The Science of Humor & How to Become a Diligent Person — The Secrets of Laughter and Execution

Introduction

Humor and diligence. At first glance, these two seem unrelated. But both share a common thread: they become far more useful when you understand how the human brain works.

Why do we laugh? What are the scientific principles behind laughter? What systems do diligent people have? Is willpower alone enough?

In this post, Part 1 covers the scientific principles of humor and practical applications, while Part 2 addresses the psychology of diligence and concrete methods for building execution ability.

Part 1: The Science of Humor

1. Why We Laugh - Three Major Theories of Humor

Why do humans laugh? Psychology and philosophy offer three main theories.

Incongruity Theory

The most widely accepted theory. The gap between what we expect and what actually happens triggers laughter.

• The brain constantly predicts what comes next
• When predictions are wrong, tension builds
• When that tension is resolved in a harmless way, laughter erupts

For example, the joke "If time is money, shouldn't ATMs dispense time too?" takes the familiar metaphor "time = money" and extends it in an unexpected direction.

Superiority Theory

An ancient theory tracing back to Plato and Aristotle.

• Relative superiority felt when seeing others' mistakes or foolishness triggers laughter
• Laughing at someone tripping or at a foolish character in a skit falls into this category
• However, when suffering is serious, concern or empathy replaces laughter

The key is that it only works when safe distance is ensured.

Relief Theory

Proposed by Freud, laughter is the release of psychological tension.

• When taboo subjects (sex, death, politics) are addressed, internal tension builds
• Jokes serve as a safe outlet for that tension
• This mechanism explains why laughter sometimes erupts at funerals

The three theories are not mutually exclusive. Most humor involves a complex interplay of all three.

2. The Neuroscience of Humor - Prefrontal Cortex and Reward System

Understanding and appreciating humor is a complex process involving collaboration across multiple brain regions.

The Role of the Prefrontal Cortex

• Left inferior frontal gyrus: Interprets the meaning of verbal humor
• Right frontal lobe: Detects unexpected twists and judges "this is a joke"
• Dorsolateral prefrontal cortex: Processes logical contradictions and assesses "this is not dangerous"

Patients with right frontal lobe damage reportedly cannot understand joke punchlines.

Reward System and Neurotransmitters

When we appreciate humor, the brain's reward circuit activates.

Notably, oxytocin secretion increases when laughing together, making humor a social glue.

Physical Responses to Laughter

Laughter is a full-body workout.

1. The diaphragm contracts rapidly
2. Breathing patterns change, increasing oxygen supply
3. More than 15 facial muscles activate simultaneously
4. Heart rate temporarily increases then drops below normal
5. Cortisol (stress hormone) levels decrease

Research suggests 15 minutes of daily laughter burns about 40 calories.

3. Types of Humor - Four Styles

Psychologist Rod Martin classified humor into four styles.

Affiliative Humor

• Humor to strengthen relationships with others
• Sharing funny stories, making others laugh
• Enhances social bonds and creates positive atmosphere
• Example: "Our team meetings always run late because everyone has so much they want to say"

Self-Enhancing Humor

• Finding humor in difficult situations to protect yourself
• Reframes stressful situations to boost psychological resilience
• Closely related to an optimistic worldview
• Example: After dropping papers: "I'm a born performer. Look at this paper rain!"

Aggressive Humor

• Sarcasm, mockery, and teasing that puts others down
• Generates short-term laughter but damages relationships
• Sometimes used to reinforce power structures or control others
• Caution: When leaders use this type, team psychological safety drops significantly

Self-Defeating Humor

• Putting yourself down to win others' favor
• Used appropriately, it creates a humble, approachable impression
• Overuse risks self-esteem damage and depression
• Key: Recognize the boundary between "making fun of myself" and "diminishing myself"

The key to healthy humor is increasing the proportion of affiliative and self-enhancing humor.

4. Developing a Sense of Humor - A Trainable Skill

A sense of humor is not innate -- it is a trainable cognitive ability.

Pattern Recognition Training

The core of humor is recognizing and twisting patterns.

• Observation journal: Record 3 "strange things" daily. Example: "Five laptops at the cafe had the same sticker"
• Reversal practice: Reverse everyday sentences. "The early bird catches the worm" becomes "The early worm gets caught by the bird"
• Finding similarities: Find common ground between completely different concepts. "Meetings and dentist visits have this in common: relief when they're over"

Associative Thinking Enhancement

Humor comes from the ability to connect distant concepts.

1. Random word combinations: Pick two random words from a dictionary and create a story
2. Extended metaphors: Push "Life is like OO" to its logical extreme
3. Category crossover: Ask questions like "What if a chef were a programmer?"

Timing Practice

In comedy, timing is as important as content.

• The art of the pause: Create 0.5-1 seconds of silence before the punchline
• Speed variation: Deliver the setup quickly, the twist slowly
• Rule of Three: Set up a pattern with the first two, break it with the third

5. Witty Conversation - Practical Techniques

Humor techniques you can apply immediately in everyday conversation.

Callback

Referring back to something mentioned earlier in the conversation.

• Remember a funny episode from earlier in the conversation
• Bring it up again in a completely different context
• Gives the listener the pleasure of connection: "Oh, that thing from earlier!"
• Especially effective in podcasts, presentations, and meetings

Rule Breaking

Intentionally breaking expectations after setting them up.

• Suddenly using casual expressions in a formal setting
• Inserting a random item in the middle of a serious list
• Example: "The three keys to success: passion, perseverance, and good WiFi"

Misdirection

Guiding the listener's expectation in one direction then switching to another.

• The setup makes the audience anticipate a specific conclusion
• The punchline goes in a completely different direction
• Example: "I'm always very organized. This morning I overslept right on schedule"

Exaggeration

Amplifying reality to an extreme to provoke laughter.

• Expand everyday experiences to cosmic scale
• Make numbers absurdly large
• Example: "The Monday morning alarm is the cruelest sound in human history"
• Caution: Too much exaggeration sounds like lying rather than humor

6. The Effects of Humor - Changes That Laughter Brings

Humor is not mere entertainment -- it produces tangible effects across various domains.

Stress Relief

• Reduces cortisol levels by an average of 39%
• Increases secretion of immunoglobulin A
• Lowers pain perception in chronic pain patients
• Humor therapy programs showed effects comparable to medication in anxiety disorder patients

Relationship Building

• Using humor in first meetings increases likability by 27%
• In couples research, frequency of laughing together was the strongest predictor of relationship satisfaction
• Appropriate humor use in teams increases psychological safety

Creativity Enhancement

• Divergent thinking ability improves by 20% after exposure to humor
• Remote Associates Test (RAT) scores improve in a "light mood" state
• Watching comedy clips before brainstorming increases the number of ideas generated

Leadership

• Employee satisfaction is 23% higher for leaders who use humor appropriately
• Including humor in presentations increases information retention by 1.5x
• However, leaders who use aggressive humor see trust plummet

Part 2: How to Become a Diligent Person

7. Self-Discipline vs. Motivation - The Truth About Willpower

Everyone says "I want to be more diligent." But why is execution so difficult?

Ego Depletion Model

According to Roy Baumeister's research, willpower works like a muscle.

• It depletes with use
• It recovers with rest
• It strengthens with repeated use

However, recent replication studies have raised doubts. Only people who believe willpower depletes actually experience depletion.

Motivation vs. Discipline

Key insight: Start with motivation, maintain with discipline.

Habit Automation

The ultimate goal of self-discipline is to not use willpower at all.

1. Cue: Set a signal that triggers the behavior
2. Routine: Specify the action to perform
3. Reward: Provide immediate reward after completion

For example, create a loop: "When the 7 AM alarm rings (cue), I stretch for 10 minutes (routine) and drink my favorite coffee (reward)."

8. The Psychology of Execution - Implementation Intentions

Peter Gollwitzer's Implementation Intention research reveals the core of execution.

The "If X, then Y" Formula

"If I arrive home after work, I change into workout clothes" is far more effective than simply "I should exercise."

Research evidence:

• College vaccination experiment: Groups that pre-determined location and time had more than double the vaccination rate
• Exercise habit study: Groups with implementation intentions maintained exercise at 91% after 8 weeks, versus 31% for controls

Three Steps to Design Implementation Intentions

Step 1: Predict obstacles

• "What situations will interfere?"
• "What patterns existed when I failed in the past?"

Step 2: Create contingency plans

• "If I'm tired, I'll do just 10 minutes"
• "If it rains, I'll switch to indoor exercise"
• "If I work late, I'll move it to the next morning"

Step 3: Visualize

• Mentally picture the specific action scene
• Imagine the place, time, clothing, first movement
• The brain does not fully distinguish imagination from reality

9. Becoming a Morning Person - The Science of Sleep and Rhythm

Sleep Hygiene

The foundation of diligence is quality sleep.

• Consistent sleep/wake times: Keep variation within 30 minutes, including weekends
• Blue light blocking: Limit electronic device use starting 2 hours before bed
• Caffeine boundary: No caffeine after 2 PM
• Bedroom environment: 18-20 degrees Celsius, complete darkness, appropriate noise blocking
• Bed purpose restriction: Use the bed only for sleep-related activities

Cortisol Awakening Response

• Cortisol increases sharply within 30-45 minutes after waking
• Strong light exposure during this window stabilizes circadian rhythm
• 10 minutes of natural sunlight after waking normalizes cortisol rhythm
• Once this rhythm stabilizes, waking up refreshed becomes natural

The 90-Minute Sleep Cycle Rule

Sleep repeats in approximately 90-minute cycles.

• NREM Stage 1 (falling asleep): 5-10 minutes
• NREM Stage 2 (light sleep): 10-25 minutes
• NREM Stage 3 (deep sleep): 20-40 minutes
• REM sleep (dream sleep): 10-20 minutes

Timing your wake-up to the end of a sleep cycle helps you wake up refreshed. 6 hours (4 cycles) or 7 hours 30 minutes (5 cycles) are typical.

10. The Power of Small Wins - The Progress Principle

The Progress Principle

According to Teresa Amabile's research, the most powerful driver of intrinsic motivation at work is progress on meaningful work.

• It is small progress, not big achievements, that matters
• The feeling of moving forward a little each day sustains motivation
• When progress goes unrecognized, motivation drops sharply

Small Goal Setting Strategy

The 2-Minute Rule: Reduce new habits to under 2 minutes.

• Instead of "read for 30 minutes daily," try "read 1 page daily"
• Instead of "exercise daily," try "just put on workout clothes"
• Instead of "write a journal," try "write just one sentence"

Minimizing the friction of starting makes persistence possible.

Building Momentum

When small wins accumulate, momentum forms.

1. Record 1 small win per day
2. Confirm 7 wins in a weekly review
3. Analyze patterns in a monthly review
4. Adjust the big picture in a quarterly review

Chain Effect: Like Jerry Seinfeld's "Don't Break the Chain" technique, recording consecutive days creates a powerful reluctance to break the streak.

11. Environment Design - Choice Architecture

Choice Architecture

An environment design strategy based on Richard Thaler's Nudge theory.

Core principle: Make good behaviors easy, bad behaviors hard.

Temptation Removal Strategies

• Smartphone: Put social media apps in a folder on the 2nd page or further
• Snacks: Place healthy food at eye level, snacks on high shelves
• TV: Remove remote batteries; require putting them back each time
• Notifications: Turn off all unnecessary push notifications

Changing Defaults

The power of defaults is overwhelming.

• 401(k) auto-enrollment rates: 86% when default is "enrolled," 49% when "not enrolled"
• Organ donation consent rates: Over 90% in opt-out countries, under 15% in opt-in countries

Applying to daily life:

• Pre-determine the sequence of tasks to do after waking
• Lay out workout clothes the night before
• Set your computer's start page to a work tool
• Set the default meeting length to 25 minutes instead of 60

Environment Design Checklist

Check the following:

1. Are there distractions in your workspace?
2. Are needed tools within arm's reach?
3. How many steps are needed to start your most important task?
4. Are potential temptations visible?
5. Are water and healthy snacks nearby?

12. Accountability Systems - Building External Structure

When internal motivation is not enough, external structure helps.

Public Commitment

• Declare your goals to family, friends, and colleagues
• Record progress on social media
• Public commitments create psychological costs that make quitting harder
• However, declaring goals without specific action plans can actually backfire

Progress Tracking

What is not tracked cannot be managed.

• Daily tracking: Checklist of core actions performed today
• Weekly review: Pattern analysis of the past 7 days and next week adjustments
• Monthly reflection: Direction check from the big picture

The simpler the tool, the better. A single sheet of paper often beats a complex app.

Accountability Partnership

• Mutual reporting: Share progress daily or weekly
• Companion effect: Simply being together increases execution rate by 65%
• Role switching: Alternate between "monitor" and "executor" roles
• Core rule: Approach with support and questions, not criticism

13. Overcoming Perfectionism - The Greatest Enemy of Execution

Why Perfectionism Kills Diligence

Perfectionism looks like high standards on the surface, but in reality it is the greatest enemy of starting and finishing.

• Start delay: "I'll start when conditions are perfect" means never starting
• Mid-process abandonment: A small mistake negates everything and leads to giving up
• Completion delay: "Just a little more polishing..." repeats infinitely
• Comparison trap: Comparing others' finished products with your rough draft

The 70% Rule

Instead of pursuing perfection, aim for 70% completion.

• At 70%, start
• At 70%, release
• At 70%, share

As Reid Hoffman famously said, if you are not embarrassed by the first version, you launched too late.

"Done Is Better Than Perfect" in Practice

Time-limiting technique: Physically block perfectionism.

• Report: Set a 2-hour timer; submit when time is up
• Email: Write and send within 5 minutes
• Plan: Complete a draft within 30 minutes and get feedback

Iteration mindset: It does not need to be perfect in one go.

1. First draft (fast, quantity over quality)
2. First revision (organize structure)
3. Second revision (refine details)
4. Release (collect feedback)
5. Improve (data-driven)

Comprehensive Practice Guide

Combining the science of humor and the psychology of diligence, here is a practice guide.

7 Things You Can Apply Today

1. Set a morning routine: Define 3 automatic actions after waking
2. Apply the 2-minute rule: Start new habits at under 2 minutes
3. Humor journal: Record one funny observation per day
4. Write implementation intentions: Create 3 plans in "If X, then Y" format
5. Redesign your environment: Remove 1 distraction, add 1 facilitator
6. Record small wins: Write down 1 win each evening
7. Apply the 70% rule: Complete even if it is not perfect

Weekly Check Questions

• When did you laugh the most this week?
• Which implementation intentions worked well and which need adjustment?
• Is there anything else in your environment you can change?
• Did you delay anything due to perfectionism?

Closing

Humor and diligence are both abilities that can be understood scientifically and trained systematically.

Understanding humor helps manage stress, strengthen relationships, and boost creativity. Understanding the psychology of diligence secures execution ability through systems and environment rather than relying on willpower alone.

The most important thing is starting. An imperfect action beats a perfect plan. And don't lose your laughter along the way.

Living diligently with laughter. That is the most sustainable way of life.

References

• Martin, R. A. (2007). The Psychology of Humor: An Integrative Approach
• Baumeister, R. F. & Tierney, J. (2011). Willpower: Rediscovering the Greatest Human Strength
• Amabile, T. & Kramer, S. (2011). The Progress Principle
• Gollwitzer, P. M. (1999). Implementation Intentions: Strong Effects of Simple Plans
• Thaler, R. H. & Sunstein, C. R. (2008). Nudge: Improving Decisions About Health, Wealth, and Happiness
• McGraw, P. & Warner, J. (2014). The Humor Code
• Clear, J. (2018). Atomic Habits
• Walker, M. (2017). Why We Sleep