Rayyan ranked first in an independent third party study for its combination of accuracy and sensitivity when performing deduplication of references.
To Detect duplicates in Rayyan, follow the steps below:
1. Visit the Review Data Screen.
2. Click Detect Duplicates.
After you have imported all your references collected from various sources into Rayyan, you will want to initiate the deduplication process by clicking the Detect duplicates button.
2. Click Proceed.
3. You will see the Detecting Duplicates status message appear.
Once duplicate detection has completed, you will see the message: n duplicates found. You will also see the Possible Duplicates facet Under the Imported References section.
4. Under Possible Duplicates, click Unresolved to filter by unresolved duplicates.
5. Click on the record you wish to resolve.
6. Click Resolve Duplicates.
7. The detected duplicates will be listed side by side, each with a confidence percentage. Compare these duplicates and choose to keep the left, right, or both articles. Selecting "Keep Left Article" will result in the deletion of the right article, and vice versa.
You can see that the counts will be updated on the Possible Duplicates facet. You might need to refresh the page to get the latest update.
In addition, Rayyan offers subscribers the Systematic Auto-Resolver feature. The Systematic Auto-Resolver enables you to select and combine your own deduplication criteria. To use it, follow these instructions:
8. Run the Systematic Auto-Resolver.
Please note, if your membership does not grant you access to this feature, you will be prompted to update your membership to obtain access.
9. Select the Duplicate Resolving Criteria and Percentage to Auto-resolve.
The duplicate resolving criteria consist of Title, Author, Journal, Year, Pages, DOI number. By selecting any of these criteria, Rayyan will compare references for exact matches and automatically resolve them as duplicates.
An additional criteria is available to compare the overall similarity percentage of the references. So, if you select an overall similarity percentage of 80%, the Systematic Auto Resolver will deduplicate all references that are at least 80% similar.
Rayyan will make sure that all criteria that you select is true before automatically resolving duplicates.
If you combine the Overall Similarity Percentage with the exact match criteria, it will provide you with additional safeguards to ensure the most precise deduplication possible.
10. If you use the Overall Similarity Percentage criteria, you will receive a message to confirm you would like to proceed. Select Cancel or Resolve Anyway to run the Auto-Resolver.
Please be advised that you won't be able to undo this action once you confirm. All the duplicates of the percentage you selected and higher will be resolved all at once, which means one copy of the article will be moved to Resolved and the remaining copies will be Deleted. Again, please be advised that you won't be able to undo this action once you confirm.
11. Pay attention to the notifications.
Rayyan will start processing all the references and will notify you of the start and end of the process and report the results.
12. View the results.
The Auto-Resolver will automatically populate the Resolved articles filter under the Possible Duplicates facet with the articles it kept, and move the duplicate copies to the Deleted filter.
The icon appearing beside the percentages indicate that the respective references are Auto-Resolved duplicates, while the references without it are those that have been resolved manually.
Please note that some features are available only with certain memberships. Please always check the memberships page to determine if your current membership includes a specific feature. If you would like to change your membership, please visit change my membership.