Psychological research has a long track record of developing tools for our understanding of mental processes. Prominent among these tools are the measurement of the duration of cognitive processes (mental chronometry) and the localization of these processes in the brain (cognitive neuroscience). Somewhat less prominent, but undeservedly so, is eye movement recording or eye-tracking. Eye-tracking has a century-old history (Wade & Tatler,
2005) that has recently culminated in the widespread availability of relatively affordable and low-effort tools for the unobtrusive study of visual exploratory behaviour (e.g., Holmqvist et al.,
2011). …