A type of study in which neither the subject taking the drug nor the investigator giving them the drug know whether it is the active, real drug or a placebo.
An experimental design, often used in drug research, in which neither the investigator nor the patients know which subjects are in the treatment and which in the nontreatment condition until the experiment has been completed.
an experimental method by which both the subject and the experimenter are unaware of the nature of a given treatment; this design helps to avoid bias in experimental studies.
a design characteristic of clinical study by which neither the participants nor the person administering treatment know which treatment any particular subject is receiving. Usually the comparison is between and experimental drug and a placebo. This study method is accepted as the best way to eliminate data bias because neither the doctor nor the patient can knowingly affect the observed results in a consistent way .
refers to a clinical trial in which neither the patient nor their doctor knows which treatment the patient is receiving
A single blind study means that someone (patient or physician) does not know what is going on. Double blind means that at least two people (patient and physician) don't know what's going on. Triple blind might mean that the paper is written before the results are tabulated. The whole point is to prevent bias.
a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results
a method of treatment assignment in certain clinical trials in which the patient, the research staff and the physician are all unaware of the treatment assigned
A method of minimizing bias in a clinical trial, where neither the patient nor those collecting and evaluating the data know what treatment the patient is receiving (e.g., whether the patient is a member of the study group or control group).
A randomized trial where the participant and doctor are unaware of which group they belong to, whether it be the control or experimental
An experimental procedure in which neither the subject nor experimenter is aware of key features of the experiment.
a type of scientific experiment in which neither the subjects nor the researchers know who is receiving an active substance and who is receiving a placebo. Researchers who do not know which subjects received the active substance then usually evaluate the data generated from the experiment. This type of experiment helps to eliminate personal bias from research.
The design of a study in which neither the investigator or the subject knows which medication (or placebo) the subject is receiving.
Aspect of a randomized trial in which neither the participant nor the investigator knows the arm of the trial to which the patient is assigned. Purpose is to eliminate any bias in reporting of results.
scientific technique used to eliminate bias in a study, where neither the study participant nor the experimenter (doctor) knows which of two treatments the participant is receiving
a technique used in modern scientific research to separate facts from the hopes and wishes of both scientists and experimental subjects. A treatment which is to be tested is administered by scientists who do not know whether they are using the active treatment or the inactive placebo. The experimental subjects don't know which is which, wither. The test results are evaluated by scientists who also do not know which group received the active treatment and which the placebo. At the end of the experiment, the secret code is broken, and the responses of the subjects to the real experimental treatment are compared with their responses to the placebo.
A feature of a randomised study (see randomisation) in which neither the subject nor the investigator knows the treatment group to which an individual subject has been assigned (see clinical study). This enables a more accurate analysis of the results and any side effects at the end of the study.
1. A procedure in a clinical trial for issuing and administering treatment assignments by code number in order to keep study patients and all members of the clinic staff, especially those responsible for patient treatment and data collection, from knowing the assigned treatments. 2. Any condition in which two different groups of people are purposely denied access to a piece of information in order to keep that information from influencing some measurement, observation, or process.
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. Blinded research is an important tool in many fields of research, from medicine, to psychology and the social sciences, to forensics.