Gemma Spake — Why does time start flying in our 20s?

In one sentence

Time perception is not a steady clock; it is a psychological construct built on novelty, emotional intensity, and the distinctness of memories.

Why read this (and who it's for)

This episode addresses the existential anxiety of "time flying" during the transition into adulthood. It is for anyone in their 20s who feels like months are dissolving into weeks and wants to understand the neurological and psychological reasons why. You will learn how to "stretch" your perception of time by intentionally engineering novelty and breaking the "cognitive inertia" of digital consumption.

The big idea

Gemma Spake argues that our perception of time is fundamentally different from "measured time" (the social construct of minutes and hours). While measured time is a convenient social tool, perceived time is a neurological experience rooted in how our brains process information.

The core reason time seems to speed up as we age—particularly in our 20s—is a reduction in novelty. When we are young, every experience is a "first": the first time riding a bike, a new school, or a new food. These novelties create "snapshots" in our memory. As we enter our 20s, life becomes more structured and routine (full-time jobs, established routines). Because our brains recognize these moments as "same-same," they fail to create distinct memory anchors, making the months feel like a singular, blurred event.

Key ideas

The Three Faces of Time

• What it is: Time exists in three layers: Measured (the clock), Social (cultural constructs like "lunchtime"), and Perceived (the internal psychological experience).
• Why it matters: Understanding that "time" is a subjective experience allows you to realize that you can influence how much "life" you feel you've lived by changing your internal experience, regardless of the clock.
• In the book: Spake notes that while we use 60-minute hours because they are easily divisible, these are social constructs. Your actual experience of time varies based on your personality, temperament, and what you are doing in the moment.

The Novelty Principle

• What it is: The more "new" things you experience, the more your brain perceives time as being "larger."
• Why it matters: Novelty creates distinct snapshots. When you do something new, your brain processes more information, making that period of time feel more expansive in hindsight.
• In the book: Spake cites the "oddball experiment," where people perceived a novel image as lasting longer than a familiar one, and a 2007 study showing that exciting, colorful stimuli were perceived as lasting longer than boring ones.

The Memory Paradox of Time

• What it is: Time is not measured by a clock, but by what you remember. If a period of time lacks distinct, memorable moments, your brain "collapses" that time into a single, short event.
• Why it matters: If your life feels like it's flying by, it's because you aren't making enough "memorable" deposits. To slow time down, you must create memories that stick.
• In the book: Spake explains that emotionally intense periods (falling in love, grieving, a gap year) feel longer because they have "emotional diversity" and intensity that forces the brain to consolidate those memories.

The Digital Experience of Time

• What it is: A fourth type of time created by digital technology, where our perception of time increases (we lose track of it) while our ability to evaluate how much time we've spent decreases.
• Why it matters: Digital media creates "cognitive inertia," where the friction of switching from a screen to a real-world task is so high that we lose chunks of our day to the "infinite scroll."
• In the book: Spake highlights a 2023 study of students who felt they lost the notion of time during digital use, often "blinking" and realizing 20 minutes had passed.

Proactive Interference and Digital Compression

• What it is: Short-form content (like TikTok) creates "proactive interference," where the overwhelming stimulation of one video prevents the brain from consolidating the memory of what happened before or after it.
• Why it matters: This is why scrolling feels like "nothing" in retrospect. It erases the surrounding time because your brain is too over-stimulated to "save" the memory of the real-world moments surrounding the screen time.
• In the book: Spake explains that because the "span of a novel event" is squeezed into seconds, the brain cannot decide what is worth remembering, leading to a "time compression" effect.

Frameworks & tools

The Three-Step Intervention for Time Recovery

If you feel like your life is moving too fast, use this framework to reclaim your perception of time:

1. Acknowledge Internal Dissonance: Notice the unhappiness you feel about your screen time and the fact that you continue to do it anyway. Admit, "I want to add time back into my life, but I can't [right now]."
2. Test the Alternative Reality: Actively trial periods where you are "off-grid." Leave your phone at home while meeting friends. Your brain needs physical evidence that a life without constant digital stimulation is not a threat.
3. Slow Implementation: Do not try to change everything at once. Pick one strategy (an app blocker, a time limit, or deleting an app) and stick to it until it becomes a habit.

The Novelty Micro-Dosing Method

To stretch your perception of time without needing to travel the world, incorporate "micro-doses" of novelty:

1. Route Variation: Take a different way to work/school, even if it takes 5 minutes longer.
2. Flavor Rotation: Switch up your coffee brand or flavor every month.
3. Dining Variety: Avoid eating at the same restaurant twice.
4. Collective Novelty: Seek out "behavioral contagion" by surrounding yourself with people who have a natural inclination to do new things (art classes, trips, etc.).

Memorable examples & stories

• The "Oddball" Experiment: A classic psychological protocol where people perceive a novel image as lasting longer than a repeated one, proving that novelty "stretches" our perception of time.
• The "One Second a Day" Diary: Spake shares her personal experience of recording one second of her day for five years. Looking back, she realized how much she had actually lived, and how documenting it grounded her in the past.
• The "Screen Password" Hack: A friend of Spake's who has her friends set her screen time password. Because she doesn't know the password, she is physically locked out of her own addiction, preventing her from breaking promises to herself.
• The Pandemic "Frozen" State: The observation that for those aged 17–25, a massive chunk of "impressionable" years were spent in a "frozen" state of indoor scrolling, creating a lack of distinct memories for that period.

Key quotes

• "Time isn't measured by a clock. It is measured by what you remember and what is consolidated and what is not and what your emotional state was at the time."
• "Novelty speeds up time [in the moment], but in hindsight, it actually slows it down. It makes it seem like you have more of it."
• "The day you're having right now was somebody's last day on earth... Gratitude is the antidote." (Paraphrased)
• "When you're on your phone, that's one big, almost nothing event because there wasn't enough distinctness for your brain to devote a whole memory to it."

How to apply it

This week

• Identify one "Same-Same" routine: Pick one thing you do every day (like your commute or your lunch) and intentionally change one small variable (a different route, a different food).
• The "Blink" Test: Next time you find yourself scrolling on your phone, stop and notice how much time has passed. Acknowledge the "cognitive inertia" that kept you there.
• Document one thing: Take one photo or write one sentence in a journal about something that happened today that felt "novel" or "significant."

Ongoing

• Practice Behavioral Contagion: Identify one friend who is a "doer." Reach out to them this week to plan a specific outing that involves a new experience.
• The "Offline" Rule: Choose one social activity per week where the phone is intentionally left in the car or at home.
• Active Documentation: Maintain a "junk scrapbook" or a daily photo album. The goal is to create a "documentary" of your life that you can look back on to see the full weight of your experiences.

Common pitfalls

• The Novelty Trap: People think they need to do "big" things (like traveling to Paris) to slow down time. Spake clarifies that "micro-doses" of novelty (different coffee, different routes) are just as effective for memory consolidation.
• The Willpower Fallacy: Expecting to "just stop" using your phone. Spake warns that apps are designed by neuroscientists to bypass your willpower; you need systems (like the friend-held password) rather than just "trying harder."
• The Social Cost: People often avoid changing their digital habits because they fear the social cost of being "disconnected." Spake acknowledges this is a real barrier but argues the benefit of reclaiming your time is worth the initial discomfort.

Connects to

• The "Average of Five" Principle: The idea that you are the average of the people you spend the most time with (Behavioral Contagion).
• Cognitive Inertia: The psychological concept of staying in a state of rest/fixation because it is comfortable, even if it isn't productive.

If you remember only three things

• Time is measured by memory, not by the clock.
• Novelty is the primary lever for stretching your perception of time.
• Digital media creates "time compression" by overwhelming your brain's ability to consolidate memories.

Internalize it

• Reflection questions

  • When was the last time I did something for the first time?
  • If I looked back at my last month of life, what "snapshots" would I see? If the answer is "nothing," how can I create a snapshot today?
  • In what ways is my phone creating "cognitive inertia" in my daily routine?
  • Who are the people in my life who naturally seek out novelty, and how can I spend more time with them?

• Flashcards Q: What is the "Memory Paradox of Time"? A: The idea that time is measured by what we remember and what is consolidated, rather than by a clock. Q: How does novelty affect our perception of time? A: Novelty makes time feel "larger" in hindsight because it creates distinct, memorable snapshots. Q: What is "Cognitive Inertia"? A: A state where an organism (or person) becomes fixated on a behavior (like scrolling) and finds it difficult to change because of the comfort and structure of that state. Q: Why does short-form content (TikTok) cause time to "fly"? A: It creates "proactive interference" where the high stimulation of the screen prevents the brain from consolidating memories of what happened before or after the scrolling session. Q: What is the "Digital Experience of Time"? A: A fourth type of time where our perception of time increases (we lose track of it) while our ability to evaluate how much time we spend doing things decreases.

Fidelity note

Confidence is high. This summary covers all major points of the transcript, including the three types of time, the impact of the pandemic/social media, the role of novelty, and the specific actionable advice provided by the speaker. The "Four types of time" (Measured, Social, Perceived, Digital) is a specific framework introduced by the speaker as a modern addition to the traditional three.