601. Multitasking Doesn’t Work. So Why Do We Keep Trying?

Episode Summary

Executive Summary: The episode argues that multitasking is mostly a myth: most people rapidly switch attention rather than truly perform tasks simultaneously, and that switch costs lower productivity and raise stress. Using research from David Strayer and Gloria Mark, plus a Slack product manager’s perspective, it shows how modern workplaces and software intensify attention fragmentation while only a small minority—supertaskers—can handle dual demands well. It ends with practical solutions at individual, organizational, and policy levels.

Main Topics: Multitasking as task-switching, not simultaneous performance (Priority: 5/5): David Strayer explains that what people call multitasking is usually rapid switching between tasks, which creates cognitive switch costs and degrades performance on both tasks. Attention span decline in digital work (Priority: 5/5): Gloria Mark’s workplace studies show average uninterrupted screen attention dropped from about 2.5 minutes in 2003 to 75 seconds in 2012, reflecting a more fragmented information environment. Supertaskers are rare exceptions (Priority: 4/5): Strayer’s research suggests only about 2.5% of people can truly handle two demanding tasks at once without performance loss; these outliers may have distinctive neural efficiency. Slack and the paradox of productivity tools (Priority: 4/5): Olivia Grace, a Slack product manager, argues Slack helps prioritize communication, but the show also frames it as a source of constant interruption and induced demand for attention. Stress, errors, and the costs of interruption (Priority: 5/5): The episode links frequent switching to more errors and higher stress, demonstrated through a live attention test on Dubner that quickly becomes overwhelming. How to protect attention (Priority: 4/5): Mark offers remedies at multiple levels: individual meta-awareness and forethought, organizational quiet times and batched email, and societal measures like right-to-disconnect laws and media literacy.

Key Arguments: Multitasking is usually not parallel processing; it is sequential attention switching with measurable switch costs. Performance tends to decline as soon as people try to combine even familiar tasks, especially when tasks require attention. Most people are not good multitaskers, even if they believe they are; the perception of productivity often exceeds the reality. Frequent task switching increases stress, not just mistakes and time loss. Only a tiny minority of people qualify as true supertaskers, and their abilities may be partly innate rather than trainable. Modern collaboration software can improve prioritization, but it also increases notification-driven interruption and expectation of constant responsiveness. Solutions require more than individual discipline; organizations and governments can redesign expectations around attention and availability.

Data Points: Average attention span on screens (2003): About 2.5 minutes - Gloria Mark’s early workplace shadowing study of information workers Average attention span on screens (2012): About 75 seconds - Later computer-logging study showing a decline in uninterrupted focus Supertasker prevalence: About 2.5% - David Strayer and Jason M. Watson’s testing of multitasking ability Stress scale baseline: 4/10 - Stephen Dubner’s self-rating before the multitasking stress test Stress scale after task-switching test: 19 - Dubner’s joking assessment after being overwhelmed by concurrent tasks Market valuation of Slack acquisition: Around $28 billion - Salesforce’s 2021 purchase of Slack Year of initial workplace attention study: 2003 - Gloria Mark began shadowing workers with a stopwatch Year of later attention study: 2012 - Mark’s logging-software study of attention spans Approximate number of people tested in one online supertasker version: About 10,000 - Strayer’s worldwide online testing of multitasking ability Example quiet-time window: 2–4 p.m. - Organizational strategy suggested to reduce interruptions

Pivotal Quotes: "what we're really doing is switching our attention between task one and task two and task one and task two." — David Strayer: Explaining why multitasking is usually sequential rather than simultaneous "But as soon as you start to multitask, performance on both of the tasks start to degrade." — David Strayer: Describing the core cognitive cost of dual-tasking "I think that multitasking is essentially a myth." — Olivia Grace: Slack product manager describing her view after reviewing attention research

Implications: The episode suggests most workers should stop expecting themselves or others to juggle constant inputs. Better design, clearer norms, and protected focus time may improve productivity, reduce stress, and make technology serve human attention rather than fragment it.