The flowchart starts from the top with a rectangle with text: “Search ‘citizen science’ OR ‘citizen scientist’ in three databases (Taylor and Francis Online, Scopus, and Web of Science (WoS)).” A downward-pointing arrow from this rectangle points to a horizontal rectangle containing three text boxes arranged in a horizontal series. From left to right, these are labeled as follows: “Taylor and Francis Online - 191 articles,” “Scopus - 5708 articles,” and “Web of Science (WoS) - 4,120 articles.” A downward-pointing arrow from this rectangle leads to a large rectangle containing a paragraph of text: “A manual review of the titles, abstracts, introductions, and methodology sections of all articles was conducted to determine whether the articles focused on citizen science and the built environment. Additionally, journal titles were checked to identify any relevant articles that may have been overlooked.” To the right of this rectangle, two smaller text boxes are connected with lines. They are labeled as follows: “Criteria 1: Citizen science research” on the top and “Criteria 2: Built environment related?” below it. Another downward arrow from the large rectangle leads to a rectangle with text: “107 articles were published in 52 journals.” A final downward-pointing arrow connects to the last rectangle, which reads: “Analysis by CiteSpace software and Content Analysis.”Research procedures. Source: Authors’ own work