Here, he does social-psychological research, but is increasingly occupied with the methodology and reliability of science in itself. Until recently, he was still involved in a large international project in which notable psychological studies were repeated. Last year NWO decided, partly due to his insistence, to release three million euros for studies of this kind. With the Vidi that Lakens will now receive, he is keen to research how psychologists can generate empirical knowledge as efficiently as possible, taking account of both statistical aspects and the resources and aims of researchers. He hopes this will lead to recommendations that will make psychological research both more reliable and more efficient.