Have attention spans been declining?

Have attention spans been declining?
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Even something as "simple" as working in a pizza place, say Domino's, is increasingly a frantic assembly line where orders can come at a breakneck pace through internet applications.

You'll still be working somewhere perpetually understaffed and who give you basically no training, but expect you to pay attention to multiple threads at once, all day long. You're a delivery driver, but you're also expected to do kitchen prep, take phone orders, take in-person orders, do dishes, cut and box pizzas, help on the prep line and generally be on-call for anything else needed to be done in the store.

When your workflow is literally constantly being interrupted by other parts of the workflow, because you're always expected to be paying attention to multiple parts of the workflow, you lose the ability to focus on just one thing for an extended period.

Anyway, that's my two cents, it's not just social media, phones and screens. It's also a way of life in America, to be expected to manage numerous expectations all at once and always be on your feet moving. If you can't do it, you're likely to lose your (shitty) job, so forcing yourself to be able to focus on numerous things at once without giving your whole focus to one thing is literally pounded into your head in your workplace.