Martijn Willemsen Martijn Willemsen researches the cognitive aspects of Human-Technology Interaction, with a strong focus on judgment and decision making in online environments. His applied research focuses on how online decisions can be supported by recommender systems, and includes domains such as movies, health related decisions and energy-saving measures. From a more theoretical perspective, he has a special interest in process tracing technologies to capture and analyze in detail information processing of decision makers.

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dear visitor, you have reached the main page of, a website hosted by Martijn Willemsen. This website is mostly used for running studies from the HTI group. The HTI group is part of the school of innovation sciences of Eindhoven University of technology, and hosts a bachelor program in Psychology and Technology and a master program in Human-Technology Interaction. Students from these programs also run online studies via