Citizen Science (CS) is related to public engagement in scientific research. The tasks in which the citizens can be involved are diverse and can range from data collection and tagging images to participation in the planning and research design. However, little is known about the involvement degree of the citizens to CS projects, and the contribution of those projects to the advancement of knowledge (e.g. scientific outcomes). This study aims to gain a better understanding by analysing the SciStarter database. A total of 2,346 CS projects were identified, mainly from Ecology and Environmental Sciences. Of these projects, 91% show low participation of the citizens (Level 1 "citizens as sensors" and 2 "citizens as interpreters", from Haklay's scale). In terms of scientific output, 918 papers indexed in the Web of Science (WoS) were identified. The most prolific projects were found to have lower levels of citizen involvement, specifically at Levels 1 and 2.

翻译：公民科学（CS）涉及公众参与科学研究。公民可参与的任务形式多样，包括数据收集、图像标注以及参与研究规划与设计。然而，关于公民在公民科学项目中的参与程度，以及这些项目对知识进步（如科学成果）的贡献，我们仍知之甚少。本研究通过分析SciStarter数据库，旨在更好地理解这些问题。研究共识别出2,346个公民科学项目，主要来自生态学与环境科学领域。其中，91%的项目显示公民参与度较低（处于Haklay量表的第1级“公民作为传感器”和第2级“公民作为解释者”）。在科学产出方面，研究确定了918篇收录于Web of Science（WoS）的论文。发现产出最多的项目具有较低的公民参与水平，具体表现为第1级和第2级。