Gudjonsson suggestibility scale

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The Gudjonsson Suggestibility Scale (GSS) is a test that tries to measure how susceptible a person is to coercive interrogation. It was created by Gisli H. Gudjonsson, and it relies on two different aspects of interrogative suggestibility: yielding to leading questions; and shifting responses when interrogative pressure is applied. The test consists of a narrative paragraph read to the subject, who then reports all they can remember about the story. Later, the subject is asked a number of questions about the story, some of which are incorrect. Then, the person being tested is told in a forceful manner that they have made a number of errors and must answer the questions for a second time. Yielding refers to susceptibility to suggestive questioning. Shifting refers to changing answers as a result of interrogative pressure.