The Sense of Order A Book by E. H. Gombrich The Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy perceptionartorder
The observer effect In biology, when researchers want to observe animals in their natural habitat, it is paramount that they find a way to do so without disturbing those animals. Otherwise, the behavior they see is unlikely to be natural, because most animals (including humans) change their behavior when they are being observed. Farnam Street fs.blog The Spoken and the Unspoken uxethnography