A fictional reading-app study shows why a randomized design alone does not settle the risk of bias.
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Assigned 120 university adults to a reading app or usual study practice for four weeks.
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The excerpt reports 24 missing outcomes and does not provide an effect estimate.
Missing outcomes and unblinded self-report can complicate interpretation, even with random allocation.
Bottom line
Inspect the bias domains, compare their passages, and notice the unsupported reporting claim being marked unclear.
For: Anyone practicing critical appraisal. This example does not support a real health or learning decision.
Flesch Reading Ease: 42.5/100 (moderate difficulty)