You can see a list of activity done by the participants related to logins, documents downloaded/opened and Q&A. You can modify the list selecting specific people and also change the date range: Last 24 hours, Last 7 days, Last 30 days, Last month, Since project creation and custom range.
1. Click on Admin
2. Click on Intelligence and select Reporting
3. Click on Activity Feed
4. You can change the list to look for all or specific activity, for everyone on the project or for a specific people and specify a date range