Please note that, if a Blackboard course has both Blackboard assignments with Turnitin enabled and Turnitin LTI submission points in it, and a student submits similar work to both, the similarity scores for the later submission may be higher, due to it matching the earlier one. This can occur when, for example, a student’s summative submission is based on their previous formative submission. The supplier is aware of this issue and is currently working on a fix.
You can avoid this issue by ensuring that, within one course, you either use Turnitin LTI submission points or Ultra assignments with Turnitin enabled, but not both.
If you have experienced this issue and need assistance updating the similarity reports, please get in contact with us by emailing us at digital-education@bristol.ac.uk.