Despite its intuitive appeal and the empirical evidence for it, the hypothesis of cognitive polyphasia (Moscovici, 1961/1976/2008) remains largely unexplored. This article attempts to clarify some of the ideas behind this concept by examining its operations at the level of individuals and by proposing a conceptual model that includes some elements of social cognition. Indeed, calls for a rapprochement between the theory of social representations and cognitive psychology have been made by Moscovici, in particular, in his 1984 paper on The myth of the lonely paradigm and in his paper on La nouvelle pensée magique (1992) in which he argues that the theory of social representations provides an explanatory framework for the descriptions offered by cognitive psychology and that their combining could translate into a finer understanding of contemporary social phenomena. Building on the results of an empirical examination of the controversy that surrounded the MMR vaccination programme in the UK between 1998 and 2005, different ways of engaging into cognitive polyphasia are proposed, including what can be described as cognitive “monophasia”, that is, the exclusive use of one type of knowledge, at least at the level of the individual. A brief discussion about the implications of the proposed conceptual model for our understanding of cognitive polyphasia and of the different ways of making sense of the world around us concludes this article.

Population ageing is one of the major contemporary issues facing societies across the world. Originally framed as a major social and economic challenge, demographic ageing is now beginning to be seen as offering huge potential to individuals as well as to their communities. It is this positive potential that we explore in this issue by utilising two key disciplinary approaches-social gerontology and social/community psychology. In this introduction, we argue that focus on only one or the other of these perspectives is limiting. Instead, a more critical approach is needed that incorporates the strengths of both disciplines in order to build a more complete and stronger understanding of ageing and community. Thus, a focus on social gerontology highlights ageing issues and explores the diversity of older people and their interactions with community. By incorporating a social/ community psychology approach, there is potential to complement this body of work through a deeper level of analysis around community, as well as individual and relational dimensions. The result is a special issue that brings together these two perspectives to address some of the shortcomings of approaching ageing through solely one disciplinary lens.

With the number of Covid cases and Covid-related deaths continuing unabated, achieving a high vaccination coverage is essential to ensure the safety of staff and patients and resume normal hospital care admissions and operations. This article questions current strategies around vaccination in healthcare settings and proposes ways to understand and address vaccination hesitancy among staff. It offers insights on how to develop a multifaceted vaccination strategy, which takes into consideration vaccination hesitancy among healthcare professionals and community-specific factors. Drawing from social psychological theories, we suggest that the root of vaccination hesitancy lies in conflicting representations or cognitive polyphasia. In addition, we argue that current communication strategies mostly rely on rational arguments and ignores the importance of a more emotion-based approach.

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