Bias is when the creator’s perspective is so strongly for or against something that the information in the source is clearly unbalanced or prejudiced. All sources contain some degree of bias, but it is not always possible to detect it.
Bias can either be extremely positive or extremely negative.
If extremely positive, it is described as “pro-”, or “in favour of”, etc.
If extremely negative, it is described as “anti-”, or “strongly against”, etc.
If you cannot detect a bias, it is described as a “balanced” source.
You need to be able to identify particular words or information in the source that clearly show the bias of the creator.
Demonstrating the identification of bias in your writing:
The Gallic Wars has an overt pro-Caesar bias since it portrays him in an obviously positive way, with very little mention of any of his failures.
The Refugee Council of Australia is very biased in favour of refugees since they believe that the Pacific Solution is “illegal” (2007, n.p.).
According to the refugee advocacy group, Refugee Council of Australia, the Pacific Solution resulted in Australia failing in its legal obligations to genuine refugees (2007, n.p.).