Single-blinding is done to avoid an effect of:

Question

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The question asks about the purpose of single-blind design in research and what it is intended to prevent.
Option 1: 'Expectations of the participants in a study' — This is the core idea of single-blind procedures. When participants do not know which treatment they are receiving, their expectations cannot influence their reporting of symptoms, perceived improvements, or placebo effects, thereby reducing response bias and demand characteristics.
Option 2: 'Pregnancy effects on a treatment' — This is a specific biological or physiological outcome, not a bias motivation for blinding. Blinding does not address whether a treatment has pregnancy-related effects; it aims to reduce bias in assessment and reporting.
Option 3: 'Triassic deduction' — This term is unrelated to research methodology. It does not pertain to how blinding is used or why it is employed in trials.
Option 4: 'Research funders contaminating a result' — While sponsor or investigator biases can influence research, single-blinding primarily targets participant awareness rather than funder influence. Contamination by funders is more about conflicts of interest and broader governance than the specific mechanism of single-blind design.
Option 5: 'Contamination by poor randomization' — This concerns allocation concealment and randomization procedures. While important for trial validity, poor randomization is a separate issue from blinding. Blinding does not directly fix randomization quality, and single-blind does not inherently prevent allocation bias.

ATHK1X01 Mastery Quiz 13

Single-blinding is done to avoid an effect of:

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