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In a double-blind experiment, neither the researchers or the human test subjects know if they are receiving the tested medication or just a placebo (a harmless substance). This eliminates any bias by either the subject (who may psychologically influence his condition) or the experimenter (who may otherwise see effects that are not due to the treatment). While there are logistical and ethical questions that make double-blind experiments difficult, the ultimate aim is to definitively establish whether a drug or treatment actually works.
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What is the different between single blind study and double blind study?
In a single blind study, the subject being studied does not know whether he is part of the experimental group or control group, but the researcher recording the results does know. In a double blind, neither the subject nor the observer knows to which group in the experiment the subject belongs.
Was humphry davy blind?
he was blind for about 4 years because of a experiment that went wrong
What type of experiment is it when only the subject does not know it they are receiving the real treatment of the placebo?
If the experimenters know but the subject does not, it's called a "single blind" study. If the placebo is randomized and neither the subject nor the experimenters know which is the placebo, it's called a "double blind" study.
What is an experiment which uses humans to test medicines?
Double blind expiriment
What is an experiment in which neither the participant nor the individuals running the experiment know if participants are in the experiment or the control group until after the results are tallied?
A double-blind study.
Is the guitar guy in ACDC blind?
No, not a single memember of AC/DC is blind.
Participants in an experiment are said to be blind if they are uninformed about?
the experimental hypothesis being tested
What is the relationship between the experiment and the hypothesis and the experimental design?
double blind -hardvard teacher
What are the release dates for Dr- Phil - 2002 Dating Disasters Blind Date Experiment 4-55?
Dr- Phil - 2002 Dating Disasters Blind Date Experiment 4-55 was released on: USA: 11 November 2005
How is a window blind an example of a pulley?
A single fixed
Why might a double-blind study yield more reliable than a single blind study?
wqeeqweqwe
Who controls the independent variable?
It could be the experimenter, someone else (in a double blind experiment) or nobody.
