Interactive Track
- Task: each searcher had 20 minutes to save documents covering as many different aspects of the topic as possible
- collection: Financial Times and 8 ad hoc topics
- evaluation: aspectual recall and precision
- Track used common experimental framework, though did not test a common hypothesis
- latin square design to provide an estimate of the difference between experimental and control system that is uncontaminated by differences in searchers and topics
- minimum of eight searchers suggested by TREC-6 track