Partisanship, attribution and approval in a public health shock

Political scientists have long agreed that partisanship can bias how voters evaluate government performance and attribute responsibility. However, less is known about how – and to what extent – these biases work across different types of voters, or how they respond to positive or non-partisan policy outcomes. In this research note we address these questions, focusing on how voters respond to a positive, non-partisan public health shock: the successful early rollout of Covid-19 vaccinations in England. Through a pre-registered information experiment embedded in the British Election Study (N > 6000), we test how voters respond to claims that the quasi-independent National Health Service, rather than the government, deserved credit for the success of the programme. On average, subjects do attribute less responsibility to government, but this has no downstream effect on general approval. Exploratory heterogeneity analyses suggest that government and opposition supporters, as well as historic swing voters, respond homogeneously to our intervention. Our findings are not fully explained by rational or selective frameworks of responsibility attribution, and add nuance to existing experimental work on the political effects of the pandemic.