Professor Emeritus of Psychology and Marketing Robert Cialdini says the 'I got my COVID-19 vaccine!' stickers can create a sense of belonging.

In this story published Dec. 21, 2020, on Scripps National News:

That sense of belonging does cause us to feel, again, more motivated to belong to that group, to do what those other people around us are doing. But also, to stay true to the norms of that group by trying to convince others that those are the correct actions to take and norms to adopt.

– Robert Cialdini, professor emeritus of psychology and marketing