Psychologyspeaking topic

In a pitch-dark room your eyes eventually start to 'see': shapes that aren't there, drifting specks. When no data comes in, why doesn't the brain leave the void empty instead of generating its own images? How much of what we see comes from outside, and how much from within?

perceptual filling-in, sensory deprivation

practice with this topic

Set the timer (5-30 min), take 20 seconds of prep if you like, start talking. Jot your thoughts onto the sticky-note board.