Edutopia – John McCarthy
“Several studies from the 1970s on have looked into the effect that the amount of time teachers pause after asking a question has on learners. In visiting many classrooms in the United States and other parts of the world, I’ve found that, with few exceptions, these studies are still accurate. For example, according to work done by Mary Budd Rowe in 1972 and Robert J. Stahl in 1994, pausing for three or more seconds showed a noticeable positive impact on learning. Yet the average length that teachers pause was found to be 0.9 seconds.”(more)