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group sequential design

a research design in which a treatment is randomly assigned to different groups at varying times, such that every group receives the treatment eventually. A group sequential design is useful when it is important for each participant to have an opportunity to benefit from the treatment, but a comparison group nonetheless is required: The portion of the sample that receives the treatment later acts as a control group initially.

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Psychology term of the day

July 27th 2024

Delphi technique

Delphi technique

a method of developing and improving group consensus by eliminating the effects of personal relationships and dominating personalities. Conflict is managed by circulating a questionnaire, which is edited and summarized on the basis of the last round of comments and then reissued for further response by those participating in the survey. The Delphi technique is used in many situations where convergence of opinion is desirable (e.g., for defining goals, setting standards, or identifying and ranking needs and priorities).