The COVID-19 pandemic represents a massive global health crisis. Because the crisis requires large-scale behaviour change and places significant psychological burdens on individuals, insights from the social and behavioural sciences can be used to help align human behaviour with the recommendations of epidemiologists and public health experts. Here we discuss evidence from a selection of research topics relevant to pandemics, including work on navigating threats, social and cultural influences on behaviour, science communication, moral decision-making, leadership, and stress and coping. In each section, we note the nature and quality of prior research, including uncertainty and unsettled issues. We identify several insights for effective response to the COVID-19 pandemic and highlight important gaps researchers should move quickly to fill in the coming weeks and months.

An ethnographic study of two crowd events was carried out in order to develop a hypothesis about the experience of empowerment in collective action. Qualitative comparison of an anti-roads occupation and a mass eviction suggests that empowerment as an outcome of collective action is a function of the extent to which one's own action is understood as expressing social identity, a process we term collective self-objectification. The comparison indicates that empowerment is not reducible to the experience of success. While both events came to be construed by participants as ‘victories’, their associated emotions (joy versus despair and anger) and rationales for future participation (confidence versus enhanced self-legitimacy) were different. The relation between collective self-objectification and self-efficacy is discussed. Copyright © 2005 John Wiley & Sons, Ltd.

This review provides a new integration of recent research that has formed the basis of a social identity explanation of supportive collective behaviour among survivors in emergencies and disasters. I describe a model in which a sense of common fate is the source of an emergent shared social identity among survivors, which in turn provides the motivation to give social support to others affected. In addition, by drawing on the concept of relational transformation in psychological crowds, I show how an emergent shared social identity can engender a range of further behavioural and cognitive consequences that contribute to collective self-organisation in emergencies, including expected support, coordination of behaviour, and collective efficacy. It will be argued that the model can been applied to explaining how potentially dangerous crowd events avoid disaster: shared social identity operates as the basis of spontaneous self-organisation in these cases, as in many emergencies and disasters.