Gianna’s Gem: The Peal-End Rule to Drive Emotional Response at Your Events

Hi there,

Last week I attended a charity luncheon for PARCA, a beautiful organization serving individuals with developmental disabilities, at a gorgeous Cape Cod-themed event in Hillsborough for ~400 elegant women. The tables were adorned with coastal nantucket charm, the fashion show was delightful, the women were dressed to the nines in their best Cape Cod coastal attire, and I genuinely enjoyed the opportunity to learn more about the organization and the interesting people I met there.

But here's the truth: none of that is what I remember most, or what I thought was the most compelling part of the event.

What I remember — what I will always remember — is a young woman who walked onto the stage with her mother. She was an adult now, but had benefitted from PARCA's programs as a child. She stood up there, in front of 400 strangers, (admitting she was nervous) and told us who she had become. Confident. Successful. Holding down not one, but two jobs. Full of confidence, vitality, and self-belief. And she described how PARCA had helped make her that way. Her mother stood beside her, beaming, and even shedding some tears of emotion.

As a mom, I nearly cried myself. I mean I was blinking hard, doing the thing where you look at the ceiling so you don't end up with runny mascara among strangers.

In that moment, every donation I had made to PARCA at the event stopped being a transaction and became something real. Something human and meaningful. Something that mattered in the way that most things at events simply don't. That single moment made me feel the impact of charitable giving more viscerally than any impact report, any statistics slide, any polished video package, silent auction, or fashion show ever has.

It was the peak of the entire event. And it was the last thing I thought about on the drive home.

That's not an accident. That's psychology.

Gianna's Gem: Your attendees will not remember everything that happened at your event. They will remember how they felt at its most intense moment — and how it ended. Design for those two things above all else.

The Peak-End Rule: The Science Behind the Feeling

As a psychology major, I love digging into the principles behind human emotion. And turns out, there’s a psychological principle, developed by Nobel Prize-winning behavioral economist Daniel Kahneman, called the Peak-End Rule. The finding, which has been replicated in research across medicine, entertainment, and consumer experience, is this: when people reflect on an experience, they don't average out all of the moments and rate them holistically. Instead, their memory and overall judgment of the experience is shaped almost entirely by two things:

1. The Peak: the single most emotionally intense moment, positive or negative.

2. The End: how the experience concluded.

Everything in between? It largely fades. The duration and details of the experience matters far less than most planners assume.

I first encountered this framework intellectually. I've been living it professionally for over 23 years. And I felt it deeply at the charity gala last week in a room full of women wearing espadrilles and nautical gowns.

The PARCA luncheon was a wonderful event by any measure. The theme was fun. The auctioneer was entertaining. The community of women in that room was warm and impressive. But the moment that will last  was the young woman on that stage with her mom. That was the peak. And because it happened near the middle of the program, it also inspired me to want to donate more, buy an extra raffle ticket, and share about the organization with more people afterwards. It was designed, whether intentionally or not, in perfect alignment with the science.

Why This Changes How You Should Think About Every Event You Plan

Most event planners spend the majority of their time and budget on the beginning; the food, the décor, the welcome, the production quality, the branded swag. And while those things matter for creating a professional baseline (you absolutely need a solid foundation), the research is clear: they are not what your attendees will remember. They are not what will move them. They are not what will make them donate, purchase, evangelize, or return.

What creates memory is emotion. And emotion comes from peaks.

A recent piece in PCMA's Convene magazine illustrated this powerfully. At the American Occupational Therapy Association's (AOTA) Annual Conference & Expo, Army veteran and bestselling author J.R. Martinez delivered an opening keynote about how occupational therapy had transformed his recovery from severe burn wounds sustained in Iraq. It was moving on its own. But AOTA went further: they quietly tracked down Kim, the actual occupational therapist who had treated Martinez during his recovery, secretly flew her to Anaheim, and surprised him on stage during a standing ovation. The audience, according to those in the room, went completely wild as Martinez, visibly overcome with emotion, couldn't stop hugging her.

As AOTA's director of meetings and events Leslie Jones noted, creating that reunion was rooted in building a true sense of community and connection — and it created an experience that will stay with attendees for years.

That is the Peak-End Rule in action. That is intentional design.

Gianna's Gem: The Peak-End Rule is not a trick. It's a framework for understanding what your attendees will actually carry with them when they leave your event. 

Always design backwards from the feeling you want them to have at the end.

The Two Questions Every Event Planner Should Be Asking

Before you finalize any event program, I want you to consider these two questions  not for five seconds, but genuinely:

1. What is the single most emotionally powerful moment in this event?

Not the most expensive. Not the most logistically complex. The most emotionally resonant. If you can't immediately name it, you don't have one yet — and you need one.

For PARCA, it was the young woman with her mother (p.s. This is 100% free but 100% emotionally charged). For AOTA, it was a veteran being reunited with the person who helped save him. These moments don't require the largest budgets. They require the deepest understanding of your audience's values, and the courage to put a real human story at the center of your program instead of a polished presentation.

2. How does this event end?

The closing moments of an event carry enormous psychological weight. They are what your attendees bring home, what they tell their friends about, what they post about, what they dream about (or don't). And yet — as anyone who has planned a large conference knows — the last session is chronically underfunded and underthought. Attendance drops. Energy dips. And the event fizzles rather than ends with a memorable bang. Your event ending should feel more like the finale of a fireworks show and less like a decrescendo (to use a musical term).

The PCMA article makes a point worth underlining: annual conferences almost universally have a last-day attendance problem. If your closing is forgettable, your event will be forgettable, regardless of how extraordinary the middle was. Your final moment is your final impression. It needs to earn its place.

Micro Peaks: You Don't Always Need the Grand Gesture

Here's what I want you to take away if the AOTA-level production feel daunting: a peak doesn't have to be a surprise reunion. It doesn't have to be a celebrity. It doesn't have to be expensive.

The PCMA article also highlights what it calls "micro EQ moments" which can be five to ten minute emotional experiences woven into a program that can create just as powerful a response as a keynote. An artist or CEO who shares a lived experience. A customer that reframes why your work matters. I attended a luncheon today and as a new member of the Symphony Junior Committee, I had to stand up and state a fun fact about myself (I joked about when I got my sommelier certification and then moonlit as The Decantress, meeting with wine distributors in the parking garage at Google between meetings to accept wine sample deliveries) and people came up to me afterwards asking questions about wine and connecting with me about that fun era in my life. I similarly remembered the human moments of the gala, like when one of the chairs shared she was so nervous when she first stood before the group that she accidentally mentioned she had two daughters rather than a son and a daughter. Human, and relatable and hilarious. We need more shared human moments to connect us - less polish, more authenticity.

What makes a peak is not the production value. What makes a peak is authenticity. The PARCA moment moved me because it was undeniably real. No script could have manufactured what that woman communicated standing next to her mother. No branded centerpiece, no themed cocktail, no choreographed entertainment could have reached me the way she did.

Your audience is sophisticated. They can feel the difference between something designed to look emotional and something that is emotional. The former lands with a quiet thud. The latter doesn't let go.

Gianna's Gem: Authenticity is the most powerful production value you have. A real story, told by the right person, at the right moment, will outlast every floral installation and celebrity appearance you have ever booked.

How to Design for the Peak-End Rule: A Practical Framework

When you sit down to build your next event program, here's how to apply this:

Map your emotional arc before you map your agenda. 

Start by asking: what do I want my audience to feel when this is over? Work backwards from that feeling, and then build your program around creating the conditions for it. The content, the speakers, the format — all of it should serve that arc.

Protect your peak. Once you've identified the most emotionally resonant moment in your program, build a wall around it. Don't schedule it for 2pm on Day 2 when energy is at its lowest. Don't bury it in a packed agenda where the audience is already cognitively depleted. Give it space. Let it breathe. Set it up, and then trust it to land.

Invest in your ending. Whatever you cut from your budget, don't cut the close. Whether it's a surprise reunion, a live performance, a final story, or a ritual that ties the entire experience together. Your ending carries more psychological weight than almost anything else in your program. Invest in it accordingly and share a teaser with people about why they may want to stick around for it (I can share ideas here as well - just message me for a call).

Find the human story. For nonprofit events, in particular, this is your greatest untapped resource. Your beneficiaries. Your volunteers. The people whose lives have been changed by the work. These are your peak moments waiting to be told. Give them the stage. Get out of the way. Let them be real.

The Cape Cod table settings were charming. The women I met were wonderful.. But the young woman from PARCA who stood on that stage with her mom? She is the reason I'll be back next year. She is the reason I reached for my checkbook. She is the reason I'm writing to you about this today.

That's the power of a peak.

Design for the feeling. The rest is just logistics.

You've got this.

XX,

Gianna

Learn more about PARCA and the life-changing work they do for individuals with developmental disabilities at parca.org.

For more on the Peak-End Rule applied to event design, read the full PCMA Convene piece "What 'All the Feels' Means for Meetings".

Gianna Gaudini is an event strategist, advisor, and author of the Amazon bestselling book The Art of Event Planning. She's held leadership roles at Google, AWS, SoftBank Vision Fund, and Airtable, creating unforgettable experiences that drive business results. For more insights on creating exceptional events and experiences, visit GiannaGaudini.com or connect with her on LinkedIn.