allocation of individuals to groups, eg. for experimental and control regimens, by chance, in order to make groups similar at the start of an investigation. The randomisation process may or may not consider particular characteristics of the subject being entered
Process of putting into groups by chance, to make sure there is no bias.
a deliberately haphazard arrangement of observations so as to simulate chance
Introduced by R. A. Fisher in 1926 so that inferential statistics could be carried out to analyse differences between groups of subjects.
The allocation to a treatment group that is performed at random.
The process by which patients in a clinical trial are randomly assigned to experimental intervention or control treatment. Randomisation minimises the differences among groups by equally distributing participants with particular characteristics (known or unknown) among all the trial arms.
The process by which subjects are allocated to one of two or more therapy groups by chance and thus minimise selection bias. Other than chance variation, the resulting groups are also likely to be similar to one another at the start of the trial. Randomisation involves application of a predetermined plan to ensure that chance alone determines allocation to therapy groups.
In a clinical study, a procedure through which a treatment is assigned to each subject. This assignation is made randomly. The procedure enables the realisation of groups of subjects with very similar characteristics, so that their results are comparable.
The process of ensuring that a sample is truly random. There are many ways of doing this, and to different levels. The entire sample should be chosen according to some strategy that does not unduly favour any particular group of individuals. A further level ensures that the subjects already chosen for the study are randomly allocated to the treatments of the study. This removes any suspicion that unscrupulous experimenters ensure that their particular hobby horse is tried out on the most susceptible subjects.
The process of assigning trial subjects to treatment or control groups using an element of chance to determine the assignments in order to reduce bias.
