Dephasing Rate is a way to measure how quickly something is becoming "unsynchronized", like people clapping out of time at a concert. The Dephasing Rate Sp Formula is a way to calculate how quickly something is "falling out of sync". To do this, you first need to measure the time it takes for something to go from being correct or synchronized to becoming "out-of-sync". Then divide this time by the total time something was synchronized. The formula looks like this: Dephasing Rate Sp = Time Out-of-Sync / Total Synchronized Time. So if it takes 5 seconds to go from being perfectly in-sync to perfectly out-of-sync and it was together for 10 seconds, then the De-Phasing Rate Sp would be 0.5 (5 seconds out-of-sync / 10 seconds total synchronized time).