Haake, Joerg M.Seidel, NielsBurchart, MarcKarolyi, HeikeKasakowskij, ReginaKienle, AndreaHarrer, AndreasHaake, Joerg M.Lingnau, Andreas2021-08-252021-08-252021978-3-88579-710-4https://dl.gi.de/handle/20.500.12116/36995Self-assessment serves to improve learning through timely feedback on one's solution and iterative refinement as a way to incrementally improve one's competence. The SelfAssess-plugin developed in Moodle provides unlimited opportunities for students to create and assess solutions to self-assessment questions. A field study examined how 131 students used voluntary self-assessment questions in an online course in B.Sc. Computer Science, how accurate they were able to self-assess their solutions on instructor-defined criteria, and which question-related characteristics influence the ability of self-assessment. Results show the potential for providing scalable learning support. Fine-grained assessment criteria and freedom of solution input are recommended; a limited complexity of the expected solution is still a challenge.enself-assessment accuracycomputer-assisted feedbackcriteria-based self-assessmentText/Conference Paper1617-5468