative and composed of 1,003 individuals (officers, warrant/petty officers, and seamen—as a reference, these last two categories are called ratings in the British Royal Navy, and enlisted in the United States Navy) from different naval units. A structural models analysis was carried out, and the results showed, as expected, that the perception of an HPWS was positively related to the commitment of the military personnel, in both its affective and normative dimensions. Nevertheless, contrary to our expectations, we also observed that the perception of an HPWS was positively related to the continuance commitment as well. On the other hand, we examined the moderator role played by the professional category—the relationship between the perception of the HPWS and the AC was stronger in commissioned officers and seamen than in warrant and petty officers—and by the contractual relationship. In the latter, the relationship between the HPWS and the AC and the CC was stronger in the individuals having a fixed-term contract than in those with a permanent position. The theoretical and practical implications of these results will be discussed.     

Perceptions of employment relations and permanence in the organization: mediating effects of affective commitment in relations of psychological contract and intention to quit

Working conditions in call/contact centers influence employees' perceptions of their relations with the organization and their attitudes to work. Such perceptions can be analyzed through the psychological contract. The association between the relational/transactional orientation of the psychological contract and intention to quit the organization was examined, as well as the mediating role of affective commitment in employment relations. Data were collected from 973 employees in a cross-sectional survey. Analysis confirmed that there was a statistically significant relation between the orientation of the psychological contract and intention to quit, which was positive for transactionally oriented and negative for relationally oriented contracts. A mediating role for affective commitment was also confirmed, and a full mediating effect was reported for both orientations.     

Different temporary work status, different behaviors in organization

This study examined the contributions of the psychological contract framework to an understanding of the effects of different work statuses on employees’ behavior. We compared temporary firm workers (n=71) with core workers (n=268) and direct-hire temporary workers (n=149) with core workers (n=42) in two different samples. As expected, temporary firm workers consider that they receive fewer socio-emotional inducements from the organization they work for (opportunities for promotion, career development, long-term employment), but direct-hire temporary workers who succeeded in having their contracts extended had a psychological contract in which socio-emotional components predominated. A psychological contract with a predominance of socio-emotional components was important for organizations because it mediated the influence of work status on civic virtue behaviors on the part of temporary firm workers, and directly and positively influenced these behaviors in direct-hired temporary workers (behaviors as assessed by their supervisors). Contrary to the hypothesis, psychological contract had a direct and positive influence on the in-role behavior of direct-hire temporary workers. The implications of the findings for psychological contract research are discussed.     

Stress in Academic Life: Work Characteristics as Predictors of Student Well-being and Performance

La relation entre les caractéristiques du travail, le bien-être des étudiants et la performance a étéévaluée à partir du modèle de Karasck & Theorell ≪Travail, exigences, contrôle, soutien≫ (1990). Un échantillon d'étudiants portugais ( N = 825) a répondu à un questionnaire comprenant des mesures du contrôle et des exigences du travail universitaire, du soutien des pairs, de la satisfaction relative à la vie universitaire, de l'anxiété/dépression et des résultats aux examens. Il apparut, comme dans d'aures contextes de travail, que la satisfaction des étudiants pour ce qui est de la vie universitaire, ainsi que les niveaux d'anxiété/dépression étaient fortement dépendants de leur perception des caractéristiques du travail. Les niveaux de satisfaction ont un effet direct sur la performance et agissent sur la relation entre la maîtrise du travail universitaire et la performance.
The relationship between work characteristics, student well-being and performance was assessed, based upon Karasek and Theorell's (1990 ) Job Demands–Control–Support model. A sample of Portuguese university students ( N = 825) answered a questionnaire comprising measures of academic work demands and control, peer support, satisfaction with academic life, anxiety/depression and academic performance. Results suggested that, similar to other work contexts, student satisfaction with academic life and anxiety/depression levels are strongly dependent on their perceptions of work characteristics. Levels of satisfaction have a direct impact on student performance and mediate the relationship between academic work control and performance.     

Breach of Psychological Contract and the Development of Burnout and Engagement: A Longitudinal Study Among Soldiers on a Peacekeeping Mission

We assumed that a breach in psychological contract had an effect on soldiers' well-being and not only promoted their burnout levels but decreased their levels of engagement. In a longitudinal study with 387 individuals on a peacekeeping mission, we analyzed the impact of the noncompliance of Army obligations in this mission on the burnout and engagement of soldiers. We found that during the mission their levels of burnout increased, whereas their engagement levels dropped. At the end of the mission, however, this breach in psychological contract did not influence their burnout levels, in spite of a continued reduction in the soldiers' engagement. Theoretical and practical implications are discussed and limitations and suggestions for future research are presented.