More recently, Herman founded a company called SpinSpotter, whose browser plug-in purports to detect bias and spin in news articles and other web pages.

It is used primarily as a visual aid to detecting bias or systematic heterogeneity.

Some ways of detecting and preventing bias, such as the audit trail, have been well developed.

DIF is used to detect bias in test items by using student data to measure how different groups perform on test items.

In one report she found that opinion researchers must sometimes resort to biased questions to detect bias on the respondent's part.

"If we detected bias, we had to make sure that the review panel was put together so that that bias would be neutralized," he said.

Wisconsin's literacy standard, for example, expects high school students to prepare a research paper that detects bias in sources.

In each comparison, Kuypers "detected massive bias on the part of the press."

Just as you might be detecting bias in one form or another on the part of the film maker, the content makes it abundantly clear that there are no easy answers.

Journalist Michael Massing writes that "Jewish organizations are quick to detect bias in the coverage of the Middle East, and quick to complain about it.