Estrada, Mica; Woodcock, Anna; Schultz, P. Wesley - In: Evaluation Review 38 (2014) 1, pp. 3-28
Many psychological processes unfold over time, necessitating longitudinal research designs. Longitudinal research poses a host of methodological challenges, foremost of which is participant attrition. Building on Dillman’s work, we provide a review of how social influence and relationship...