Neuroscientist's Guide To 10X Your Focus & Memory
Guest: Dr Sahar Yousef, Cognitive neuroscientist (UC Berkeley, "Becoming Superhuman" lab) | Host: Raj Shamani | Show: Figuring Out, episode FO559
Raj asks a Berkeley neuroscientist how to train focus, memory and motivation. This summary is organized by topic and kept to the point: belief and the identity template, when-then plans, breaking habits, phones and IQ, multitasking, boredom and ideas, short vs long-form media and loneliness, the "brain as a city" map, chronotypes and sleep, burnout and the 3M break framework, an unpublished 9-week Berkeley study, and her personal story.
- Neuroplasticity
- Default Mode Network
- Implementation intentions
- Digital hygiene
- Task switching
- Bloom scrolling
- Chronotypes
- Stress cycles
- 3M breaks
- 17.72s → 41.35s
- Raj's time on the multitasking test (more than double, with many mistakes)
- Phone visible = lower IQ
- UT Austin study: a dead, face-down phone still lowered attention and fluid intelligence
- ~10-15%
- of people are PM-shifted (night owls); the majority are biphasic
- 9 weeks, 450 students
- Less lonely, depressed and anxious; better attention and working memory
Dr Sahar Yousef, a cognitive neuroscientist who runs UC Berkeley's "Becoming Superhuman" lab, explains how to train focus, memory and motivation. Her answer, boiled down:
- Your brain follows biological laws, like physics. Achievers don't have different brains; they learn the laws and leverage them.
- Write the story of who you're becoming and review it daily. Your brain's storyteller (the Default Mode Network) shapes what you notice. Back it with detailed when-then plans.
- Break a habit at the feeling, not the behavior. Pause, name what you're feeling, then do something tiny instead (60 seconds with your eyes closed).
- A visible phone lowers your IQ, even when it's switched off. Every attention switch costs time and energy. Multitasking doesn't exist.
- Be bored on purpose. Ideas need empty space. Short-form media leaves no memory and raises anxiety and loneliness.
- Work with your chronotype, close your stress cycles, and take micro, meso and macro breaks.
- Modern life and work go against our biology, which is why people have brain fog, burn out and miss their goals despite "working non-stop."
- The laws she cares about cover motivation, goal achievement, focus, distraction management and energy management. Get these wrong and great goals won't matter.
- Physics is the same for everyone; Elon Musk just uses it to send rockets to space. The same goes for the brain: the key word is following the laws.
- An Olympic hopeful who skips training, mismanages energy and quits after 3 weeks isn't going to the Olympics. Treat your goals the same way.
- Have "main character energy." Telling yourself "people like me have done it, I'm going to make it" isn't romantic; it's how you train the brain out of a victim mindset.
- Attentional redirection: when your mind starts the "I'm a victim, what if I fail?" story, tell it to "zip it" and move your attention back to the story you want. Repeat it daily, "obsessively."
- Write the story down from the perspective of a future you who already believes in themselves. You don't have to believe it at first.
- The Default Mode Network (DMN) is the brain's narrator: who am I, what are my stories. It influences the brain's attention and executive areas, so your stories shape what you see.
- "Baggage" is just stories you carry. Ask whether each one helps you reach your goals. If not, "rip that story up" and write a new one.
- Priming: review the story every day and you start noticing opportunities that were always there. "Random" lucky breaks become statistically more likely.
Identity-based belief in 4 steps
Worked live on Raj's sleep, then combined into one sentence:
- Values: "I prioritize my health because it matters for my performance and my business."
- Data: "I know the data on sleep and health."
- What gets better: "I'd be smarter, better-looking, happier, ask better questions."
- The new habit, written as if already true: "I wind down early enough to get at least 6-7 hours a night." Fake it till you make it.
I'm the type of person who makes sure that I sleep at least 6 to 7 hours a night because I know what an edge it's going to give me in my business.MBA student example
Implementation intentions (Peter Gollwitzer)
A goal without a plan "is like a prayer." "I'll try to sleep earlier" gets an "Adorable. How?" Instead, write a when-then plan in movie-level detail:
When my alarm goes off every night at 11 p.m., I begin my designed routine. I start my wind-down music playlist, then I make my herbal tea...Dr Yousef's example
- Visualize it and write it down, then try it.
- Make it tiny. Brushing your teeth at 11 p.m. shuts the kitchen; then pajamas. Each step designs out a bad behavior.
- Make the "when" (the trigger) crystal clear. Most people skip this.
- For bad habits: "When I crave a cigarette or chocolate, then I will do X instead." Removing a behavior is much harder than adding one.
- The craving is really a feeling, usually overwhelm, stress, tiredness or low motivation. The behavior (scrolling, sugar, alcohol) is how the brain escapes it.
- The loop: overwhelmed by a deadline, you scroll for 45 minutes. The problem is still there, now with shame added, so you go around again. Each lap makes the pathway deeper, "like the roots of a tree."
- That's why "next time I won't" fails: the network runs automatically. "Raj is not driving this car."
- "Addiction just means habit." People are addicted to exercise and success too. Drop the moral weight from the word.
The fix: pause, then replace
- Cognitive pause. Before (or even while) doing it, ask: "What am I feeling right now? Why do I want this?" You're not forbidden; you just want to know why. Then go deeper: why are you exhausted?
- Tiny replacement behavior at the feeling. 60 seconds with your eyes closed. If you still want to scroll afterwards, go for it. You've created a new route and a chance to choose.
Scrolling is not a break (Nature, 2024)
- Compared
- No break, a walk or looking at nature, and scrolling.
- Finding
- Scrolling was about the same as no break at all. If you're exhausted, rest like an athlete: water, a snack, a stretch.
- What you're really training is emotional regulation. "If you can understand the emotion, you can control the behavior."
- After 1 month the old road gets thinner, after 3 months thinner still. Breaking a habit is harder than building one because you're pruning an old network and building a new one at the same time.
Phone proximity and brain power (UT Austin)
- Setup
- Phones fully powered off, then placed in another room, in a pocket or bag, or face down on the desk.
- Finding
- With the phone visible, attention span and general fluid intelligence dropped significantly. "That means you're dumber. Literally." The brain knows everything that's in there and keeps wanting to play.
- Have a phone "parking lot" out of sight when you need 100% of your brain: deep work, big decisions, team brainstorms. A phone in the room lowers the whole team's IQ.
- Social cost: people who hold their phone or put it on the table when meeting you seem less trustworthy, capable and intelligent, and it lowers the quality of the conversation.
- Raj hands his phone to his team, on airplane mode and out of the room, 30 minutes before each shoot.
- CEOs she observed would open a board deck, then get pulled away by Slack on a second monitor, their phone and an Apple Watch.
- The law: "The brain is literally a focusing machine. Every single time you switch your attention, you pay for it" in time and energy.
The test Raj took
- Write "I am a great multitasker" on one line, then 1-20 on another. Raj: 17.72 seconds.
- Same output, but alternate a letter and a number. Raj: 41.35 seconds, more than double, with many mistakes.
- You have one attention system: one 100%, not two. You can split it, but it's split. Notifications pull your eyes whether you choose or not.
- You can do two things if one is on autopilot (she calls her mom while driving a familiar route), but know you're not fully on either.
- What people call multitasking is really task switching, and that test was easy. Real work is harder, so turn notifications off, close email and put the phone away.
Self-described great multitaskers (Stanford)
- Finding
- Students who said they were good multitaskers were worse when tested. Constant switching leaves the brain "just foggy."
- Many people who think they have ADHD have attention spans worn down by scrolling and 24/7 email and WhatsApp.
- Ultra-successful people "just choose differently": they notice the cost and remove distractions.
DMN: Default Mode Network
The storyteller: daydreaming, boredom, mind wandering. When it's active, ideas float up.CEN: Central Executive Network
The CEO or project manager: goals, focus, and suppressing distractions (including ideas). You need it to get things done.- The two work against each other. Always busy or scrolling means your brain never gets a chance to hand you an idea.
- Schedule think time. Bill Gates decided the internet wasn't a fad during one of his Think Weeks. If it's not scheduled, busy people never do it.
- When to be bored: a little every morning and before bed. The afternoon slump also works, because lower inhibition lets wilder ideas through.
Shower thoughts, on purpose
- Load up on everything about the problem.
- Walk away when you're stuck.
- Add a new variable: water, a different room, a walk, a shower, cooking, exercise.
Avoid anything too immersive (a new movie) and never scroll, because it's all novelty, built by neuroscientists to hold your attention. A rerun you've seen 1,000 times is fine.
- Change your content diet. Algorithms feed you more of the same, so curate your feed ("bloom scrolling", Raj's term). Even then, put it away and give your mind space.
- Threat sells. Bad news and rage bait capture attention because the brain is wired for threat, so every outlet copies it. You can't change that biology, but you can cut yourself off.
- She puts some executives on a full news cleanse: "The world's going to go on whether you're looking at it or not." Many people have lost their inner voice, and that's where ideas come from.
Long-form
Story, highs and lows, characters. Builds creativity, autobiographical planning (planning your own future), empathy and memory.Short-form
Pure novelty, "junk food for the brain." No memory, which means no learning. Linked to more depression, anxiety and loneliness, whatever the content, because of the cuts.- Scene cuts in shows have exploded, and Netflix reportedly asks whether a show works as "second-screen viewing."
- Building anything needs long, boring stretches of focus. "If you want off days, go get a job."
Why scrolling makes you lonelier (her hypothesis)
Humans are pack animals: connection is a need like food or water. Long-haul truckers who go weeks without talking show brain atrophy. Social media isn't social anymore (mostly strangers), so it's like eating candy when you're hungry: hungrier afterwards.
| Chemical | Role |
|---|---|
| Dopamine | Motivation: drives you to seek connection. |
| Oxytocin | Bonding: what real connection delivers. Scrolling strangers gives none. |
| Serotonin | Contentment: the "box checked" feeling that never comes from scrolling. |
Choose a person (in person, then a call, then a text) over the phone. She admits she's struggled with scrolling and sugar too, so she relies on systems, not willpower.
Not anatomically exact, but it captures the networks that matter for performance.
- Story Studios (DMN): your story and meaning, the "why."
- City Hall (CEN): the CEO at the front of the brain. Sets the goal and quiets everything else.
- The Watchtower (Dorsal Attention Network): a spotlight that points wherever it's told. The question is who's telling it.
- The Alarm Tower (amygdala): emergencies override everything.
- Dispatch Center (salience network): "look over here." Every notification hijacks the Watchtower. You can't shut it off (it keeps you alive), so control your environment.
- Library and Archive (hippocampus): memory. It sits next to the amygdala, so emotional and scary things stick.
2017 Nobel Prize: circadian rhythms
- Takeaway
- Humans don't share one body clock. There are at least three genetic chronotypes with different energy peaks and ideal sleep times.
AM-shifted (about a quarter)
Wake early no matter what. Energy declines steadily through the day.Biphasic (the majority)
45-60 minutes to ramp up, a mid-morning peak, a hard afternoon dip, then a second wind if they take a real break.PM-shifted (about 10-15%)
Biologically late to bed and late to rise. Both Raj and Dr Yousef are PM-shifted.- Everyone gets roughly 2-3 peak hours a day. Protect them for your hardest work.
- She shifted her own natural 2-4 a.m. bedtime back about 3 hours using blackout curtains, an eye mask and routines.
- Her lab offers a free chronotype assessment (link in the episode description).
- Split sleep (4 hours, work, 4 hours) is hard on the brain and body. You need contiguous sleep, ideally starting before midnight (Matthew Walker).
A day for a PM-shifted person
| Window | Do | Why |
|---|---|---|
| Morning | Creative work: journal, brainstorm, read | Lower energy means lower inhibition, so the DMN produces more ideas |
| Midday dip | Admin, emails, calls and a workout | A workout in the dip makes the peak "peakier" |
| Evening peak | Focused, get-it-done work | The PM-shifted person's best window |
- AM-shifted CEOs should often not work out in the morning, because that's their peak brain time.
- Worried you'll be anxious if you don't work first thing? Schedule it: "one hour to brainstorm" is think time with discipline.
- Stress isn't the villain. Cortisol brings focus, alertness and motivation. With none at all, you'd be in a coma.
- A stress cycle goes up and comes down. Dozens of complete cycles a day are fine.
- Modern life never lets it come down: alarm, phone, emails, news, meetings, more emails. Eventually the adrenals "give out."
- Most people saying "burnout" are stressed, not clinically burned out, but chronic stress that never closes does harm your health.
Stress doesn't kill. Never completing the stress cycle kills.Dr Sahar Yousef
The 3M framework: micro, meso and macro breaks
10 minutes a day, 2 hours a week, half a day a month. Built and tested with peak performers.
A 9-week digital detox with about 450 UC Berkeley students
- Measured
- Attention span, complex working memory, loneliness, meaning, depression, anxiety and stress, before and after.
- Results
- Significantly less lonely, depressed and anxious. Attention span and working memory up significantly. The post-test fell during midterms, the most stressful time of term.
What the detox involved
- Limits on short-form and social media (long-form was fine), with a text sent to a friend if they went over. Typical drops: 2 hours to 30 minutes, or 6 hours to 2.
- Homework: watch a 90-minute movie with no second screen, which is genuinely hard for many of them now.
- A therapist taught emotional regulation, because scrolling is a coping mechanism.
- A curated content diet: unfollow accounts that don't teach or challenge you.
- Real connection (parties, hikes, even blind dates) and a new hobby all semester.
- Attention tests can't be gamed, and the surveys were anonymous.
- Her own limit: about 10 minutes of scrolling a day, plus 20-30 minutes of quality YouTube and long-form content. "Eat the mapo tofu first. Don't fill up on the candy."
- Her most powerless moment was addiction: smoking, drinking, scrolling and sugar, despite studying addiction. "Everybody's susceptible." Overcoming it made her feel "unstoppable."
- Her framework: much of reality is a construct of your mind, so protect what you let in and regularly audit what you're thinking.
- When she feels powerless, she daydreams being the most powerful person in the world. The brain "can barely tell the difference" between visualizing something and doing it.
- The cost: relentless focus meant giving up travel, leisure and social media, losing friendships and important relationships, and the addictions came from the same drive.
- No regrets: she has corrected course, now prioritizes the people closest to her and is "extremely community-oriented."