trip. Before cursing your faulty powers of recollection, consider the possibility of a different (and scientifically documented) reason for the lapse: walking through doorways causes you to forget because the abrupt change in your physical surroundings redirects your attention to the new setting—and consequently from your purpose, which disrupts your memory of it. I like this finding because it offers a less personally worrisome account of my own forgetfulness. I get to say to myself, “Don’t worry, Cialdini, it wasn’t you; it was the damned doorway.”

