randomization


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randomization

 [ran″dom-ĭ-za´shun]
random assignment.
The use of randomization in the design of a clinical trial. From Gordis, 1996.

ran·dom·i·za·tion

(ran'dom-ĭ-zā'shun),
Random allocation, the process of selecting entities, for example, treatment regimens, using a formal system whereby each entity has a known, generally an equal chance of being selected. This may be accomplished by means of a table of random numbers, toss of a coin, or some other system in which selection or nonselection is determined by chance alone.

randomization

Etymology: ME, randoun, run violently
the process of assigning subjects or objects to a control or experimental group on a random basis.

randomization

Random assignment, random allocation, randomized allocation Statistics The selection of subjects or samples for each 'arm' of a study or experiment based on chance alone–ie, a theoretical coin toss, which is intended to minimize the influence of irrelevant details and selection bias, and produce statistically valid data. Cf Convenience sample.

ran·dom·i·za·tion

(ran'dŏm-ī-zā'shŭn)
Assignment of the subjects of experimental research to groups by chance.
Synonym(s): randomisation.

randomization (ranˈ·d·m·zāˑ·shn),

n a method based on chance in which participants of a clinical study are assigned to comparison and/or control and treatment groups. Randomization minimizes the differences among groups by equally distributing people with particular characteristics among all the trial groups. Randomization can also be done in laboratory and observational studies.

randomization

the performance of a function, e.g. selection, in a random manner.
References in periodicals archive ?
Recently, I was wickedly surprised to note the same inappropriate randomization method in another attempt at disease classification.
5) had their BMI measured within 1 year of randomization in the usual care group compared with 9.
Marlin's randomization approach intends at breaking these assumptions by shuffling the code blocks within the text section of binary and with every execution of this binary.
In this step, we generate a number from the password (symmetric key) and use it later for the randomization method, which is used to encrypt the image file.
They underline that even given a perfect randomization, some treatment-control comparisons may not be justified, and even a proper control-treatment contrast may not be related to the investigated effect.
Overall, the study found that most participants did not understand randomization very well; however, the language used to describe randomization did influence whether participants would agree to take part in a clinical trial.
The doctor explains that randomization is like "a flip of a coin" in determining whether they would be in the treatment or standard-care group.
The term "mendelian randomization," however, was initially coined in a slightly different context, in which the random assorting of genetic variation at conception was used to generate a study design lacking confounders for the purpose of obtaining estimates of treatment influences in malignancies of childhood (18).
The Article begins by investigating the concept of randomization and the leading justifications for randomizing social decisions.
They covers basic concepts such as direct, indirect, and total effects, the advantages of cluster randomization, strategies for minimizing contamination effects, the use of stratification and restricted randomization to improve balance between treatment arms, special methods for sample size calculation, and alternatives to the simplest two-arm trial.
Drive Protector Advance encrypts the entire data on a PC's hard drive using a proprietary randomization algorithm developed by NTT Com.
In the second part of the study we centre on randomization tests and apply a new data simulation approach in order to study the statistical properties of this technique and obtain evidence on whether its application is to be advised or not.