In a blinded trial, participants and clinicians are unaware of treatment allocation, but raters are not. Which bias is MOST likely introduced?
Explanation:
Detection bias, also known as ascertainment bias or observer bias, occurs when the assessment of the outcome is systematically different between the groups being compared, often due to the assessor's knowledge of the intervention. If the raters who assess the outcome are not blinded to the treatment allocation, their knowledge could influence how they look for, interpret, or record the outcomes, leading to biased results.
Explanation:
Detection bias, also known as ascertainment bias or observer bias, occurs when the assessment of the outcome is systematically different between the groups being compared, often due to the assessor's knowledge of the intervention. If the raters who assess the outcome are not blinded to the treatment allocation, their knowledge could influence how they look for, interpret, or record the outcomes, leading to biased results.