The use of
credible placebo control groups for CBGT and phenelzine (educational supportive therapy and pill placebo, respectively) enhances the validity of the conclusion that the 2 primary therapies being tested were genuinely effective in alleviating social phobia.
Researchers leading a large, ongoing study in women called VOICE that compares PrEP with pills to a vaginal microbicide plan to revaluate the ethics of continuing to use
a placebo control group given the new evidence of oral Truvada's powerful impact.
Despite the lack of
a placebo control group in this study, this finding suggests that ApoC - III impairs TG clearance predominantly in an LPL - independent fashion.
Participants who passed the screening were randomly assigned to either a Montmorency tart cherry juice group or
a placebo control group.
The study involved 16 semi-professional male soccer players aged 21 to 29 who were randomly assigned to either a Montmorency tart cherry concentrate group or
a placebo control group.
In an RCT participants in the study (sometimes also called subjects) are randomly assigned to the treatment (getting the drug) or
the placebo control group (get a sugar pill which isn't the drug).
Limitations include possible contamination of
the placebo control group with exposure treatment through the weekly assessment process.