After a person has been diagnosed with schizophrenia in a family, the chance for a sibling to also be diagnosed with schizophrenia is 7 to 9 percent. If a parent has schizophrenia, the chance for a child to have the disorder is 10 to 15 percent. Over 250,000 diagnosed cases in Britain. 2  Rates of schizophrenia are generally similar from country to countryabout .5% to 1 percent of the population (there are variations-but the variance is difficult to track due to differing measuring standards in many countries, etc.).
View Full Document. Test Bias â A test bias is a systematic difference in the meaning of test scores amongst different groups. There are internal and external ways to identify test score bias. Test Fairness â This refers to how a test is used.
Here are a few more forms of bias to consider. Subjective interpretations may be biased by prior knowledge. Diagnostic review bias occurs when interpretation of the gold standard test is made with knowledge of the test under investigation or other clinical data. Incorporation bias occurs when results of the test under study are actually used to make the final diagnosis.