Evidence-Based Practice / Unit 6 EBP 0773 short lesson, about 20 seconds
Selection Bias
Captions available
The idea
Selection bias arises when those who take part in a study differ from those who do not, in ways that influence the outcome.
In practice
Volunteers for an exercise study who began with a more positive attitude to exercise.
Where people slip
Everyone in a study consented to be in it. That fact makes selection bias a feature of every study, not an occasional defect.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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