A good test is fundamentally designed to provide fair, accurate, and consistent measurement of what it intends to assess. Key characteristics include Objectivity, meaning the scoring is free from personal bias; Reliability, indicating that the test yields consistent results over time or across different forms; and Validity, which ensures the test truly measures what it claims to measure. These three pillars are crucial for any credible assessment.
The correct answer, Bias, is precisely what a good test strives to avoid. Bias refers to systematic errors in a test that unfairly favor or disadvantage certain groups or individuals, compromising the test's fairness and accuracy. Therefore, bias is a flaw, not a characteristic, of a well-constructed and ethical assessment instrument.