Double blind - Factbites

Double blind - Factbites
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Topic: Double blind

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	Double-blind - Wikipedia, the free encyclopedia
		The Double blind method is an important part of the scientific method, used to prevent research outcomes from being 'influenced' by the placebo effect or observer bias.
		It is also difficult to use the double blind method to compare surgical and non-surgical interventions (although sham surgery, involving a simple incision, might be ethically permitted).
		Blinded research is an important tool in many fields of research, from medicine, to psychology and the social sciences, to forensics.
	en.wikipedia.org /wiki/Double-blind (795 words)

	Double-blind - Hutchinson encyclopedia article about Double-blind
		Double blind trials eliminate bias but they must be rigorously controlled using recognized ethical standards.
		The randomization code is broken at the end of the trial and the results are analysed statistically.
	encyclopedia.farlex.com /Double-blind (129 words)

	What is a blind ABX test ? - Hydrogenaudio Forums
		Double blind means that nobody in the room or the imediate surrounding can know if X is A or B, in order to avoid any influence, even unconcious, on the listener.
		High quality electronic switches have been made for double blind listening tests (http://sound.westhost.com/abx-tester.htm) : a chip chooses X at random, and a remote control allows to compare it to A and B at will.
		The test should be performed under double blind conditions (*).
	www.hydrogenaudio.org /forums/index.php?showtopic=16295 (2362 words)

	FIELD EVAL: Double Bull Matrix Blind
		With the emergence of Double Bull blinds on the archery market, there are now two kinds of turkey bowhunters.
		To the archer, this blind allows as close to success guarantee as you can get from any product. Double Bull blinds have increased our numbers, our fun, our success and our days in the field.
		Double Bull has to be credited to bringing the ever increasing, popularization spring turkey hunts.
	www.bowhunting.net /artman/publish/Double_Bull_Matrix_Eval_.shtml (947 words)

	Ask Dr. Z - Positive double-blind Clinical Studies in Low Level Laser Therapy (LLLT)
		(Double blind randomized study on the effect of HeNe in the treatment of acute maxillary sinusitis: in patients with exacerbation of a chronic maxillary sinusitis).
		(Double blind study on the biostimulatory effects of laser irradiation on the parotid gland in patients affected by Sjoegrens syndrome).
		A double blind placebo controlled investigation of the hypoalgesic effects of low intensity laser irradiation of the cervical roots using experimental ischaemic pain.
	www.drz.org /asp/cp/studies.htm (1477 words)

	Randomized controlled trial - Wikipedia, the free encyclopedia
		These additional precautions are often in place with the more commonly accepted term "double blind trials", and thus the term "triple-blinded" is infrequently used.
		The most common meaning is that the subject, researcher and person administering the treatment (often a pharmacist) are blinded to what is being given.
		Alternately, it may mean that the patient, researcher and statistician are blinded.
	en.wikipedia.org /wiki/Randomized_controlled_trial (1455 words)

	"double blind, placebo-controlled trial"
		I am sure many of the members of the society are aware that the research team at Prince Henry/Prince of Wales Hospitals has conducted a number of "randomised, double blind, placebo-controlled trials" assessing potential treatment options for patients with CFS.
		The "double-blind" is the procedure in the study design which makes every attempt to ensure that neither the patient nor the researchers are aware which drug (active or placebo) each subject is receiving.
		The "blind" is very important in this type of research as it ensures that neither the patients nor the researcher can have any direct effect on the outcome of the treatment due to factors such as the effect of believing that one is receiving the active drug which in itself may produce some benefit.
	home.vicnet.net.au /~mecfs/general/dbpct.html (637 words)

	The Seattle Times: Food & wine: A double-blind look at Yakima Valley wines
		I elected to do this tasting double-blind, which means that all the wines were concealed in plain brown bags (single blind), and the list of participating wines and wineries was not revealed until after all my notes and scores had been finalized (that's the double-blind part).
		I am not opposed to blind tastings, but I absolutely do not believe they are any more fair (or objective) than tastings with labels revealed.
		So I had no idea of grape, vintage, price, vineyard or producer throughout the tasting, other than the fact that the wines were some combination of syrah, merlot, cabernet sauvignon, cabernet franc and perhaps some lesser-known Bordeaux grapes.
	seattletimes.nwsource.com /html/foodwine/2002805776_winecol15.html?syndication=rss (1022 words)

	AudiogoN Forums: Why is Double Blind Testing Controversial?
		While A/B testing (and particularly double blind testing, where you don't know which cable is A or B) does not show the long term listenability of a cable or other component, it does show the specific and immediate differences between the two.
		Blind and double-blind is a way, as we all know, to attempt...
		The use of blind and double-blind procedures presumes one is employing the logic of hypothesis testing.
	forum.audiogon.com /cgi-bin/fr.pl?fcabl&1039633192&read&keyw&zznull (2554 words)

	control group study, double-blind, random tests
		The evaluator is kept blind to the controls to prevent him or her from subtly tipping off the subject, either knowingly or unknowingly.
		The different performances--10 correct out of 10 tries versus 6 correct out of 25 tries--vividly illustrates the need for keeping the subject blind to the controls: it is needed to eliminate self-deception and subjective validation.
		If the evaluator knew which crates were empty and which had persons, he or she might give a visual signal to the subject by looking only at the crates with persons.
	skepdic.com /control.html (1219 words)

	Double Bull Blind
		The selling points of this blind are its fast set up time, maybe 1 minute, and its roomy interior.
		It's a 1-piece blind that pops up in seconds and has enough inside space for a chair plus two people.
		I like to use this blind for turkey hunting, but I'd use it anytime the weather turns bad.
	users.ev1.net /~chada/blind2.html (143 words)

	The effects of a double blind, placebo controlled, artificial food colourings and benzoate preservative challenge on hyperactivity in a general population sample of preschool children -- Bateman et al. 89 (6): 506 -- Archives of Disease in Childhood
		The effects of a double blind, placebo controlled, artificial food colourings and benzoate preservative challenge on hyperactivity in a general population sample of preschool children -- Bateman et al.
		The effects of a double blind, placebo controlled, artificial food colourings and benzoate preservative challenge on hyperactivity in a general population sample of preschool children
		Hyperkinesis and diet: a double blind crossover trial with tartrazine challenge.
	adc.bmjjournals.com /cgi/content/full/89/6/506 (3922 words)

	Double Blind Randomized Trial - Share The Wealth
		The true measure of efficacy is generally not randomized, double blinded, controlled clinical trials which may be useful but are extremely limited due to all manner of agendas and design complexities.
		In some cases, they are impossible to do, say for such things a DMSO, Chemo, majority of surgeries, etc. These cannot be double binded as one can smell DMSO, see the effects of Chemo and surgeries etc.
		To me most studies are frequently misleading, especially the newer ones, most are funded by vested interests and real researchers are those who have to fight the system and are usually lost in the scuffle.
	www.newmediaexplorer.org /chris/2003/09/08/double_blind_randomized_trial.htm (1315 words)

	HON Allergy Glossary Trial
		In all such studies, procedures exist to "break the blind" if circumstances require it.
		Any analysis, usually involving regression or subgroup analyses, that is aimed at identifying risk factors for a given disease or condition.
		The purpose of such a research design is to avoid any inadvertent bias of the test results.
	www.hon.ch /Library/Theme/Allergy/Glossary/trial.html (294 words)

	Double-Blind Submission and Reviewing
		Thus double-blind reviewing helps reviewers make more objective decisions, even though they may guess the author.
		The authors omit their names from the submission, replacing them with "Submitted for Blind Review." In the submission, the authors' should refer to their own prior and all prior work in the third person, and include all relevant citations.
		With blind review, I am often surprised to find I guess the authors wrong and I like work from authors that I have never heard of previously.
	www.cs.utexas.edu /users/mckinley/notes/blind.html (1052 words)

	Health Encyclopedia
		For this reason the professional opinions of practicing doctors are far less reliable than the outcomes of double-blind, placebo-controlled studies.
		Some can be prevented by using blinded evaluators; in other words, the acupuncturists know who is receiving real treatment, but a separate researcher evaluates how well participants have improved, and that researcher has no idea who received real treatment.
		The researchers behind this study added an interesting twist: while most of physicians assigned to evaluate the participants for improvement were blinded, a few were not blinded, and they knew which participants were receiving placebo.
	healthlibrary.epnet.com /GetContent.aspx?token=e0498803-7f62-4563-8d47-5fe33da65dd4&chunkiid=38405 (3921 words)

	Double Hunting Blind with 15' Tower at GREAT PRICES!
		This double deer blind is the ultimate in comfort and puts your eye level at 19 feet off the ground.
		These quality deer blinds are spacious and strong, and include a deluxe 360 degree viewing system with silent sliding plexiglas window panels.
		All deer blinds are constructed of Starboard XL Marine Grade Polymer sheets that are maintenance free and will never need painting.
	www.hrbizmall.com /catalog/product_info.php?products_id=78&osCsid=8faa4742619309a3fa86e9694bc0406d (425 words)

	THE WORLD’S FIRST DOUBLE BLIND A/B AUDIO SMELL TEST
		Newbies have heard and read about the controversy around double blind testing which is one of those great audio testing scams, so I wanted you to be aware of the only double blind test that really works.....
		To prove my point I conducted a double blind A/B (I WAS BLINDFOLDED) test to verify my claim.
		One of the reasons that directly heated triodes are virusing the world, in spite of the fact that mainstream audio pretends they don’t exist, is because of how they affect our sense of smell.
	www.meta-gizmo.com /Tri/adv/DoubleBlind.html (344 words)

	Double Bull Archery T5 Prostaff Blind
		The zippered waterfowl opening in the roof allows you to vent the heat a blind can absorb, gun for geese or doves, and it gives you the opportunity to stand up and stretch out while surveying the area you are hunting.
		Five years spent manufacturing and hunting exclusively from a ground blind, and have received many suggestions on how to improve the product.
		One major advantage of hunting from a quality ground blind is the game can’t see your movement.
	shop.3dshoots.com /product_info.php?products_id=117 (272 words)

	DOUBLE-BLIND MUSIC
		On the bare stage are chairs, occupied by Year 12 students (i.e., two horn players, two violinists, one viola player, one double bassist) dressed as blind beggars in late 18th century France; before each student is a music stand and a musical score illuminated by an electric candle.
		Haüy: Well, about a dozen blind pensioners from The Hospice for the Three Hundred - dressed in grotesque clothes and wearing opaque spectacles - were playing a discordant piece of music, with all manner of instruments, which appeared to excite the the pleasure of the spectators.
		Is it that blind tests of their comparable works in the same genre - the string quartet, the violin concerto, and the sinfonia concertante - during the same period - from 1766 to 1778 - would reveal Saint-George to be found wanting or, perhaps, in a much more disconcerting manner, quite the reverse?
	www.wissensdrang.com /wis8amex.htm (6369 words)

	double-blind placebo controlled study
		This 'blindness' ensures that the personal beliefs and expectations of either the researchers or the study subjects do not undermine the objectivity of the results.
		Until the study is complete, neither the study researchers nor the participants know who received the study test substance, and who received an identical dummy substance, called a placebo.
	www.kidsnutrition.org /consumer/nyc/volw-98e.htm (159 words)

	Double-blind - Wikipedia, the free encyclopedia
		Strictly speaking, every researcher who interacts with or treats a subject should be blinded, if an experiment is to be designated "double-blind." This situation is easily arranged when the treatment being tested is a drug, the appearance of which may be simulated with a colored pill or solution (that is, a placebo).
		The evaluation of such procedures can be approximately double-blind if the researchers responsible for recording subjects' responses and analyzing the data are blinded.
		Performing an experiment in double-blind fashion is a way to lessen the influence of prejudices and unintentional physical cues on the results.
	en.wikipedia.org /wiki/Double-blind (159 words)

	GlaxoSmithKline Clinical Trial Register - rosiglitazone studies
		A 24-week randomized, double-blind study to evaluate the efficacy, safety and tolerability of rosiglitazone (RSG) (8mg once daily) in combination with glyburide in African American and Hispanic subjects with type 2 diabetes mellitus who are inadequately controlled on glyburide monotherapy.
		Individual studies that include both approved and non-approved uses (or formulations) are listed in "Studies of Non-approved uses, formulations or treatment regimens".
		Individual studies that include both approved and non-approved treatment regimens are listed in "Studies of Approved uses, formulations and treatment regimens".
	ctr.gsk.co.uk /Summary/Rosiglitazone/StudyList.asp (159 words)

	control group study, double-blind, random tests
		The different performances--10 correct out of 10 tries versus 6 correct out of 25 tries--vividly illustrates the need for keeping the subject blind to the controls: it is needed to eliminate self-deception and subjective validation.
		Many control group studies use a placebo in control groups to keep the subjects in the dark as to whether they are being given the causal agent that is being tested.
		For example, both the control and experimental groups will be given identical looking pills in a study testing the effectiveness of a new drug.
	skepdic.com /control.html (159 words)

	Welcome to Doctor's A-Z
		Double-blind study : A method of protecting against experimental bias by ensuring that neither the test subjects nor the researchers know which subjects are receiving actual treatment and which are receiving placebo.
	www.drsa-z.com /DAZ_Encyc/Glossary_D-F.html (159 words)

	Penicillin for acute sore throat in children: randomised, double blind trial -- Zwart et al. 327 (7427): 1324 -- BMJ
		Penicillin for acute sore throat in children: randomised, double blind trial -- Zwart et al.
	bmj.bmjjournals.com /cgi/reprint/327/7427/1324 (15 words)

	Double-Blind Studies
		Primary care based randomized, double blind trial of amoxicillin versus placebo for acute otitis media in children aged under 2 years.
		In a randomized double-blind, placebo-controlled trial of a medical treatment, some of the participants are given the treatment, others are given fake treatment (placebo), and neither the researchers nor the participants know which is which until the study ends (they are thus both “blind”).
		The impact of blinding on the results of a randomized, placebo-controlled multiple sclerosis clinical trial.
	www.mendosa.com /bratman.htm (4523 words)

	PC ABX Home Page
		It is based on the ABX methodology for "Double Blind" audio tests.
		1.2.6 PCABX is based on the earlier work by various experimenters who executed Double Blind Listening Tests (DBTs) by playing computer audio files under the control of a computer software-based test coordinator.
		Often there's no problem, you can only hear the problem as long as you know what you are hearing.
	www.pcabx.com (2592 words)

	Law & Order: Double Blind - TV.com
		The title of this episode, Double Blind, references a research method where neither the subjects nor the researchers know which subjects are actually being tested, and which are the control group.
		Tell the world what you think of Double Blind, write a review for this episode.
		Martha Stewart is the internationally known host of numerous homemaking television shows.
	www.tv.com /law-&-order/double-blind/episode/9600/summary.html (370 words)

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In the News (Sat 26 Dec 09)