Hey,

This is the 22nd weekly update from revision scoring team that we have sent to this mailing list.

UI work:

• We configured the default threshold for the ORES review tool on Wikidata to be more strict (higher recall, lower precision)[1]

• We fixed a display issue on Special:Contributions where the filters would not wrap[2]

Increasing model fitness:

• We finished demonstrating model fitness gains using hash-vector features[3].  Next, we'll be working to get the hash-vector features implemented in revscoring/ORES[4].

• We implemented a new strategy for training and testing on all data using cross-validation[5].  This will both increase the fitness of the models and make the statistics reported more robust.

Maintenance and robustness

• We fixed an indexing issues in ores_model that prevented the deployment of updated models[6].

• We did a minor investigation to a short period of degraded service quality on WMF Labs[7]

1. https://phabricator.wikimedia.org/T144784 -- Change default threshold for Wikidata to high

2. https://phabricator.wikimedia.org/T143518 -- Filter on user contribs has nowrap, causing issues

3. https://phabricator.wikimedia.org/T128087 -- [Spike] Investigate HashingVectorizer

4. https://phabricator.wikimedia.org/T145812 -- Implement ~100 most important hash vector features in editquality models

5. https://phabricator.wikimedia.org/T142953 -- Train on all data, Report test statistics on cross-validation

6. https://phabricator.wikimedia.org/T144432 -- oresm_model index should not be unique

7. https://phabricator.wikimedia.org/T145353 -- Investigate short period of ores-web-03 insanity 

Sincerely, 

Aaron from the Revision Scoring team