The general relevance of the impossibility teorem in smooth social choice

A complete classification theorem for voting processes on a smooth choice spaceW of dimensionw is presented. Any voting process is classified by two integersv ^* () andw(), in terms of the existence or otherwise of the optima set, IO(), and the cycle set IC().In dimension belowv ^* () the cycle set is always empty, and in dimension abovew() the optima set is nearly always empty while the cycle set is open dense and path con nected. In the latter case agenda manipulation results in any outcome.For admissible (compact, convex) choice spaces, the two sets are related by the general equilibrium result that IO() union IC() is non-empty. This in turn implies existence of optima in low dimensions. The equilibrium theorem is used to examine voting games with an infinite electorate, and the nature ofstructure induced equilibria, induced by jurisdictional restrictions.This material is based on work supported by a Nuffield Foundation grant.     

The Relationship of Adaptive and Maladaptive Behaviour to Social Outcomes for Individuals with Developmental Disabilities

The purpose of this study is to examine social outcomes including social interaction opportunities and self-expression, and how they relate to other quality of life indicators. These indicators include the overall assessment of adaptive skills, and the frequency and severity of challenging behaviour. The social interaction opportunities measured in this research include family contact, hours of habilitation, community outings, hours of employment and hours of education. Self-expression refers to the extent to which the individuals assessed indicated liking and choosing what they do in their everyday lives. The data utilised in this study were obtained from personal interviews from 3781 individuals with developmental disabilities and their caregivers. Interviewers received extensive training prior to conducting the assessments. The results indicate that people with higher adaptive ability had more contact with their families, received fewer hours of habilitation, were reported to participate in community outings more frequently, worked more hours and spent fewer hours in education. These significant correlations, however, were of marginal strength. Overall, the frequency and severity of challenging behaviour were not associated with the social interaction opportunities assessed in this study.     

Six‐Month‐Olds' Detection of Clauses Embedded in Continuous Speech: Effects of Prosodic Well‐Formedness

Three experiments investigated the role of prosodic structure for infants' recognition of embedded word sequences. Six‐month‐olds were familiarized with 2 versions of the same sequence, 1 corresponding to a well‐formed prosodic unit and the other to a prosodically ill‐formed sequence (although a successive word series). Next, infants heard 2 test passages. One included the well‐formed unit, and the other included the ill‐formed sequence. In Experiment 1, infants listened longer to the passage containing the well‐formed unit, suggesting that such units, even when they are embedded, are better recognized. Experiments 2 and 3 showed that this better recognition does not depend on an acoustic match between the familiarized sequences and their later embeddings. This suggests that the advantage of the well‐formed unit is at least partially due to infants' use of prosody to parse continuous speech.     

Being there: a family centre worker's role as a secure base for adolescent girls in crisis

Childcare social work practice with troubled adolescent girls can benefit from drawing on attachment theory, not only as a frame-work for understanding their relationship history and current behaviour but also as a framework for defining the nature and potential value of a specific kind of relationship provided by the social worker. This paper offers an analysis of the relevance of attachment theory for work with adolescent girls, particularly models of secure and insecure attachments, and examines practice experience in a family centre setting. The young women referred to the family centre had experienced a range of adversities, including sexual, physical and emotional abuse, which had seriously affected their development. They were drifting outside the systems of family, education and local authority care, because none of these could hold onto them. The paper describes how the social worker aimed to change their internal working model by offering them a different kind of relationship experience. She provided a secure base from which they could begin to develop trust, to repair their self-esteem and to build a sense of self-efficacy – the necessary ingredients for resilience and for more successful future relationships.     

Engaging the Process of Transformation

The contributions included in this issue demonstrate the variety of ways in which participatory and interpretive methods are transforming the field of psychology and clarify the integration of the personal and political commitments of the authors within their research. A number of issues remain to be negotiated, however, before these methods take their full place in the field. This conclusion considers a few of these issues, including an examination of how these approaches demand a fundamental reassessment of validity in psychological research. It also considers the critical issue of the ownership of knowledge, and proposes a reframing of the ethical guidelines for research in the field. Finally, it invites further discussion and debate around the issues raised in this issue.     

The Evolution of Organizations: Suggestions from Complexity Theory About the Interplay Between Natural Selection and Adaptation

There has been much debate in the managementliterature between neo-Darwinists (who believe in thenatural selection of populations of organizations) andadaptationists (who contend that changes in organization structure and behavior occur in response to theenvironment). The general thesis of neo-Darwinism isthat species are blindly selected for survival by theenvironment. The latest empirical support for the dominant neo-Darwinism perspective adopted bymost biologists is based primarily on the experimentsconducted by Salvador Luria who claims to haveconclusively demonstrated that genes mutate randomly.Recently, however, biologists have re-examined Luria sresearch methods and, after replications of hisexperiments, now question some aspects of the validityof his results. Moreover, there is now new researchwhich provides support for the earlier adaptationistposition, namely, the existence of evolutionary driversand directors existing within self-organizing systems.Of particular importance to the present study is the experimental indication thatself-organizing systems play a conscious role in theirown evolution. We propose that similar mechanisms orprocesses operate in organizational adaptation, thuspointing toward a theoretical modification ofneo-Darwinism that embraces both adaptation and naturalselection in a general, unified theory.     

Re-instating the vague

From medicine and military warfare to the practices of modern management, we have come to pursue the ideal of precision in order to generate the knowledge necessary to organise our social, cultural and economic lives. Underpinning this valorisation of the ideal of precision is a repulsion for its opposite –vagueness– which is habitually treated as a synonym for chaos, uncertainty and uselessness. Yet vagueness, understood here as a condition of radical uncertainty or open possibility, is inescapably imbricated in the triumphs of precision. This paper challenges this neglect by arguing that, once stripped of its pejorative connotations, vagueness can be understood as the silent but often salient partner in a marriage of opposites. Tracing the conceptual pairing of these contrasting terms, the paper goes on to suggest that instead of prising them apart we need to recognise their mutual reciprocity. By holding vagueness and precision in dynamic tension, it is suggested, we can develop a critical exploration of contemporary thinking in public policy formulation with its predilection for ‘joined‐up thinking’ and a general ‘blurring of boundaries’.