Can a team have too much cohesion? The dark side to network density

The goal of most work teams is high performance. Prior studies suggest that performance within work groups is influenced by that group’s social network topology. Research has generally revealed to date that group cohesion (i.e., network density) is positively related to team performance under certain conditions. However, more recent research has indicated that this is not the full story. Recent research suggests that an inverse curvilinear relationship exists between social network measures (of which group cohesion is one) and team performance. In response to the need for understanding this relationship more fully, and leveraging the promising new insights that can be garnered with the use of social network analysis (SNA), this study employs SNA as a tool to explore the structural cohesiveness of teams of travel agents. This research extends our understanding of the relationship between intragroup social network relations and team performance by confirming an inverse curvilinear relationship exists between group cohesion and team performance. This paper leverages email communication to determine the social networks of each team, and then examines such in light of team performance. In total, an analysis of more than 7 million emails was undertaken. This study was conducted with work teams within a service organization. Each team in the study carries out the same tasks, i.e., identical task contingency, yet represents a distinct unit of analysis. The study confirms that social network topology is a valuable predictor of team performance and confirms that, like so many other social network measures, group cohesion and team performance share an inverse ‘U’ shaped relationship, not strictly a positive one as previously posited.     

UPPER BOUNDS FOR LATINIZED DESIGNS

Upper bounds axe derived for the efficiency factor of a class of resolvable incomplete block designs known as latinized designs. These designs are particularly useful in glasshouse and field trials, and can be readily extended to two-dimensional blocking structures. Existing bounds for resolvable designs axe also reviewed and a comparison is made between the third moment bounds discussed by Jarrett (1989) and the second moment bounds of Tjur (1990).     

Constructing family relationships: Intimacy, harmony and social value in accounts of sheltered retirement community residents

This research was undertaken at a West Coast USA sheltered retirement community where fifteen able elder residents were interviewed about their personal relationships and communication with peers, family and younger people. This paper focuses on respondent's discursive constructions of their relationships with family—particularly adult grandchildren. The analysis shows how respondents' talk about family relationships is largely positive and discusses how respondents build an image of intergenerational solidarity through their accounts of frequency and quality of contact with grandchildren. Some of the ways that intergenerational solidarity is communicated in the context of the interview are: discounting of family problems; cataloguing achievements and talking about grandchildren with pride; demonstrating that they–the elder–are valued; and accounts of how problematic aspects of their relationships are avoided in intergenerational talk.     

The truth and lie story: developing a tool for assessing child witnesses' ability to differentiate between truth and lies

Within the court arena, the credibility and competency of child witnesses often comes under scrutiny and the decision whether a child is considered to be credible or not strongly in?uences whether their evidence will be heard by the court. A child's ability to demonstrate that they understand the difference between truth and lies and the importance of telling the truth is synonymous with competency. Research suggests that many professionals undertaking the task of establishing competency ?nd it very dif?cult, especially with younger children (Aldridge and Wood, 1997, cited in Aldridge and Wood, 1998). This paper describes the process involved in developing an innovative tool for helping professionals assess whether a child understands the difference between truth and lies. The development of the tool arose from the concerns of of?cers from Northumbria Police Force (in the UK) relating to interviews following the protocol of the government's Memorandum of Good Practice (Home Of?ce and Department of Health, 1992) on interviewing child witnesses, and the need to establish whether child witnesses can differentiate between truth and lies. As an example of good practice, The Truth and Lie Story described here has now been included in the Home Of?ce (2002) guidance Achieving Best Evidence in Criminal Proceedings, which is a revision of the 1992 Memorandum of Good Practice. Copyright © 2004 John Wiley & Sons, Ltd.     

As Good as it Gets? A Life Course Perspective on Marital Quality

Marital relationships, like individuals, follow a developmental trajectory over time with ups and downs and gains and losses. We work from a life course perspective and use growth curve analysis to look at trajectories of change in marital quality over time. Although the tendency is for marital quality to decline over time, some groups begin with much higher levels of marital quality than others. Moreover, a number of life course and contextual factors can accelerate or slow this path of change. Our findings point to the importance of considering the multi-dimensionality of time (e.g., age, marital duration, the passage of years) as well as family transitions (e.g., having children, emptying or refilling the nest) in creating the meanings and experiences of marriage over time.     

Mental health support needs of people with a learning difficulty: a medical or a social model?

People with learning difficulties, like all disabled people, face social oppression. Much recent policy and practice are underpinned by at least some understanding of this oppression, and the social model of disability has been influential in discussions of services and supports for people with learning difficulties. However, in the area of mental health, the picture is somewhat different. This paper argues that the medical model has predominated in discussions of mental health support for people with learning difficulties, and that a social model approach could have much to offer. The paper draws on an ongoing action research study in which service providers, families and young people with learning difficulties are working together to articulate what is needed, in order to find routes to improve the support offered to young people with learning difficulties and mental health support needs.