This study introduces a Comprehensive Scientific Creativity Assessment (C-SCA) instrument and empirically tests its reliability and validity. While existing instruments to measure scientific creativity generally focus on a single dimension, such as divergent thinking, the C-SCA incorporates scientific knowledge, motivation in scientific creativity and thinking styles within its assessment framework. In this study, the three dimensions of C-SCA were measured using modifications of existing instruments. We provide two versions of the test, to allow tests of the effectiveness of educational interventions on scientific creativity. We incorporated ChatGPT into the scientific creativity scoring process to enhance the objectivity of the scores. Looking ahead, technological advancements hold promise for further improvements in scientific creativity assessment.