CONTENT-VALID DIAGNOSIS OF KNOWLEDGE AND PROBLEM-SOLVING - DEVELOPMENT, TEST THEORETICAL JUSTIFICATION AND EMPIRICAL VALIDATION OF A NEW PROBLEM-SPECIFIC TEST

The present paper deals with the quantitative assessment of knowledge. The article focusses on the development and validation of a system-sp ecific knowledge-test aimed at the problem-solving scenario <<tailor s hop>>. The method of content-valid test construction was chosen. The r ationality of this choice is based on test-theoretical criteria as wel l as on the applicability of this method for modern computer-based pro blem-solving tasks. Above and beyond the test-theoretical explanations and descriptions of the technical aspects of the test construction pr ocess, the article focusses on the validation of the test in a study o n 198 high school students and (for a part of the tasks) a replication with about half of the original sample.