Final answer:
Confirmation bias is the principle that describes the tendency of individuals to make decisions that are in line with their past choices, as it aligns with their preexisting beliefs.
Step-by-step explanation:
The idea that people tend to make decisions similar to ones they had made in the past supports the principle of confirmation bias. This cognitive bias involves the tendency to search for, interpret, favor, and recall information in a way that confirms one's preexisting beliefs and hypotheses. It shows a preference for consistency in one's thought processes and past decisions. When individuals engage in confirmation bias, they might dismiss or undervalue evidence that contradicts their existing beliefs, focusing instead on information that supports the decisions they have made before.