What is another name for a group allocation design?

What is another name for a group allocation design?

• A. Block randomization
• B. Crossover randomization
• C. Cluster randomization
• D. Stratified randomization

Answer: (C)

Group allocation designs involve assigning interventions to whole groups rather than to individuals. This is exactly what cluster randomization does: entire clusters (like clinics, schools, or communities) are randomized to different treatment arms, and every participant within a cluster follows that assignment. This approach keeps care within a cluster consistent and can reduce contamination between arms, and it often reflects how an intervention would be implemented in the real world. To contrast with other designs briefly: block randomization focuses on keeping the number of participants in each arm balanced within small blocks of randomization; crossover randomization has participants receive multiple treatments in a sequence (with washout periods in between); stratified randomization randomizes individuals within subgroups defined by baseline characteristics. All involve individuals, whereas cluster randomization is about randomizing groups, which is why it’s the term that fits “group allocation design.”

Group allocation designs involve assigning interventions to whole groups rather than to individuals. This is exactly what cluster randomization does: entire clusters (like clinics, schools, or communities) are randomized to different treatment arms, and every participant within a cluster follows that assignment. This approach keeps care within a cluster consistent and can reduce contamination between arms, and it often reflects how an intervention would be implemented in the real world.

To contrast with other designs briefly: block randomization focuses on keeping the number of participants in each arm balanced within small blocks of randomization; crossover randomization has participants receive multiple treatments in a sequence (with washout periods in between); stratified randomization randomizes individuals within subgroups defined by baseline characteristics. All involve individuals, whereas cluster randomization is about randomizing groups, which is why it’s the term that fits “group allocation design.”