I Tested My Content On Meta's New TRIBE Brain Model. Here's What I Found.

Waddup y'all! Just got back from Florida with the family, which is why you didn't get a newsletter from me last week.

Real talk for a second. Ever since I started making content, I've been a huge proponent of taking time off and truly disconnecting. But since starting Social Playbook, actually taking PTO has been damn near impossible. Client work comes first, and everything else (this newsletter included) has to fall to the wayside when I'm out. I'm not complaining, I love what I do, but it's a real thing.

Taking time to recharge matters though, especially as entrepreneurs and founders. Your life is so busy with work that you HAVE to step away or you'll burn out. Outside of the client work I couldn't fully unplug from, I got to spend real time with my wife and kids on the beach, in the sun, working from a balcony with the ocean as my background. Was exactly what I needed.

Anyway. This newsletter is one of my favorites to write. Let's get into it.

I'm going to nerd out on you for a minute, but stay with me because this is going to matter for your brand sooner than you think.

A few weeks ago, Meta's research arm (FAIR) released something called TRIBE v2. The short version: it's an AI model that predicts how the human brain responds to video, audio, and language. It was trained on over 1,000 hours of fMRI scans across 720+ people. They open-sourced it, dropped a demo, and most marketers completely missed it.

I couldn’t miss it. I went deep.

I bought an external hard drive off Amazon just to run it (this thing eats over half my computer's memory, no joke). And I've spent hours messing with the demo and feeding it my own content.

What I found is the reason I'm writing this email.

I ran my viral content through it first. Every single one of my viral videos lit up the same exact regions of the brain at the same exact moments. Visual processing, auditory pattern recognition, the parts that handle humor and surprise. Same fingerprint, every time.

(By the way, I had to research the parts of the brain, what they do, how they function, etc. All just to understand this model.)

That alone was wild. But then I ran my longer form videos through it.

That's where it got interesting.

I could see exactly where in the video the brain shifted from passive consumption into deeper cognitive load. Where viewers had to start "thinking" instead of just absorbing. And here's the kicker: I pulled up the Instagram retention curve for those same videos and mapped them side by side.

The drop-off in retention matched the brain shift almost to the exact second.

Let that sit for a moment. A research model predicted, based on neural activity alone, the precise moment my audience would mentally check out. And the platform analytics confirmed it.

This is not a future thing. This is right now. I tested it on my own content this week.

Meta does not invest hundreds of researcher-hours and 1,000+ hours of fMRI data into something that doesn't eventually shape their products.

Their entire business is attention. Every ad, every reel, every algorithm decision is built around one question: what holds people's focus? Until now, the best they had was behavioral data. Clicks, watch time, scroll depth. All of it is downstream of the actual thing they want to measure: brain engagement.

TRIBE v2 is them moving upstream.

I'm not saying tomorrow your ad account is going to have a "brain engagement score." But I'd bet a lot that within the next few years, the principles coming out of this research start showing up in how Meta evaluates creative, what gets distribution, and what the algorithm rewards.

Creative has already been getting more scientific. Hook tests, first-three-second optimization, retention curves, all of it. This is the next level. And it's a level no one has played at before.

Here's how I see this playing out.

The brands already winning will stabilize. They're going to keep winning because their creative instincts are already aligned with how attention actually works.

The brands winning through content will innovate. They'll start thinking about creative the way a neuroscientist would. Not "is this funny" but "what is this video doing to the viewer's brain at second 7, second 14, second 22?" Their wins are going to compound massively.

The brands doing nothing will lose. Slowly at first, then all at once. Because when the algorithm starts factoring in something like predicted neural engagement, content that doesn't account for it just won't get distribution.

I'm not being dramatic. This is the same pattern we saw with iOS 14, with the shift to short-form, with the rise of UGC. Every time the platform changes how it measures things, there's a window where the people who saw it coming pull ahead and the people who didn't spend the next two years catching up.

Nothing.

Seriously. There's no tool to buy, no campaign to launch, no agency pitch attached to this email.

What you SHOULD do is start preparing your thinking:

Get familiar with the research. Even reading Meta's blog post on TRIBE v2 will put you ahead of 99% of founders. You don't need to understand fMRI scans. You need to understand that creative is about to be measurable at a level we've never had access to.

Hire people who think this way. When you bring on your next content lead, your next creative strategist, your next paid social hire, ask them how they think about attention and engagement. The answers you want to hear are about cognitive load, pattern interruption, and viewer state. The answers that should worry you are "I just make stuff that feels good."

Start asking better questions about your own content. Stop asking "did this perform?" Start asking "WHY did this perform?" If you can't answer that with specifics, you're going to get left behind when the bar moves.

I love this stuff. I'm a content nerd. The fact that I can now look at a piece of content and know, with research-backed accuracy, where my audience's brain stops engaging is exciting to me.

It's also a reminder of why this work isn't going away. AI is not going to replace the strategists who understand humans. It's going to make them more powerful. The people who treat content like a craft AND a science are going to win the next decade.

I showed the demo to a friend running a health company this week as inspiration for how he should think about positioning. His brain (no pun intended) lit up the same way mine did the first time I saw it. This isn't science fiction anymore. It's a tab open on my computer.

You don't have to do anything with TRIBE v2 today. But if you're a founder building a brand on content, you need to know it exists, and you need to know your competitors who are paying attention are about to start thinking very differently than you are.

Reply and tell me. What's your gut reaction reading this? Are you fired up, skeptical, somewhere in between? I'm curious how this lands.

Talk soon,
Chase