How do you measure imagination? And are some imaginations more creative than others?
Forward flow is a way to quantify the forward motion of naturalistic thought. Research suggests that it is correlated with creativity. You can learn more about it here, see your own forward flow, or upload a file to get the forward flow of many people.
Forward flow and its link to creativity is explored in this American Psychologist paper, which can be read as an open access preprint. Data and materials found at OSF.