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![Cover for Armin Berger · Validating Analytic Rating Scales: A Multi-Method Approach to Scaling Descriptors for Assessing Academic Speaking - Language Testing and Evaluation (Inbunden Bok) [New edition] (2015)](https://imusic.b-cdn.net/images/item/original/913/9783631666913.jpg?armin-berger-2015-validating-analytic-rating-scales-a-multi-method-approach-to-scaling-descriptors-for-assessing-academic-speaking-language-testing-and-evaluation-inbunden-bok&class=scaled&v=1553202317)