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leoabedian leoabedian
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6 years ago
A researcher gives half of her participants a new anti-anxiety pill and the other half a placebo pill. She does not tell participants whether they have received an active treatment pill or a sugar pill. This is an example of what type of study?
 
  a. a prospective study
  b. a single-blind study
  c. a double-blind study
  d. a observational study
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mia2much39mia2much39
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6 years ago
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leoabedian Author
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6 years ago
Thanks for your help!!
jblazah
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Yesterday
Brilliant ツ
Tabitha.davis
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2 hours ago
Thanks
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