Fill in the missing words using the options given.
Methodological problems exist within many RCTs that compare NRT to (2) ______. This is because smokers in the (3) ______ condition can detect that they are not receiving any (4) ______ (Mooney, White, & Hatsukami, 2004; Polito, 2008). Dar, Stronguin and Etter (2005) found that (5) ______ group members were 3.3 times more likely to correctly guess that they had received placebo than to incorrectly guess that they had received nicotine (54.5% v. 16.4%). If the trials in a RCT are not (6) ______, the findings give a misleading picture of treatment effectiveness.
Which word is a best fit?
A. control
B. double blind
C. placebos
D. placebo
Answer: A
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