Question Detail

BIO 201 Objective Question

Question

Which study step is crucial for preventing allocation bias in parallel group diagnostic trials?
Options
A Concealed random sequence allocation
Correct Answer
B Post-hoc subgroup exclusion
C Unblinded data entry by principal investigators
D Replacement of dropouts with non-randomized subjects
Correct Answer

Option A is the correct answer.

Detailed Explanation

Allocation concealment ensures researchers cannot foresee assignment order, preventing selective enrollment into specific study arms.

Hint

No hint available

Question Info