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Durham Research Online
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The Verification of Ecological Citizen Science Data: Current Approaches and Future Possibilities

Baker, E.R. and Drury, J.P. and Judge, J. and Roy, D.B. and Smith, G.C. and Stephens, P.A. (2021) 'The Verification of Ecological Citizen Science Data: Current Approaches and Future Possibilities.', Citizen Science: Theory and Practice, 6 (1). pp. 1-14.

Abstract

Citizen science schemes enable ecological data collection over very large spatial and temporal scales, producing datasets of high value for both pure and applied research. However, the accuracy of citizen science data is often questioned, owing to issues surrounding data quality and verification, the process by which records are checked after submission for correctness. Verification is a critical process for ensuring data quality and for increasing trust in such datasets, but verification approaches vary considerably between schemes. Here, we systematically review approaches to verification across ecological citizen science schemes that feature in published research, aiming to identify the options available for verification, and to examine factors that influence the approaches used. We reviewed 259 schemes and were able to locate verification information for 142 of those. Expert verification was most widely used, especially among longer-running schemes, followed by community consensus and automated approaches. Expert verification has been the default approach for schemes in the past, but as the volume of data collected through citizen science schemes grows and the potential of automated approaches develops, many schemes might be able to implement approaches that verify data more efficiently. We present an idealised system for data verification, identifying schemes where this system could be applied and the requirements for implementation. We propose a hierarchical approach in which the bulk of records are verified by automation or community consensus, and any flagged records can then undergo additional levels of verification by experts.

Item Type:Article
Full text:Publisher-imposed embargo
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Available under License - Creative Commons Attribution 4.0.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.5334/cstp.351
Publisher statement:© 2021 The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.
Date accepted:12 January 2021
Date deposited:16 February 2021
Date of first online publication:13 April 2021
Date first made open access:14 April 2021

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