Submitted by Neil Cohn on April 16, 2008 - 11:43
1.5 seconds per panel. That's how long it takes on average for wordless panels to be read.
I recently completed a very exciting study that asked people to read four-panel comic strips one panel at a time. In this "Self-Paced Reading" task, they see four boxes on the screen, and with each button press a subsequent panel appears in the sequence. Only one panel is shown on the screen at a time.