The Effort-Reward Imbalance model of psychosocial stress at the workplace—a comparison of ERI exposure assessment using two estimation methods

It is not unusual for old data to be used in epidemiological studies. Recently developed instruments for measuring work-related stress did not exist when the data collection was carried out. Therefore, approximate questions are sometimes used. An apparent problem is the lack of validation of proxy questions. The aim of this study was to compare the original questions for measuring Effort-Reward Imbalance (ERI) with approximate questions. The study population corresponded with a subgroup in the WOLF-n (WOrk, Lipids, Fibrinogen-north) cohort study of cardiovascular risk in a working population in the north of Sweden: 655 men and 178 women. The agreement in exposure between the original and the approximate ERI single questions was relatively low throughout, whereas the correlation between the ERI subscales and the ERI ratios was reasonable. The latter agreement between the original and the approximate ERI ratio indicates that the approximate measures might have been useful in the past. Yet, whenever possible the implementation of the original questionnaire in study protocols is recommended since a complete measurement of ERI might help to further improve the internal consistency and the predictive validity of this exposure to effort-reward imbalance.     

Job characteristics as predictors of ill-health and sickness absenteeism in different occupational types--a multigroup structural equation modelling approach

The objective of the present study was to test for multigroup invariance in measurement models and structural models between job characteristics, psychosocial intervening variables, health outcomes and sickness absenteeism. Four types of occupation were represented in the study: blue-collar workers ( n = 241), white-collar workers ( n = 209), elderly-care workers ( n = 338) and child-care workers ( n = 336). A first-order, six-factor multigroup confirmatory factor analysis model (i.e. measurement model) composed of two perceived job characteristics ( job autonomy and skill discretion), appraised workload, job satisfaction, stress-related ill-health and sickness absenteeism provided a good model fit. Invariance tests showed that the six-factor model fits well for all occupations. A partially recursive mediated multigroup structural model showed both similarities and differences across occupations as regards the relationships between independent latent variables ( job autonomy, skill discretion), intervening latent variables (appraised workload, job satisfaction) and dependent latent variables (stressrelated ill-health, sickness absenteeism). By comparing a generic model with occupation-specific models across occupations, this study showed that occupation-specific models were more plausible. The results indicate that it is important to examine different occupational contexts in detail to better understand how certain psychosocial factors at work influence strain in different occupations. Since job characteristics can potentially be amended, the findings have important implications for the differentiation of prevention and intervention in different occupations.     

Fatigue effects of noise on aeroplane mechanics

Abstract

Subjective fatigue and reaction time performance were measured in a group of 24 aeroplane mechanics, during 1 week of high noise exposure and 1 week of low noise exposure. Subjective ratings were collected before and after each work day. On the last day of each week subjects also completed a reaction time task before and after work. The mechanics felt more sleepy and less energetic during the high noise week. This effect was most evident towards the end of the day and there was a build-up of the effect during the week. Reaction times were prolonged during the high noise week. Possible confounding factors are discussed and found to be less likely explanations of the effects.     

Prisoner’s Dilemma payoffs and the evolution of co-operative preferences

We analyse the evolutionary stability of a preference for reciprocity in the Prisoner’s Dilemma. A distingushing and, as we argue, plausible, feature of the analysis is that reciprocal players are not assumed to be able to coordinate on mutual cooperation with probability one. We show how two payoff conditions, one well-known and another new, then become crucial for the evolutionary stability of co-operation. Somewhat paradoxically perhaps, an altruistic preference poses a greater threat to stable cooperation than a self-interested preference.     

Anthropic Shadow: Observation Selection Effects and Human Extinction Risks

We describe a significant practical consequence of taking anthropic biases into account in deriving predictions for rare stochastic catastrophic events. The risks associated with catastrophes such as asteroidal/cometary impacts, supervolcanic episodes, and explosions of supernovae/gamma‐ray bursts are based on their observed frequencies. As a result, the frequencies of catastrophes that destroy or are otherwise incompatible with the existence of observers are systematically underestimated. We describe the consequences of this anthropic bias for estimation of catastrophic risks, and suggest some directions for future work.     

Robustness of partial least-squares method for estimating latent variable quality structures

Latent variable structural models and the partial least-squares (PLS) estimation procedure have found increased interest since being used in the context of customer satisfaction measurement. The well-known property that the estimates of the inner structure model are inconsistent implies biased estimates for finite sample sizes. A simplified version of the structural model that is used for the Swedish Customer Satisfaction Index (SCSI) system has been used to generate simulated data and to study the PLS algorithm in the presence of three inadequacies: (i) skew instead of symmetric distributions for manifest variables; (ii) multi-collinearity within blocks of manifest and between latent variables; and (iii) misspecification of the structural model (omission of regressors). The simulation results show that the PLS method is quite robust against these inadequacies. The bias that is caused by the inconsistency of PLS estimates is substantially increased only for extremely skewed distributions and for the erroneous omission of a highly relevant latent regressor variable. The estimated scores of the latent variables are always in very good agreement with the true values and seem to be unaffected by the inadequacies under investigation.     

Organized Anti-Semitism in Contemporary Ukraine: Structure,Influence and Ideology

In the wake of the Orange Revolution, Ukraine has witnessed a substantial growth in organized anti-Semitism. Central to this development is an organization, known as the Interregional Academy of Human Resources, better known by its Ukrainian acronym MAUP. It operates a well-connected political network that reaches the very top of the Ukrainian society. MAUP is the largest private university in Ukraine, with 57,000 students at 24 regional campuses. MAUP is connected to the KKK; David Duke is teaching courses in history and international relations at the university. Funded by Saudi Arabia, Libya and Iran, MAUP’s printing house publishes about 85% of the anti-Semitic literature in Ukraine. Until very recently, Ukrainian President Yushchenko and Foreign Minister Tarasiuk served on its board; former President Kravchuk still does. This paper is a study of anti-Semitism in Ukraine, of its intellectual roots, influence and strength. It traces the Soviet, Christian, German and racist political traditions and outlines the political ambitions of organized anti-Semitism in post-Orange Revolution Ukraine.     

Evaluation of an STD-Prevention Program for Swedish University Students

Abstract

The authors evaluated a sexually transmitted disease (STD)-prevention program that combined a mass media campaign with peer education. The program was designed to increase Swedish university students' knowledge about STDs. improve attitudes toward condom use, and tell students where to get an STD checkup. Preintervention and postintervention postal questionnaires were used with an intervention group and two types of control groups. Responses ranged from 32% to 67% for the randomly selected students and from 93% to 99% for classroom and clinic participants. The intervention was noticed by a majority of the students (85–98%) and discussed by 43% to 57%; more women than men observed and discussed the campaign. Knowledge about STDs. where to turn for STD checkups, and the intention of having an STD checkup increased. Attitudes toward condom use were equally positive before and after the intervention. Although it was successful in attracting attention and leading to discussions of STD prevention, the campaign did not encourage students to have an STD checkup.     

Becoming a Narrator: A Case Study in the Dynamics of Learning Based on the Theories/Methods of Vygotsky

This article focuses on the learning that is enabled while a primary school child makes a story using multimodal software. This child is diagnosed with autism. The aim is to use a cultural-historical framework to carry out an in-depth analysis of a process of learning with action as a unit of analysis. The article is based on a collaborative research project in which assignments on narration concurrently served as experiments with cultural tools. The child's learning process in one assignment is analyzed sequentially, highlighting changes in the action, based on data from videotape. The child's decision to record audio was a turning point that expanded the formal learning and animated the idea of making the story in a desired multimodal format. The multifaceted quality and the dialectics revealed in the process are vital to achieve expansive action and learning. The combination of a generative narrative model and the multimodal affordances is crucial for actualizing the potential in the research approach to accomplish an analysis of the learner's changes in action. Thus, the study indicates the relevance of using a cultural-historical framework in research and practice that focuses on processes of learning and processes of becoming among diverse learners.