Theories about group decision-making and problem-solving suggest that aggregating knowledge, insights, or expertise from a diverse group of people is an effective strategy to solve complex problems, a notion called collective intelligence . Further, they may introduce new biases in the way people consume information and form beliefs, which are not well understood yet.
However, just by fostering such a proliferation of information to which people are exposed, social media may interfere with cognitive selection biases, amplifying undesirable phenomena such as extremism and the spread of misinformation . Social media feeds are key tools for accessing high volumes of news, opinions, and public information. The rise of social media has led to unprecedented changes in the scale and speed at which people share information.
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