Engagement and Retention: Measuring Breadth and Depth of Participant Use of an Online Intervention

by Couper, Mick P, Alexander, Gwen L, Zhang, Nanhua, Little, Roderick JA, Maddy, Noel, Nowak, Michael A, McClure, Jennifer B, Calvi, Josephine J, Rolnick, Sharon J, Stopponi, Melanie A, Cole Johnson, Christine
Published 2010-11-01