The Impact of Intra-group Interaction on Identity and Action

The unifying theme of the chapters presented in this thesis is that intra-group interaction impacts on in-group identity content, and this content provides a foundation for social action and social behaviour. The primary goals of this thesis are first, to demonstrate that social realities can be established and transformed through interaction; and second, to investigate why the process of intra-group interaction can spark and exacerbate social conflict. In Chapter 1, I review and attempt to theoretically integrate the disparate literatures on group discussion, identity and action. In Chapter 2, I investigate the effect of interaction on the positive-negative asymmetry effect (PNAE). In Study 2.1, participants were more likely to discriminate on rewards than fines, and find allocating rewards to be a more legitimate and pleasant act than allocating fines. Conversely, participants thought allocating fines would have a more negative effect on recipients and felt more negative about allocating fines than rewards. In Study 2.2, when in-group advancement was obstructed, no PNAE was found: obstruction was sufficient justification for out-group punishment in its own right. When in-group advancement was not obstructed, the PNAE reversed after group discussion, such that more hostility occurred when participants administered fines than when they awarded rewards. This reversal was mediated by processes of norm formation. In Chapter 3, I describe three studies which show that consensual intra-group discussions about a negatively regarded out-group increased inter-group hostility. Study 3.1 compared group discussion about immigrants with individual reflection. Results showed that group discussion informed the content of stereotypes, which led to support for anti-immigrant policies. In Study 3.2, participants discussed either an irrelevant topic, the out-group stereotype, or the out-group stereotype plus what concrete actions should be taken towards that group. Only discussion of the stereotype significantly increased hostility, suggesting that the psychological products of discussion per se (cohesion, identification, etc.) are not solely responsible for hostility. Rather, social validation of the stereotype explained why its discussion increased hostility. Study 3.3 replicated these results with a behavioural measure. In Chapter 4, I present two studies which controlled for the content of interaction by showing participants short films of similar others having a group discussion. Study 4.1 investigated the paradoxical finding that when groups discuss potential courses of action against an out-group, they are less likely to act than when they discuss simply the out-group stereotype (Chapter 3). Results suggested that when group discussions imply that there is social consensus about a course of action, even the advocacy of extreme actions can increase support for (more moderate) social action. Study 4.2 manipulated whether or not the discussants consensualised on the out-group stereotype, whilst controlling for discussion content. Only when the discussion ended in consensus did participants identify with the discussants and perceive norms for social action. In Chapter 5, I address how social identities and their associated (self-) stereotypes can disadvantage members of low status groups, but how they can also promote social change. The data demonstrates that consensualisation in small groups can transform (or reconfirm) such stereotypes, thereby eliminating (or bolstering) stereotype threat effects. In Study 5.1, female participants were asked why men are (or are not) better at maths. They generated their answers individually or through group discussion. Stereotype threat was undermined only when they collectively challenged the stereotype. Content analyses suggest that discussions redefined in-group and out-group stereotypes, providing the basis for stigma reversal or confirmation. In Study 5.2, male and female participants confirmed or challenged the stereotype in same-gender discussion groups or no discussion, baseline conditions. After a discussion that confirmed the stereotype, women displayed signs of stereotype threat and men’s performance was “lifted”. When they challenged the stereotype, the difference between men and women on the maths test was eliminated. Overall, the results reported in this thesis suggest that intra-group interaction enables group members to develop an understanding of their common ideology, which may establish the consensual basis of their identity content. If such consensualisation occurs, this provides them with a sense that their perceptions of reality are socially valid, and gives rise to (implicit or explicit) in-group norms. This provides individuals with a solid foundation upon which they may act. The implications of these conclusions are discussed in Chapter 6.Economic and Social Research Counci

The Unusual Spectrum of Comet 96P/Machholz

We report spectra from 3000-5900 A for comet 96P/Machholz, obtained on 2007 Apr 27 UT with the 3-m Shane telescope at Lick Observatory. The spectra are extremely carbon poor, and show a prominent NH_2 series, but no CN emission. NH, NH_2, and C_2 gas production rates are (8.36 +/- 2.18)x10^25, (29.88 +/- 3.66)x10^25, and (4.52 +/- 0.61)x10^23 molecules sec^-1, respectively, as determined from Haser model fits to the data. Upper limits to the gas production rates for CN and C_3 are 7.5x10^22 and 2.0x10^23, respectively. Though 96P is depleted in C_2 and C_3 relative to NH, it is even more depleted in CN than other so-called "carbon-chain depleted" comets.Comment: 14 pages, 4 tables, 2 figures, accepted for publication in ApJ

Resolved Imaging of the HD191089 Debris Disc

Two thirds of the F star members of the 12 Myr old Beta Pictoris Moving Group (BPMG) show significant excess emission in the mid-infrared, several million years after the expected dispersal of the protoplanetary disc. Theoretical models of planet formation suggest that this peak in the mid-infrared emission could be due to the formation of Pluto-sized bodies in the disc, which ignite the collisional cascade and enhance the production of small dust. Here we present resolved mid-infrared imaging of the disc of HD191089 (F5V in the BPMG) and consider its implications for the state of planet formation in this system. HD191089 was observed at 18.3 microns using T-ReCS on Gemini South and the images were compared to models of the disc to constrain the radial distribution of the dust. The emission observed at 18.3 microns is shown to be significantly extended beyond the PSF at a position angle of 80 degrees. This is the first time dust emission has been resolved around HD191089. Modelling indicates that the emission arises from a dust belt from 28-90 AU, inclined at 35 degrees from edge on with very little emission from the inner 28AU of the disc, indicating the presence of an inner cavity. The steep slope of the inner edge is more consistent with truncation by a planet than with ongoing stirring. A tentative brightness asymmetry F(W)/F(E)=0.80+/-0.12 (1.8 sigma) between the two sides of the disc could be evidence for perturbations from a massive body on an eccentric orbit in the system.Comment: 11 Pages Accepted to MNRA

Financing regional government in the UK: some issues.

Over the last decade there has been a resurgence of interest in the possibility of some measure of devolution to regional governments for at least parts of the United Kingdom. In Scotland, the debate has been particularly advanced, and three of the four main political parties in Scotland are committed to substantial devolution. As in the unsuccessful devolution proposals of 1979, the proposals for Scotland are echoed by similar, though less unequivocal, devolution proposals for Wales. Devolution in England has attracted less enthusiasm, and much less vigorous debate, except in a few regions, notably the North East. Regional government raises a number of finance questions, which are the subject of this paper. The issue of finance has been most prominent in the debate over devolution in Scotland, with intense interest focusing on, at one extreme, the fiscal position of Scotland if it were wholly dependent on Scottish tax revenues to finance Scottish expenditures, and, at the other extreme, on the adequacy and/or effects of giving a Scottish Parliament power to vary income tax rates within a three percentage point band. There has been much less discussion of other finance issues.

Data DNA: The Next Generation of Statistical Metadata

Describes the components of a complete statistical metadata system and suggests ways to create and structure metadata for better access and understanding of data sets by diverse users

Optimizing the integration of advanced practitioners in a department of surgery: An operational improvement model

Physician assistants (PAs) and nurse practitioners (NPs) have established themselves as key members of the healthcare team to supplement practicing physicians in patient care. PAs and NPs are collectively referred to as “advanced providers” (APs) and work not only in primary care but in general surgery and surgical subspecialties. Studies have addressed AP integration into the profession of medicine and have examined cost and efficacy of APs, attitudes about APs among residents, and educational impact of APs, but very little literature exists that describes a formalized approach to AP integration into a department of surgery, specifically with AP/resident integration. The purpose of this paper is to describe an initiative for developing an operational improvement model for APs working with residents on surgical inpatient services in a large academic health center. The model consists of four components and each component is described in detail from discovery state towards continuous improvement. Formal professional development opportunities for APs as well as appointing a Clinical Director for Surgical APs have positively impacted AP integration into the department of surgery

Servitization and operations management : a service-dominant logic approach

Managing organisational performance in sectors such as equipment provision has become increasingly complex as competition has heightened and firms have felt pressure to add value through the provision of services (Baines et al, 2007; Howard and Caldwell, 2011; Neely et al., 2011). This provision is commonly referred to as the servitization of manufacturing (Vandermerwe & Rada, 1988). By extending the traditional offering of equipment to include service activities however, underlying operational delivery systems and processes have become more complex to manage and co-ordinate. No longer are firms simply making and shipping products; they are now engaged in a more complex world of design and delivery (Neely et al., 2011). This study aims to explore servitization from a value perspective through the lens of Service-Dominant (S-D) logic, and to propose its implications for operations management

Targeting foreclosure interventions: an analysis of neighborhood characteristics associated with high foreclosure rates in two Minnesota counties

This study examines the statistical association of foreclosure sales with social, economic and housing variables measured at the Census tract level for two purposes of interest to foreclosure mitigation practitioners —- to assess whether it is feasible to identify in advance neighborhoods likely to have high rates of foreclosure, and to explore the socioeconomic traits of high-foreclosure neighborhoods so as to design appropriate mitigation programs. We collected data on foreclosure sales in 2002 from the sheriff’s departments of Hennepin and Ramsey counties, the two core counties that comprise the Minneapolis-St. Paul MSA. We find that several factors commonly associated with high foreclosure sale rates could have correctly identified, in advance, most neighborhoods with high rates of mortgage foreclosure. To guide the design of foreclosure mitigation programs, we also present evidence that foreclosure risks in our two counties were highest in neighborhoods with elevated credit risk indicators and a high proportion of homeowners who are recent minority buyers or young. We show that an accurate credit risk variable is among the best predictors of foreclosure and also critically affects our multivariate analysis of factors associated with foreclosure. To limit social losses associated with foreclosures, we conclude that consideration should be given to enhancing public access to data on mortgages, foreclosures, and foreclosure risk factors, especially the neighborhood distribution of credit scores.