1.Bias, prejudice mean a strong inclination of the mind or a preconceived opinion about something or someone. A bias may be favorable or unfavorable: bias in favor of or against an idea.
2.If you notice the following, the source may be biased:
*Heavily opinionated or one-sided.
Relies on unsupported or unsubstantiated claims.
*Presents highly selected facts that lean to a certain outcome.
*Pretends to present facts, but offers only opinion.
*Uses extreme or inappropriate language.
3.It's important to understand bias when you are researching because it helps you see the purpose of a text, whether it's a piece of writing, a painting, a photograph - anything. You need to be able to identify bias in every source you use.
