Which type of error can arise from human actions during testing, such as specimen handling and data entry?

• A. Latent Error
• B. Random Error
• C. Variation
• D. Active Error

Answer: (D)

Active errors are mistakes made by people at the moment of performing a task. When someone directly handles a specimen or enters data incorrectly, the error stems from the operator’s action and can immediately affect the test result. This contrasts with latent errors, which are hidden weaknesses in systems or procedures that may contribute to mistakes later, not from the action itself. Random errors are unpredictable fluctuations that occur despite care, and a general term like variation doesn’t specify the human-action origin. So, actions taken during testing—such as specimen handling and data entry—are best described as active errors because they arise from the operator’s direct action and have an immediate impact.