Final answer:
Individuals express their biased feelings by favoring information that aligns with their existing beliefs (confirmation bias) and choosing sources that support their viewpoint (bias by a selection of sources). Other forms of bias, such as availability heuristic and representative bias, influence how people process information and events.
Step-by-step explanation:
People express their biased feelings when discussing an event or topic by favoring information that confirms their preconceptions, known as confirmation bias. This is where individuals seek out and give importance to evidence that supports their existing beliefs and dismiss anything that might contradict them. For example, during a debate, someone with a conservative viewpoint might only reference sources that have a conservative bias, ignoring any liberal perspectives, demonstrating what is known as bias by a selection of sources.
Bias can manifest in different forms, such as the availability heuristic, which is making decisions based on readily available examples, or the representative bias, which involves stereotyping. Furthermore, in historical contexts, bias can influence how individuals and historians interpret events, sometimes leading to a new understanding of past occurrences.
It's also important to recognize response biases like the "Bradley effect", where individuals might not honestly express their feelings due to social desirability, skewing the apparent support for certain outcomes or opinions.