The Psychology of Polarization and Misinformation: A Comprehensive Literature Review

In an increasingly interconnected digital era, two interwoven phenomena have come to dominate public discourse: societal polarization and the rampant dissemination of misinformation. These forces threaten the integrity of democratic institutions, public health, and collective decision-making. This literature review synthesizes contemporary psychological research to unravel the intricate cognitive, emotional, and social mechanisms driving these phenomena. Drawing upon high-impact journals such as Nature, Science, PNAS, Psychological Science, and Nature Human Behaviour, it examines how cognitive biases—including confirmation bias, motivated reasoning, and the illusory truth effect—distort individual engagement with information and reinforce entrenched beliefs. Emotional triggers such as anger and fear accelerate the spread of misinformation and deepen societal divides. Group identities and social dynamics further entrench ideological segregation, exacerbated by the design of digital platforms. Interventions like prebunking, media literacy, and behavioural nudges offer promise, yet significant gaps remain, especially in addressing AI-generated content and enhancing cultural inclusivity. The review concludes with a call for interdisciplinary collaboration to develop informed, resilient responses to these pressing issues.