Zur Epidemiologie des Drogenkonsumes in Deutschland

This review is about the epidemiology of drug-consumption in the Federal Republic of Germany including its associated medical and criminological problems referring to the latest official statistics of 2007 and 2008.     

How decisions evolve: The temporal dynamics of action selection

To study the process of decision-making under conflict, researchers typically analyze response latency and accuracy. However, these tools provide little evidence regarding how the resolution of conflict unfolds over time. Here, we analyzed the trajectories of mouse movements while participants performed a continuous version of a spatial conflict task (the Simon task). We applied a novel combination of multiple regression analysis and distribution analysis to determine how conflict on the present trial and carry-over from the previous trial affect responding. Response on the previous trial and the degree of conflict on the previous and the current trial all influenced performance, but they did so differently: The previous response influenced the early part of the mouse trajectory, but the degree of previous and current conflict influenced later parts. This suggests that in this task experiencing conflict may not proactively ready the system to handle conflict on the next trial; rather, when conflict is experienced on the subsequent trial the previous compensatory processing may be re-activated more efficiently.     

Dressing for success: Effects of color and layering on perceptions of women in business

This study examines the effect on perceived competence of colors and layers in traditional business attire. Forty-five St. Ambrose College Master's in Business Administration program students (11 female, 34 male) judged eight artist's sketches of prospective job applicants varying in sex, color of suit worn (red or blue) and presence or absence of a jacket (layering). Analysis of variance results confirmed hypotheses that a person wearing blue or a jacket was perceived as more competent and properly dressed than a person wearing red or no jacket. Furthermore, these variables had more impact on the perception of male targets than of female targets. Finally, although males with blue jackets were rated most highly, female targets were rated more favorably than males overall. Apparently, while only a particular style of dress is considered suitable for men, a specific business uniform does not yet seem to have fully emerged for women. What has emerged as suitable dress for women seems to be to merely adopt, to some extent, traditional male attire.We gratefully acknowledge the assistance of Carolyn Pillers and Michael Jerin for their help in data analysis and Rachel Chouteau for the preparation of artistic materials.     

A Longitudinal Examination of the Effects of LMX,Ability, and Differentiation on Team Performance

Purpose  

Leader–Member Exchange (LMX) theory posits that effective leaders form dyadic relationships with followers that differ in quality, and that differentiation positively affects team performance. The purpose of this study was to test the notion that leader differentiation positively impacts team performance, and to investigate whether such effects differ at different points in the team’s lifecycle.