Cluster-level Assignment Controlled Experiment
(Redirected from Group-level Assignment Controlled Experiment)
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A Group-level Assignment Controlled Experiment is a controlled experiment where treatment assignment involves predefined groups.
- Context:
- It can range from a Cluster Randomized Assignment Experiment (CRT) to being a Non-Randomized Group-level Assignment Experiment.
- It can range from a Categorical Outcome Group-level Controlled Experiment to being an Ordinal Outcome Group-level Controlled Experiment to being a Continuous Outcome Group-level Controlled Experiment.
- It can be analyzed by a Group-level Assignment Controlled Experiment Analysis Task.
- …
- Example(s):
- give a different treatment to different villages.
- …
- Counter-Example(s):
- See: Stratified Treatment Assignment.
References
2004
- (Murray et al., 2004) ⇒ David M Murray, Sherri P Varnell, and Jonathan L Blitstein. (2004). “Design and Analysis of Group-randomized Trials: A Review of Recent Methodological Developments."
- QUOTE: Group-randomized trials (GRTs) are comparative studies designed to evaluate interventions that operate at a group level, manipulate the physical or social environment, or cannot be delivered to individuals.1 Examples include school-, worksite-, and community-based studies designed to improve the health of students, employees, and residents, respectively. Just as the [[randomized clinical trial (RCT)]] is the gold standard in public health and medicine when allocation of individual participants is possible, the GRT is the gold standard when allocation of identifiable groups is necessary.
There are 4 characteristics that distinguish the GRT from the more familiar RCT. First, the unit of assignment is an identifiable group; such groups are formed not at random but rather through some physical, social, geographic, or other connection among their members. Second, different groups are assigned to each condition, creating a nested or hierarchical structure for the design and the data. Third, the units of observation are members of those groups nested within both their condition and their group. Fourth, usually only a limited number of groups are assigned to each condition.
- QUOTE: Group-randomized trials (GRTs) are comparative studies designed to evaluate interventions that operate at a group level, manipulate the physical or social environment, or cannot be delivered to individuals.1 Examples include school-, worksite-, and community-based studies designed to improve the health of students, employees, and residents, respectively. Just as the [[randomized clinical trial (RCT)]] is the gold standard in public health and medicine when allocation of individual participants is possible, the GRT is the gold standard when allocation of identifiable groups is necessary.