Notification Fatigue Research

“It takes 23 minutes to refocus after an interruption”

Landmark research showing that after each interruption, workers need an average of 23 minutes and 15 seconds to return to the original task. Updated studies suggest the figure may be even higher in modern open-office, always-on environments.

“Knowledge workers average only 2hr 48min of productive work per day”

Analysis of millions of hours of computer usage data found that the average knowledge worker gets less than 3 hours of truly productive work done per day, with the rest consumed by communication overhead and context switching.

“Average employee spends 31 hours/month in unproductive meetings”

Research across thousands of teams showed that nearly a full work week per month is lost to meetings that employees consider unproductive, many of which generate additional notification churn.

“Employees check email 74 times per day”

HBR research found that the average professional checks email 74 times per day, with each check creating a micro-interruption that fragments attention even when no action is needed.

“Workers spend 32% of their day in messaging apps”

Slack's own research revealed that nearly a third of the workday is spent in messaging applications. While some messaging is productive, much of it is low-value chatter that could be batched or eliminated.

“57% of time spent in meetings/email/chat, 43% in creation apps”

Microsoft's analysis of productivity signals across their platform showed that the majority of time is spent on communication rather than actual creation work, representing a fundamental imbalance.

“Every shallow interruption costs 15-23 minutes of deep work”

Newport's synthesis of cognitive research demonstrates that shallow interruptions — even brief ones — carry a significant attention residue cost, making sustained deep work nearly impossible in notification-heavy environments.

“60% of work time is coordination, not skilled work”

Asana's annual survey found that 60% of knowledge workers' time goes to "work about work" — status updates, searching for information, switching between apps, and managing notifications — rather than the skilled work they were hired to do.

“Multitasking reduces productivity by up to 40%”

Stanford researchers found that heavy multitaskers — those who frequently switch between notification streams — performed worse on every measure of cognitive control, including filtering irrelevant information, organizing working memory, and switching tasks.

“Interruptions cost the US economy $588 billion per year”

One of the earliest large-scale economic analyses of interruption costs, estimating that unnecessary interruptions and the recovery time they demand cost the US economy hundreds of billions annually. Adjusted for current salaries, the figure is likely significantly higher.