Psychology / Unit 1 Psych 0099 short lesson, about 20 seconds
Single-Blind and Double-Blind Designs
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The idea
In a single-blind design the participant does not know their condition; in a double-blind design neither participant nor experimenter knows.
In practice
In a drug trial, the nurse handing out pills and the patient swallowing them are both working from coded bottles.
Where people slip
Blinding the participant alone leaves the experimenter's expectations in the data.
Your place on the trail
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