Motor-vehicle safety in Europe and the USA: A public-health perspective

This article provides a public-health perspective on the motor-vehicle safety situation in Europe and in the United States. It will be argued that a prerequisite for such a perspective is the use of fatality rate per capita, instead of the usually employed rate per distance traveled. To illustrate the public-health perspective, two sets of analyses were performed. The first set of analyses compared motor-vehicle fatality rates to fatality rates from other causes of death. The second set contrasted the motor-vehicle fatality rates per population in different countries, providing information about traffic safety relative to other countries.     

Supervisor behaviors,role stressors and uncertainty as predictors of personal outcomes for subordinates

Among employees of comparable organizations in the United States and New Zealand, role stressors (ambiguity and conflict), along with effort-to-performance uncertainty, performance-to-outcome uncertainty and doubt about acceptance by one's supervisor, generally predicted job satisfaction, psychological strain and turnover intentions. Path analyses of three alternative theoretical models highlighted the importance of job satisfaction as a mediator of the effects of role stressors and uncertainty on strain and turnover intentions. Role stressors contributed separately and via uncertainty to all three outcome measures, but subordinate perceptions of supervisor behaviors added little independent predictive power, once the role stressors and uncertainty were accounted for. These findings support the hypothesis that supervisors can influence the degree of role stress and uncertainty which their subordinates experience, which in turn may affect levels of satisfaction, strain and turnover intentions.     

VALIDATION OF A BRIEF SCREENING MEASURE OF ENVIRONMENTAL CHEMICAL SENSITIVITY: THE CHEMICAL ODOR INTOLERANCE INDEX

The development and validation of a brief self-report screening measure of environmental chemical sensitivity, the Chemical Odor Intolerance Index (CII), is described. Subjects included 1734 college students, 192 older adults, and 38 chemically intolerant and multiple chemical sensitivity (MCS) patients. The results of the studies demonstrate that the CII has strong internal stability (Cronbach's alpha ranging from 0.80 to 0.92 across samples), and evidence of factorial, group, convergent, and discriminant validity is reported across diverse samples. In future research, the CII will permit the quantification of self-reported illness from low levels of environmental chemicals as a continuous rather than dichotomous variable. Consequently, the CII will facilitate the ability to compare and standardize subject selection criteria in both preclinical and clinical (i.e. MCS) populations.     

Distribution of some trace metals and their fluxes in the Genesee River,NY

Total and particulate metal concentrations, measured during intensive synoptic studies of the Genesee River, NY, correlated with suspended-sediment concentration and river discharge. Dissolved metal concentrations, on the other hand, showed little systematic variation over the length of the river. Metal and sediment fluxes for two elevated-discharged periods peaked at a midbasin sampling site. For most metals at most sampling sties particulate materials comprised over one-half of the total material. Comparison of particulate material metal concentrations, normalized to the measured suspended-sediment concentrations had with basinwide average values shows that sites having low suspended-sediment concentrations had high particulate material metal contents relative to the basin averages, while sites with high suspended-sediment concentration had low metal contents. These results are consistent with a metal transport mechanism in the Genesee River involving (1) a nearly constant dissolved component, (2) a fine acid-soluble component, and (3) a coarse component that is effectively a neutral diluent in the sediment. Chemical factors, such as sediment organic content, also appear to affect metal transport in the Genesee River.