A black frame is inserted into a scene, and multiple objects in the background are changed. Most viewers fail to notice these changes because they are focused on the central action.
This is the failure to notice a fully visible, but unexpected, object or event because attention was focused on another task. [S1E2] Pay Attention
For students or teachers using this episode as a learning tool, typical viewing guides focus on these critical thinking areas: A black frame is inserted into a scene,
The brain functions like a spotlight in a dark room; it illuminates one area vividly while leaving the rest in the dark. [S1E2] Pay Attention
Identifying the specific roles of David Copperfield and the neuroscientists in the episode.