holds a small number of items for a short time and is the in most thinking.
Its has not changed, while the number of things competing for it has.
between tasks is not free, and the cost is paid twice.
Some of the previous task remains active, and the new task starts without full resources.
Laboratory estimates of the cost look small until they are multiplied by the number of switches in a working day.
The presence of a phone is enough to reduce performance even when it is not used.
Part of the mind is occupied with not looking at it.
Experiments that moved the phone to another room found a larger effect than turning it off in the same room.
The practical implications are physical rather than moral.
Advice to concentrate harder ignores where the actually goes.
Environments that protect attention share a few features and none of them involve .
are off by default rather than by choice.
Meetings have a fixed window so the rest of the day is .
Written updates replace the interruptions that a question would otherwise create.
None of this is new, and it is consistently the first thing abandoned when a team is busy.