Robert B Cotter
Affiliation: University of Pittsburgh
- Predictors of contact difficulty and refusal in a longitudinal studyRobert B Cotter
Western Psychiatric Institute and Clinic, University of Pittsburgh, Medical Center, Pittsburgh, PA 15213, USA
Crim Behav Ment Health 15:126-37. 2005..Participant loss threatens both the internal and external validity of research findings. This study sought to examine predictors related to contact difficulty and refusals in a longitudinal study...