Why is the actual time elapsed greater than the duration?

The example shows an actual time elapsed (10.4s) that is greater than the specified duration (10s). This is expected. We can only check how much time has elapsed when the player successfully answers a question and so time may have “expired” while they were in the process of answering an equation, i.e. they started before time “expired”, but did not finish until afterwards. (See also A note about timing in the lab write-up.)