Tsukuba, Japan—During deep sleep, brain wave amplitude increases, and "δ (delta) power," a key objective indicator of sleep quality, is observed; higher delta power corresponds to deeper, more ...

Multitasking usually lowers productivity because most people are “task switching,” which creates a mental “switch cost” that slows processing and reduces accuracy. Switching between tasks strains ...

So why do so many of us still try to multitask? We’re too busy with too much to do and too little time to do it in. The temptation to accomplish multiple things at the same time is practically ...