Update 18 March 2013 - Paper now online. Humans are approximate creatures, we aren’t precise, and if this blog is anything to go by, we aren’t concise either! So then why do we persist in pursuing work which is ever more precise using tools which are sold on their precision. Eye-tracking is just one example of this - an individual gaze plot maybe precise, but start to add participants and you get gaze-spaghetti; nothing precise there.