How might data be collected for this target response?I would do check in meetings with the staff as a group and individually to find out where the general motivational deficit is.
Identify several interventions that might help improve response rates. Place them in order with the least-restrictive at the top so that the interventions may be introduced systematically, adding more restrictive / less favorable interventions after the outcomes of less restrictive options have been measured.

-Have a group goal contingency and post general progress to the goal
-Have a group challenge to see who can run the most trials of important programs and post individual progress throughout the week
-Provide feedback during session to individuals as needed to remind them to stay on task and stick with client programming