Do Groups Exclude Others More Readily Than Individuals in Coalition Formation?

The present research compared interindividual and intergroup coalition processes. We examined whether groups are more likely to form small coalitions than individuals, and whether this tendency would depend on the social value orientation of the coalition party. Consistent with our hypothesis, results revealed that proselfs formed more small coalitions in intergroup settings than in interindividual settings whereas prosocials formed a similar number of small coalitions in both intergroup and interindividual settings. These and complementary findings add credence to the claim that people who are self-oriented are more likely to exclude others to maximize their own payoff and that such processes are especially pronounced in intergroup settings

HP1α recruitment to DNA damage by p150CAF-1 promotes homologous recombination repair

p150CAF-1-mediated recruitment of HP1α to DNA is essential for efficient assembly of DNA damage response complexes and subsequent homologous recombination repair

AGC kinases and MAB4/MEL proteins maintain PIN polarity by limiting lateral diffusion in plant cells

Polar subcellular localization of the PIN exporters of the phytohormone auxin is a key determinant of directional, intercellular auxin transport and thus a central topic of both plant cell and developmental biology. Arabidopsis mutants lacking PID, a kinase that phosphorylates PINs, or the MAB4/MEL proteins of unknown molecular function display PIN polarity defects and phenocopy pin mutants, but mechanistic insights into howthese factors convey PIN polarity are missing. Here, by combining protein biochemistry with quantitative live-cell imaging, we demonstrate that PINs, MAB4/MELs, and AGC kinases interact in the same complex at the plasma membrane. MAB4/MELs are recruited to the plasma membrane by the PINs and in concert with the AGC kinases maintain PIN polarity through limiting lateral diffusion-based escape of PINs from the polar domain. The PIN-MAB4/MEL-PID protein complex has self-reinforcing properties thanks to positive feedback between AGC kinase-mediated PIN phosphorylation and MAB4/MEL recruitment. Wethus uncover the molecular mechanism by which AGC kinases and MAB4/MEL proteins regulate PIN localization and plant development.Plant science

The good, the bad and the ugly thing to do when sharing information: Revealing, concealing and lying depend on social motivation, distribution and importance of information

Research on information sharing in group decision-making has widely assumed a cooperative context and focused on the exchange of shared or unshared information in the hidden profile paradigm ([Stasser and Titus, 1985] and [Stasser and Titus, 1987]), neglecting the role of information importance. We argue that information sharing is a mixed-motive conflict setting that gives rise to motivated strategic behavior. We introduce a research paradigm that combines aspects of the traditional information sampling paradigm with aspects of a public good dilemma: the information pooling game. In three experiments, we show that information sharing is strategic behavior that depends on people's pro-social or pro-self motivation, and that people consider information sharedness and information importance when deciding whether to reveal, withhold, or falsify their private or public information. Pro-social individuals were consistently found to honestly reveal their private and important information, while selfish individuals strategically concealed or even lied about their private and important information.Information sharing Social motives Deception Group decision-making

Believing shapes seeing: the impact of diversity beliefs on the construal of group composition

Previous research has suggested that diversity effects depend on how group members perceive their group’s composition. However, what determines how diversity is perceived is unclear. We argue that the way in which group members construe their group’s diversity is shaped by group members’ beliefs about the value in diversity. Focusing on groups with objective subgroups, we show in two studies that the more group members value diversity, the more likely they are to construe their diversity in terms of individual differences and the less likely they are to construe their diversity in terms of subgroups. We also show that diversity construal is only affected by diversity beliefs during intellectual tasks (where diversity matters), but not during physical tasks

Power and deception in ultimatum bargaining

In two experiments we investigated the relation between power and deception in ultimatum bargaining. Results showed that recipients of an ultimatum used deception to obtain better offers and that more recipients did so in a low power position. Further analyses showed that the recipient's use of deception was mediated by concerns about receiving a low offer. For allocators, being in a low power position did not increase the use of deception. Instead, allocators increased their offer when they were in a low power position. The results are discussed in terms of an instrumental approach to deception. This approach incorporates the notion that bargainers (a) will use deception as a means to reach their goals in bargaining but (b) may refrain from using deception when they have alternative means to reach their goals.Bargaining Deception Power Ethics Ultimatums Negotiations Lying Information Dependency

Effectiveness and toxicity of single-fraction radiotherapy with 1 X 8 Gy for metastatic spinal cord compression

Toxicity and functional. outcome were evaluated in 199 MSCC-patients irradiated with 1 X 8 Gy. Motor function improved in 54/199 patients (27%). Patients who regained walking ability were 20/78 (26%). Long-term-survivors (>= 12 months) who needed re-irradiation for in-field-recurrence were 19/65 (29%). Acute toxicity was mild, late toxicity not observed. A randomised trial comparing single-fraction RT to multi-fraction RT is mandatory. (c) 2005 Elsevier Ireland Ltd. All rights reserve