In today's fast-paced world, our brain spends almost half of our waking hours distracted from current environmental stimuli, often referred to as mind wandering in the scientific literature. At the same time, people frequently have several hours daily screen time, signifying the ubiquity of digital technologies. Here, we investigate mind wandering while using digital technologies. Measuring mind wandering (i.e., off-task thought), however, comes with challenges. In this researchin-progress paper, we present an experimental approach based on EEG, eye-tracking, C. Reßing (B) •