Conservatism bias is a cognitive bias that refers to the tendency to prefer the status quo and to be overly cautious when making decisions. This bias can lead to a reluctance to accept new ideas, an unwillingness to take risks, and an overall preference for the familiar. Conservatism
From Wikipedia
In cognitive psychology and decision science, conservatism or conservatism bias is a bias which refers to the tendency to revise one's belief insufficiently when presented with new evidence. This bias describes human belief revision in which people over-weigh the prior distribution and under-weigh new sample evidence when compared to Bayesian belief-revision.