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Hild, Pitt; Gut, Christoph; Brückmann, Maja – Research in Science & Technological Education, 2019
Background: Several different measures have been proposed to solve persistent validity problems, such as high task-sampling variability, in the assessment of students' expertise in 'doing science'. Such measures include working with a-priori progression models, using standardised item shells and rating manuals, augmenting the number of tasks per…
Descriptors: Performance Based Assessment, Science Tests, Science Process Skills, Test Validity