This lecture introduces a test designed to assess computational thinking skills, focusing on problem-solving processes and their representation for effective execution by information-processing agents. The test's development, inspired by various sources, is discussed along with the analysis of previous tools and the design of test items. The lecture also covers the test's structure, including a sample question, and the results of a study comparing EPFL students with social science students. The presentation concludes with insights on the test's dimensionality and its implications for evaluating computational thinking.