Does cognitive motivation influence how people gather and interpret information about COVID-19 and their adherence to measures? To address these questions, we conducted a longitudinal survey among European and American respondents . Wave 1 (N = 501) was conducted on March 27 , 2020 and Wave 2 (N = 326) on July 1 , 2020 . We assessed COVID-19 knowledge, endorsement of COVID-19 conspiracy theories, media use, Need for Cognition (NC), Need for Cognitive Closure (NCC), and self-reported adherence to governmental measures taken . Results showed that nearly three-quarters of our respondents actively searched for information about COVID-19 . Most at least once a day . Information seeking behaviour was not influenced by cognitive motivation (i.e., NC and NCC). However, cognitive motivation was related to (1) knowledge about COVID-19, (2) conspiracy rejection, and (3) change in knowledge over time . Respondents with more knowledge on COVID-19 also indicated to adhere more often to measures taken by their government . Self-reported adherence to measures was not influenced by cognitive motivation . Implications of these findings will be discussed.