The Gradients of Agreement Scale was developed in 1987 by Sam Kaner, Duane Berger, and the staff of Community At Work.
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It enables members of a group to express their support for a proposal in degrees, along a continuum. Using this tool, group members are no longer trapped into expressing support in terms of "yes" and "no."
The book «Facilitator's Guide to Participatory Decision-Making» has been translated into Spanish, French, Russian, Mandarin, Arabic ana Swanili, and it has been used in organizations large and small throughout the world.
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Gradients of agreement scale Wikipedia(Text) CC BY-SA