Mental fatigue at work and pain perception

Abstract

The object of this study was to determine whether mental fatigue connected with high and low stimulation at work can affect the subjects' perception of pain. Two groups of female visual display unit operators were studied: the first group performed tasks involving high levels of stimulation, while the second group performed tasks involving low levels of stimulation. The results show that mental fatigue due to a high level of stimulation causes an increase in pain ratings, while the mental fatigue due to low stimulation level causes a decrease in pain ratings.     

Considerations on the ‘Replication Problem’ in Sociology

We re-examine the so-called “replication problem” in sociology—a scarcity of published studies dedicated to reproducing findings from prior research. We do this in part by considering the larger epistemological traditions of the natural sciences and humanities. We make three primary arguments: that (1) replication studies are more prevalent than is commonly perceived, (2) calls for and discussions of replication do not attend enough to issues of theory, and (3) we should reconsider as a discipline how we evaluate replications. In developing this third argument, we draw on the concept of episteme, discussing two epistemes that concurrently exist in sociology: the scientific project and the aesthetic object. The former overlaps with approaches to knowledge growth in the natural sciences, the latter with the humanities. We propose that sociology is situated between these extremes, presenting unique challenges for replication research. In particular, nuanced considerations of replications in sociology foreclose any simplistic accounts of a replication problem in the discipline.     

On Movement Frames and Negotiated Identities: The Case of Poland's First Solidarity Congress

How do participants in a social movement come to agree on goals and strategies? Recent scholarship has moved in two theoretical directions. Some writers focus on movement leaders and their efforts to excite and attract potential supporters by formulating a vision that conveys optimism and moral outrage, yet is congruent with long-standing popular beliefs. Other writers focus far less on leaders and their frames and insist, instead, that movements are organizationally decentralized and typically lack consensus on goals and strategies. From this second perspective, programs are best seen as the byproducts of ongoing clashes and messy negotiations between a myriad of local activists with different beliefs, diverse values, and frequently divergent interests. Using the First Solidarity Congress as a historical case study, this article argues for the utility of combining both approaches – one that focuses on leaders’ ongoing efforts to build consensus around a seemingly effective frame, and the other that stresses the extent of intra-movement discord and the decentralized nature of movement organizations.     

Zur Nachhaltigkeit von Bildungsaufstiegen

The educational expansion has led as a whole to an upgrade of the educational level of the population and, for the individuals, to educational improvement. This paper examines how sustainable these educational improvements are, in other words weather the children of the educationally improved have the same educational opportunities as the children of those whose level of education is traditionally high. The results show that the social heredity transmission of educational success is based on a mechanism that covers several generations, with the result that the educational level of the grandparents still has a considerable effect on the educational opportunities of the grandchildren, a low educational level of grandparents has a negative effect on that of their grandchildren. This phenomenon is demonstrated using the Socio-Economic Panel. An empirically-based outline explanation that takes the theoretical perspectives of Bourdieu as its starting point is then developed. The results show that the upward mobility due to educational expansion is to some degree only transient, which challenges the notion of the sustainability of educational improvement.     

The role of multi-objective optimization in negotiation and mediation support

The paper reviews the methodology of multi-objective modeling and optimization used in decision support based on computerized analytical models (as opposed to logical models used in expert systems) that represent expert knowledge in a given field. The essential aspects of this methodology relate to its flexibility: modeling and optimization methods are treated not as goals in themselves but as tools that help a sovereign user (an analyst or a decision maker) to interact with the model, to generate and analyze various decision options, to learn about possible outcomes of these decisions. Although the applications of such methods in negotiation and mediation support is scarce yet, their flexibility increases essentially the chances of such applications. Various aspects of negotiation and mediation methods related to multi-objective optimization and game theory are also reviewed. A possible application of the MCBARG system for supporting negotiation related to the acid rain problem is briefly summarized.     

Nonexponential Applications of a Global Cramèr-Rao Inequality

The paper is concerned with an application of the information inequality for the Bayes risk (global Cramèr-Rao inequality) to nonexponential estimation problems. A new methodology of proving minimaxity is presented by considering the example of estimating the scale or location parameter under one-sided truncation of the parameter space.     

Price Inference in Small Markets

This paper investigates the effects of market size on the ability of price to aggregate traders' private information. To account for heterogeneity in correlation of trader values, a Gaussian model of double auction is introduced that departs from the standard information structure based on a common (fundamental) shock. The paper shows that markets are informationally efficient only if correlations of values coincide across all bidder pairs. As a result, with heterogeneously interdependent values, price informativeness may not increase monotonically with market size. As a necessary and sufficient condition for the monotonicity, price informativeness increases with the number of traders if the implied reduction in (the absolute value of) an average correlation statistic of an information structure is sufficiently small.     

Catching up,forging ahead or falling behind? Central and Eastern European development in 1990–2005

This paper aims to assess the economic development and development policies in the Central and Eastern European (CEE) countries in 1990–2005, from the collapse of the USSR to the enlargement of the European Union. A great number of authors have generally seen the transition as a very positive process. They have concluded that the reform policies focusing on macroeconomic and price stability have been the key to success for CEE economies. A reliable economic environment is, of course, instrumental for longer-term economic success, as exemplified by the prolonged crisis in most of the former Soviet Union. Our analysis of the economic development and competitive advantages in the region, however, leads to the conclusion that the specific approach to transition that the Central and Eastern European countries followed came at a rather high cost. Comparative neglect and weakness of a set of policies crucial for longer-term development, such as science, technology and innovation policies, has led to deterioration in the last decade rather than the strengthening of the competitive advantages of Central and Eastern European economies. Furthermore, we argue that, in most cases, CEE countries have unfortunately overlooked or misjudged a number of development challenges, and have thus implemented policies that have generated growth at the cost of rapidly increasing risks. This is how the financial fragility of several Central and Eastern European countries has recently increased drastically, and the region seems to have virtually arrived at the brink of economic collapse. Since the CEE countries joined the European Union, the CEE governments have gradually moved towards acquiring a more active role in economic development. These policies need, however, to be strengthened considerably and reinforced by macroeconomic policies that curb current excessive dependence on foreign-financed growth.