Condom use negotiation in heterosexual African American adults: responses to types of social power-based strategies

This study examined gender differences and preferences in the use of and response to six different styles of condom use negotiation with a hypothetical sexual partner of the opposite gender. Participants were 51 heterosexually active African American adults attending an inner-city community center. Participants completed a semistructured qualitative interview in which they were presented with six negotiation strategies based on Raven's 1992 Power/Interaction Model of Interpersonal Influence. Results showed that female participants responded best to referent, reward, and legitimate strategies, and worst to informational tactics. Male participants responded best to reward strategies, and worst to coercion to use condoms. Further, responses given by a subset of participants indicated that use of negotiation tactics involving coercion to use condoms may result in negative or angry reactions. Response to strategies may vary with the value of the relationship as viewed by the target of negotiation. Implications for HIV prevention efforts are discussed.     

超高效液相色谱的七年之痒:未来在何方

这篇文章对超高效液相色谱(UHPLC)技术进行了调查。文章中讨论的主题包括了使用者的受益,如何将传统方法过渡到UHPLC以及是否所有常规高效液相色谱(HPLC)模式都能应用到相应的UHPLC上。在接下来的10年中,我们可以期望这项技术得到不断改进,并且由于色谱仪器的使用寿命一般为10年,下一代的UHPLC色谱仪应该就会在1到2年之内开始出现。     

Discriminating between the Poisson and negative binomial distributions:an application to goal scoring in association football

Negative binomial and Poisson distributions are fitted to data on scores in Association Football for the seasons 1946–47 to 1983–84. There are strong grounds for preferring the negative binomial up to 1970; thereafter the Poisson seems adequate. Simplification is achieved by fitting the negative binomial with a common parameter. The analyses are set in the context of previous applications and interpretations in the area. Different models giving rise to the negative binomial or Poisson are investigated and some support found for models not previously advanced in this context. Notwith-standing the success of such exercises some scepticism is expressed about the interpretations placed on previous analyses.     

The primary-goods indexation problem in Rawls's theory of justice

Rawls's Difference Principle holds that basic social institutions are just if they maximize the worst-off individual's potential welfare, which depends on the vector of amounts of primary goods. As Rawls recognized, the multiplicity of primary goods poses an index number problem. This paper uses the machinery of social choice to characterize the class of procedures for aggregating quantities of several primary goods into a composite ordinal index that are consistent with Rawls's analysis. Only very simple and unattractive aggregation methods in which the various primary goods play roles of radically different magnitudes are compatible with Rawls's argument.     

Middle East and North African Information Resources: Western Libraries Navigating the Montage

The spotlight for this edition of “The Balance Point” is on publishing and collection development issues in the Middle East and North African (MENA) region of the world. While reflecting upon recent events in the Middle East and Europe, the column editor began to wonder what impact current issues have on publishing, collection development, scholarly communication, and discoverability of resources from the MENA region, as well as the impact these issues have on the collection development activities of Western academic research libraries. Blair Kuntz, the Near and Middle Eastern studies librarian at the University of Toronto Library, was asked to coauthor the column and to share his insights regarding the region with readers. The authors discuss the myriad issues and the mosaic of collection development issues for the MENA region.     

Automatically Detected Nonverbal Behavior Predicts Creativity in Collaborating Dyads

In the current study we administered a creative task in which two people collaboratively generated novel strategies to conserve resources. During this task, the nonverbal behavior of 104 participants in 52 pairs was tracked and recorded using the Kinect computer vision algorithm. We created a measure of synchrony by correlating movements between the two dyad members, and showed that synchrony occurred—that is, correlations decreased when we increased delay between the recorded movements of pair members. We also demonstrated a link between nonverbal synchrony and creativity, as operationalized by the number of new, valid ideas produced. Linear correlations demonstrated a significant relationship between synchrony and creativity. Finally, models using synchrony scores as input predicted whether dyads were high or low in creativity with a success rate as high as 86.7 % in the more exclusive subsets. We discuss implications for methodological approaches to measuring nonverbal behavior and synchrony, and suggest practical applications which can leverage the current findings.     

Parental sensitivity and friendship development: The mediating role of cooperation

Interactions with mothers and fathers form a critical foundation for youths’ later peer relationships. This study focused on the associations of maternal and paternal sensitivity in third grade with friendship outcomes in sixth grade. Because interactions with parents provide the earliest opportunities for children to learn prosocial behaviors such as cooperation, and cooperation is theoretically conceptualized as a foundation of friendship, cooperation may play a role in the link between parenting and children’s later social relationships. Using the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development sample (N = 955; 51% female; 83% White), and a multimethod, multireporter longitudinal design, children’s cooperation was tested as a mediating mechanism that linked parental sensitivity to early adolescent friendship. Results indicated that most indirect paths from both mothers and fathers’ sensitivity to observed friendship interactions and perceived friendship quality, via cooperation, were significant. Findings provide a more concrete understanding of how parental sensitivity translates to better friendships.