When Andrea Gilmore-Bykovskyi, an associate professor in emergency medicine at the University of Wisconsin-Madison, saw that the N.I.A. was interested in video research on lucid episodes, she knew one way to approach the problem. Her past work had involved filming people with dementia during interactions with nursing staff and then meticulously analyzing the videos, second by second, to assess which types of care affected patients’ behavioral symptoms. She proposed retooling those video methods to study lucidity.