Single blind is when they are testing a new medicine to see if they work they have people they give the real medicine to, and a control group they give a placebo, or sugar pill to, who think they got it, so they can see how much difference there really is. Double blind is when the doctor evaluating them does not know which group they belong to while evaluating their improvement. Another doctor assigned them to groups and keeps track of that.
single blind study to test effectivness of aspirin as pain relief
get 10 patients with pain... give half aspirin and half a placebo
doctor knows which is which, but patient does not.... in effect the patient is 'blind' as to which is the real medicine
if the patient cannot know which is which, it removes the possibility of the patients own expectations affecting the outcome
double blind study
same as above, but patients are assigned a numbered drug
doctor does not know which is placebo and which is aspirin, neither does patient, until tests are complete
in this way, the expectations of the doctor cannot confuse/ affect the patient
in effect the doctor is 'blind' and the patient is 'blind' = double blind
The Prophets tell us that the single blind study is that He Has Blinded their right eye so that they cannot see The Truth and turn and be healed in producing fruits in keeping with Repentance to be fruitful and multiply and increase on the earth and subdue it in overcoming the kingdom of the lesser light of darkness.
The double blind is that ones eyes are closed and these are less guilty many times, except when one enters the Kingdom and does not repent as in the three cities who have woes coming. WWI WWII WWIII.
Bethsaida, Korazin, and Capernaum goes down to the depths in the appearance of the false prophet who implements the mark of the number of his name as restricted commerce worship to himself as Mammon without the 'M' Ammon who are ten worldwide leaders who confirm a covenant with him to rule for a short tribulation time period.
thanx