owever, it isimportant to distinguish between generic job categories andthe specification of tasks performed; the contributorshipmodel is designed to record each individual’s actual input(e.g., experimental design, data collection, statistical analy-sis, final article revision), not job title (e.g., coprincipalinvestigator, technician, systems analyst), since the lattermay on occasion mask or inflate the former (Stern, 2000).