Final answer:
It is true that once a schema is established, people often have difficulty accepting contradictory information due to confirmation bias and the emotional investment in existing beliefs.
Step-by-step explanation:
The statement is true: Once a schema has been established, it is often difficult for individuals to accept new information that contradicts it. This difficulty is largely due to the well-documented psychological phenomenon known as confirmation bias. Confirmation bias refers to the tendency to search for, interpret, favor, and recall information in a way that confirms one's preexisting beliefs or hypotheses. Peter Wason's experiments on falsification reveal how individuals frequently select information that confirms their established beliefs, rather than information that challenges them. Schema and beliefs act as cognitive frameworks that help interpret and make sense of the world, and altering them can require significant cognitive effort, thus people may resist. This resistance is often reinforced by emotional attachments to the beliefs and the desire for consistency within one's social group, which can lead to tribal thinking.