Con inmensa gratitud por su apoyo constante, facilitador de oportunidades, profesor José Ismael Peña-Reyes y a Erik De Graaff quien, como un amigo, fue una fuente inspiradora y alentadora para comenzar esta investigación.

An experiment was conducted in the context of a problem-based learning course to investigate the influence of a learning-goal-free problem scenario on the quality and quantity of individual study. In half of the tutorial groups, the problem scenario was constructed in such a way that it provided useful learning issues (goal-specified condition), whereas in the other half of the tutorial groups, the problem scenario did not provide learning issues (goal-free condition). It was demonstrated that students in the goal-free condition read more articles, studied longer, and spent more time reporting the studied literature than their peers in the goal-specified condition. These findings suggest that the use of goal-free problems has a positive effect on the students' individual study and the extensiveness of the tutorial group meeting.