What does a motorcyclist look at while driving at urban arterials?

To design adequate measures for enhancing riders' safety, a necessary first step is to understand the riders' visual scanning strategies under different traffic conditions. This paper presents the preliminary analysis of eye tracking data collected by three riders in the Athens metropolitan area, riding along urban arterial motorways and along an undivided urban road. Apart from the fixation duration and location, the fixated road elements and specific objects were annotated and analysed. The mean duration of fixations was found to be higher on urban roads than on motorways for all traffic densities. Riding in the condition of restricted flow seems to be more demanding for the riders, since the mean duration of fixations was higher in restricted flow than in free or congested flow on motorway and also higher than in free flow on urban road. The riders' fixation locations differed between motorway and urban road, especially in the vertical plane. The analysis of fixated road elements and specific objects indicates the specific points of interest of riders in each case. Although results should be validated with data from more riders, they provide hints on direction of future research efforts to enhance riders' safety in urban environments.     

Naturalistic observation of drivers' interactions while overtaking on an undivided road

Current models of driving behavior and designs of driver support systems are not taking adequately into account the interactions between drivers. Although a driver's intended maneuver may not be physically possible at a specific time point, it may still be safely executed if the driver's intention is successfully communicated to and interpreted by another driver, who alters the own future trajectory so as to enable the maneuver execution. This paper presents some empirical findings relevant to communicative and cooperative interactions between drivers along naturalistic overtaking maneuvers on an undivided road. The cues used by drivers to interpret other drivers' intention and the drivers' interactions were extracted through video observations of the maneuvers together with the frequency of such interactions per level of traffic risk. The findings show that drivers use formal and informal cues to anticipate other drivers' intention. A significant percentage of maneuvers were performed after facilitation by other drivers. Future studies should focus on this phenomenon while future models of driving behavior should incorporate communicative and cooperative interactions among drivers, so as to design adequate cooperative support systems to enhance road safety.     

Decomposing the predictive performance of the moving average trading rule of technical analysis: the contribution of linear and non-linear dependencies in stock returns

The main purpose of this work is to decompose the predictive performance of the moving average (MA) trading rule and find out the portion that could be attributed to the possible exploitation of linear and non-linear dependencies in stock returns. Data from the General Index of the Athens Stock Exchange, from the Standard and Poor-500 Index of the New York Stock Exchange and from the Austrian Traded Index of the Vienna Stock Exchange are filtered by linear filters so as the resulting simulated ‘returns’ exhibit no serial correlation. Applying MA trading rules to both the original and the simulated indices and using a new statistical testing procedure that takes into account the sensitivity of the performance of the trading rule as a function of the length of the MA it is found that the predictive performance of the trading rule is clearly weakened when applied to the simulated indices indicating that a substantial part of the rule's predictive performance is due to the exploitation of linear dependencies in stock returns. This weakening is uneven; in general the shorter the MA length the more pronounced the attenuation.     

From social workers to socio-therapists: the transformative journey of substance abuse therapists

ABSTRACT

The efficiency of interventions in addiction is associated with the processes of practitioners’ professional development. Identity formation is studied extensively for clinical professions but little research focuses on social workers working in addiction settings. This study examined the experience of social workers working in a community treatment network in Greece. Fifteen interviews were conducted with 11 women and 4 men, ranging between 29 and 47 years οf age, who worked in different centers within the network. Data were analyzed following the guidelines of Interpretative Phenomenological Analysis, offering in-depth examinations of people’s lived experience. The results delineate a series of transformations in professional identity comprising a process of biographization. The participants highlighted intrapersonal and relational factors that influence this process which leads to self-understanding and engagement with the therapeutic community. The results contribute to deciphering the factors that influence social workers’ experience in their professional identity formation in substance abuse treatment contexts.     

Demographic transition and economic growth: Empirical evidence from Greece

Over the past decades, due to a combination of declining fertility rates and rising life expectancies, most industrialized countries have experienced aging populations and low numbers of young populations that may pose economic problems in the future. This paper investigates the relationship first between fertility rate and infant mortality rate and second among demographic changes, real wages and real output in Greece over the period 1960–96. When we control for fluctuations in overall economic activity and the labor market on the bivariate relationship between fertility and mortality rates, the evidence suggests that Granger-causation must exist in at least one direction. The results show that in the long run a decrease in infant mortality rates, taking into consideration economic performance and the labor market, causes a reduction in fertility rates. Also, employing the vector error-correction models, the variance decomposition analysis and the impulse response functions, the empirical results support the endogeneity of fertility choice to infant mortality, the labor market and the growth process. Received: 16 May 1999/Accepted: 18 September 2000     

Work-self balance: A longitudinal study on the effects of job demands and resources on personal functioning in Japanese working parents

Abstract

In work-family research the effects on the individual, or the “self”, in terms of personal interests independent of the work and family domains, have been largely neglected. This longitudinal study on 471 Japanese employees with young children investigated how job demands and job resources may have an impact on well-being by facilitating or hindering personal functioning. It was hypothesized that workload would have an unfavourable impact on work-to-self conflict, while supervisor support would have a favourable impact on work-to-self facilitation. In addition, we hypothesized that work–self conflict would diminish well-being (psychological distress and happiness), while work–self facilitation would enhance well-being over time. Structural equation modelling analyses using a full panel design showed that work overload was positively related to work–self conflict over time, whereas supervisor support was positively related to work–self facilitation. Furthermore, work–self conflict predicted psychological distress and happiness at T2, one year later, after controlling for T1 levels. These findings suggest that the demands and resources encountered at work can spill over to the home domain and have an impact on personal functioning and context-free well-being. Further research is needed to determine the importance of work-self constructs in relation to work-family constructs.     

How feeling happy during off-job activities helps successful recovery from work: A day reconstruction study

This diary study builds on the effort-recovery and broaden-and-build theories to examine whether the subjective experience of off-job activities (work-related, household, social, physical, low-effort) matters for an individual's daily recovery from work. It was hypothesized that momentary happiness experienced during off-job activities stops the prolongation of load reactions from work-related effort, and builds personal resources that benefit daily recovery from work. Using a day reconstruction method, 384 participants recruited via a Dutch website reconstructed their time spent on, and happiness during, off-job activities, and their daily recovery on workdays over a two-week period. Results of hierarchical linear modelling showed that work-related and household activities during off-job time were negatively associated with recovery at bedtime when happiness during such activities was low, but not when happiness was high. Social and physical activities were associated positively with recovery when happiness during such activities was high, but negatively when happiness was low, indicating that such activities only aid recovery when they are enjoyed. The findings expand knowledge on recovery by showing that it is not just the time spent on off-work activities but the subjective experience of such activities that plays a pivotal role in the way they are linked to recovery.     

The construct validity of an alternative measure of burnout: Investigating the English translation of the Oldenburg Burnout Inventory

While the most commonly employed burnout measure has been the Maslach Burnout Inventory (MBI), researchers have been troubled by some of the psychometric limitations of that scale (e.g. wording of the scale items) as well as the limited conceptualization of burnout upon which it is based. As a result, Demerouti et al. have developed an alternative measure of burnout, the Oldenburg Burnout Inventory (OLBI). The purpose of this paper is to develop evidence for the validity and reliability of an English-language translation of the OLBI. As such, this study is among the first validation studies of the OLBI, and the first to assess the characteristics of the OLBI an English-speaking sample. Using data from 2599 employees across two samples from the United States (a generalized sample of working adults and a sample of fire department employees), our preliminary multi-trait, multi-method (MTMM) and confirmatory factor analyses suggested that the OLBI may be a viable alternative to the Maslach Burnout Inventory-General Survey (MBI-GS). It demonstrates acceptable reliability (test-retest reliability and internal consistency) as well as factorial, convergent, and discriminant validity. We discuss the implications of this study for the measurement and conceptualization of burnout and suggest a variety of research directions that stem from our findings. Our findings suggest that the OLBI offers researchers an alternative measure of burnout that offers balanced wording, that can also be used to measure the opposite phenomenon (engagement), and provides an expanded conceptualization of the exhaustion component of burnout.     

Assessments of Direct Human Exposure—The Approach of EU Risk Assessments Compared to Scenario-Based Risk Assessment

The awareness of potential risks emerging from the use of chemicals in all parts of daily life has increased the need for risk assessments that are able to cover a high number of exposure situations and thereby ensure the safety of workers and consumers. In the European Union (EU), the practice of risk assessments for chemicals is laid down in a Technical Guidance Document; it is designed to consider environmental and human occupational and residential exposure. Almost 70 EU risk assessment reports (RARs) have been finalized for high-production-volume chemicals during the last decade. In the present study, we analyze the assessment of occupational and consumer exposure to trichloroethylene and phthalates presented in six EU RARs. Exposure scenarios in these six RARs were compared to scenarios used in applications of the scenario-based risk assessment approach to the same set of chemicals. We find that scenarios used in the selected EU RARs to represent typical exposure situations in occupational or private use of chemicals and products do not necessarily represent worst-case conditions. This can be due to the use of outdated information on technical equipment and conditions in workplaces or omission of pathways that can cause consumer exposure. Considering the need for exposure and risk assessments under the new chemicals legislation of the EU, we suggest that a transparent process of collecting data on exposure situations and of generating representative exposure scenarios is implemented to improve the accuracy of risk assessments. Also, the data sets used to assess human exposure should be harmonized, summarized in a transparent fashion, and made accessible for all risk assessors and the public.     

Late Adolescents’ Coping Styles in Interpersonal and Intrapersonal Conflicts using the Narrative Disclosure Task

The present study examined differences in coping styles of female late adolescents who were writing repeated narratives about either interpersonal or intrapersonal conflicts. Following the paradigm of Pennebaker’s (Hints on writing a running experiment. Unpublished manual, 1994) narrative disclosure task, 30 female adolescents wrote about the most upsetting event in their lives for 20 min on three consecutive days. These narratives were coded for the presence of interpersonal family conflict, peer conflict, and intrapersonal conflict (e.g., academic failure, medical problem), as well as 30 specific coping processes, including processes such as resignation, blaming others, and taking active steps. These 30 processes were later grouped into five broad coping styles: approach, cognitive, avoidant, internally-focused, and externally-focused coping. The results indicated that coping styles differed significantly depending on the type of conflict. External coping strategies (e.g., blaming others, acting out) were used more often in conflicts with parents, while conciliatory coping strategies (e.g., taking active steps to solve the problem), were used more often with peer conflict. Coping strategies tended to become more adaptive by the end of the third writing session (i.e., restructuring and acceptance increased, while withdrawal, distraction, and acting out decreased). The study is aimed to enhance our understanding of adaptation to psychosocial stressors of adolescence. Clinical implications of the results are discussed and are especially relevant to practitioners working with adolescent females and their families.