In the row of the feedback item you want to view, click the view link.

This displays feedback for all students.

1. In the Username column, those students who have not checked their feedback are shown in bold and red.
2. The Last Checked column shows when (if ever) the student last checked their feedback.

Select the student's username from the drop-down menu next to Select a Participant.

This displays the individual student's feedback for the PostEm item.