At the "Research & QA" section at the top menu, you can find the detailed statistic of every member of your team for the period you'd like.
Here you can see the daily stat about:
- amount of processed items
- amount of worked hours
- percent of items marked as Good (green) and Bad (red)
- percent of mistakes/errors (orange, according to the final decision about the item)
You also can download the report by clicking the "Download" button at the top right.