The study is one of the first statistical analyses to document possible bias in the state's criminal justice system, experts said.

Now it wants better information on the scientists' possible biases.

This raises issues of possible racial bias in substance tests with hair samples.

Beyond the questions about possible racial bias, the federal system has not been under the criticism that many states have.

One would have to check for possible subjective bias on the part of the machine, of course.

In the new study the Government made a creative and elaborate effort to overcome some of these possible biases.

Another type of subjective test is done under more controlled conditions and attempts to remove possible bias from listening tests.

Get more than one person to compile the shortlist to avoid possible bias.

She decided to leave the interpretation of her results to other people, to avoid any possible bias.

Because of these possible biases, further studies were conducted using daily diaries.