Tobias is interested in optimization and optimal decision-making: in particular how to act optimally when individual decisions have uncertain outcomes and far-reaching consequences. Knowing that his own abilities in this area are rather limited, he focuses his research on how these problems can be solved automatically and computationally. His thesis (nominated for the GI National Dissertation Prize) describes a novel and highly sample efficient online algorithm for reinforcement learning that is specifically aimed at learning in high-dimensional continuous state spaces. Some of his other work includes multivariate time series prediction, sensor evolution and curiosity-driven learning.