Growth Factor MethodGFM
Cognitive Performance Intelligence
Selective intake · Application required

Train the systems beneath cognition.

Systems upstream are capping your output. Find them, train them, prove what moved.

The 1:1 is a short fit conversation to determine whether GFM is appropriate for your goals. Nothing is charged when you book.

The Problem

You're measuring everything. None of it explains your worst weeks.

Effort goes into the wrong system, and nothing moves.
No cognitive outcome is attached to any of it.
Nothing confirms whether the change worked.

The question isn't whether you have enough data.
It's which systems are constraining you, and whether training them moves anything you can measure.

What You Actually Receive

Your constraints, ranked. One plan. Proof of what moved.

Not a dashboard. A reviewed document, in three parts. Some people have one constraint. Most have several, and the order matters.

Sample format Illustrative structure, not a real client
01
Highest-priority constraint

Autonomic regulation. Insufficient downshift between high-load blocks.

Resting heart rate stayed elevated into the evening on eleven of eighteen days, with HRV lowest after late cognitive work rather than after training. Cardiorespiratory fitness ranked second, and is addressed inside the same block.

HRV trendEvening RHRRespiratory rate
02
What gets trained, in priority order
  1. Down-regulation timed to the end of high-load blocks
  2. Aerobic base work — the most trainable system on this map
  3. Cognitive load progression, once regulation stabilises
  4. Sleep timing left alone. It is not a constraint here
03
What moved by week twelve Sample data
  • Evening RHR elevated11 days → 4
  • HRV trendDeclining → stable
  • VO₂ estimateMid → upper-mid
BaselineWeek twelve
Attention Below → within range
Reaction Time Unchanged
Working Memory Unchanged
Executive Control Below → marginal
Sustained Performance Below → within range
Visual Tracking / MOT Slightly lower

Both trained systems and the outputs most associated with them moved together. Two outputs did not move, and one came back slightly lower, which is within normal retest variation.

One person, twelve weeks, no control condition. Association, not proof of cause.

The Criterion

Want to feel the kind of cognitive load GFM measures?

Five rounds of multiple-object tracking, about two minutes. The objects never speed up; what changes is how many you hold and how long you hold them. Built for curiosity, not measurement, but it is the one part of GFM you can feel right now.

The full Cognitive Constraint Map uses a broader battery plus wearable/readiness context and operator review.

Try The Criterion → Schedule a 1:1 →
Cognitive Constraint Map

The systems beneath, mapped to performance.

This map is the core of what you receive: a reviewed picture of which systems beneath cognition may be shaping your focus, reaction speed, working memory, executive control, sustained performance, and visual tracking, ranked by how much each is likely holding you back, and where to train first. Line weight reflects evidence-informed relationship strength, then gets individualized through operator review.

Hover a system to isolate its performance outputs
Systems Beneath Cognition Performance Outputs
Strong Primary Moderate / Context-Dependent Indirect / Secondary

Line weights represent evidence-informed relationship strength and are individualized after operator review. They are not measured individual correlations or diagnostic claims.

The Sequence

Baseline. Map. Train. Retest.

01

Baseline

Existing wearable history, or 14 days

02

Assessment

Six-task battery + self-report

03

Constraint Map

Five systems, six outputs, reviewed

04

Train

Twelve weeks against the ranked constraints

05

Retest

Matched measures, before and after

Four measurement layers build every baseline.

EEG

Multichannel brain-state baseline

Longitudinal Physiology

VO₂, HRV, RHR, respiration, sleep

Cognitive Performance Battery

Six objective performance tasks

Validated Self-Report

Readiness, demands and subjective performance

The Core Offer

The complete 12-week protocol.

One engagement, baseline to retest. No subscription, no standalone reports.

The Engagement

Constraint Map + Protocol + Retest

Founding Intake
Selective intake · application required

The 1:1 is a short fit conversation to determine whether GFM is appropriate for your goals. Nothing is charged when you book.

Not an app, and not another dashboard. A human reviews your data, ranks the systems most likely limiting you, and builds the protocol around them in order.

  • Everything above, delivered 1:1 and operator reviewed
  • Twelve weeks of check-ins between map and retest
  • Matched retest with before / after interpretation
Schedule a 1:1
The Founding Group

GFM is opening with a small founding group, onboarded in pairs. These are the engagements that shape how the method is delivered, and founding clients keep advantages later clients will not have.

  • Permanent rate lock
  • Direct operator access
  • First access to new measurement layers
  • Supported tracker included
Limited founding intake now open. Terms are discussed on the 1:1, not published here.

The difference from generic wearable tracking: GFM pairs measured cognitive performance with your biometric context, then a human reviews the pattern with you. Not more data. Interpretation.

Getting Started

Two ways in. One protocol.

If you already wear a tracker, you start now.

You already wear a tracker

Start immediately

If you wear a Garmin, Whoop, Oura, or Apple Watch, GFM reviews your wearable history, runs the comprehensive baseline, and the twelve-week protocol begins straight away. Longer data windows strengthen interpretation.

Baseline → 12-week protocol → Retest  ·  ~14 weeks
No wearable yet

Fourteen days of measurement first

Without existing data there is nothing to interpret against, so the engagement opens with a 14-day observation window on a supported tracker. Founding clients have the tracker included. Then the baseline runs and the protocol begins.

14 days → Baseline → 12-week protocol → Retest  ·  ~16 weeks
Built By
Garrett Bussiere

Professional baseball gave me a decade inside measured performance. Every physical output tracked, every mechanical adjustment justified by data. What was never measured was the part that decided games: whether attention held through the ninth inning, whether reaction time survived a long road trip, whether the same swing arrived on four hours of sleep.

The fifteen years since have gone into the science of exactly that. GFM exists because most performance data never becomes a decision. The instruments to measure cognitive performance are real. What has been missing is someone willing to sit with one person's data and say plainly: this is the highest-priority constraint, this is what to train, and here is whether it worked.

Former Professional Baseball Player Cognitive Neuroscience, UC Berkeley 15+ years in cognitive assessment, neurotechnology, digital health, and human-performance commercialization
Good to Know

Questions & scope.

Who is this for?
Serious athletes, executives and founders, high-performing professionals, and teams who want interpretation rather than more raw data. It is a poor fit if you want a quick assessment with no follow-through, or a diagnosis. GFM is neither. Fit is confirmed on the first call, and if it isn't right you will hear that directly.
Do I need a wearable?
Yes. Physiological context is part of the method, not an add-on. If you already wear a Garmin, Whoop, Oura, or Apple Watch, GFM uses your existing history and the protocol begins immediately. If you don't, the engagement opens with a 14-day observation window on a supported tracker, which founding clients have included.
Which wearables work?
Garmin, Oura, Whoop, Apple Watch, Fitbit, and similar trackers. You share trend data and complete a short intake; no live device sync is required.
What do I receive?
A measured cognitive baseline, your operator-reviewed Constraint Map, a 1:1 review call, a prioritized twelve-week protocol with check-ins, and a matched retest with before-and-after interpretation and a next-stage plan.
Is this medical advice?
No. GFM does not provide medical diagnosis, treatment, or clinical advice. This is a performance-focused interpretation and coaching product.
What about youth athletes?
GFM works with parents, not directly with minors. Fit, appropriateness, and how the assessment would work for your athlete are discussed with you on the first call before anything is scheduled. Nothing here is diagnostic.
How much of my week does this take?
Baseline assessment takes approximately 60–90 minutes, completed according to the GFM testing instructions. The protocol itself is built to sit inside your existing routine rather than compete with it, and your wearable collects the physiology without daily logging on your part. Specifics are confirmed on the 1:1.
What happens on the 1:1?
A short fit conversation covering goals, current measurement history, timing, and questions. Nothing is charged when you book, and booking is not a guarantee of acceptance. If GFM isn't appropriate for your situation, you will hear that on the call.
What does it cost?
Engagements are priced per client and discussed on the 1:1. There is no checkout, no subscription, and nothing is charged when you book the call. Founding clients receive a permanent rate lock. The rate agreed at the start is the rate you keep as pricing moves.
What if the retest shows no change?
Then that is the finding, and you will be told so directly. A matched retest exists precisely so the answer can be no. That result still narrows the field. It rules out a candidate and informs what the next block should target, which is more than an unmeasured twelve weeks would have given you.
How is this different from my Whoop or Oura?
Those measure physiology and infer readiness. Neither measures cognition. GFM adds a six-task cognitive battery so there is an actual cognitive outcome to attach your physiology to, then a human reviews both together. The device tells you how you slept; this tells you which systems are limiting the thinking you get paid for.
Is the science solid, or is this biohacking?
The tasks are built on established paradigms from cognitive psychology, not proprietary games. Relationships between physiological systems and cognitive outputs are described as associations informed by published evidence, never as predictions about you specifically. Line weights on the Constraint Map reflect evidence-informed strength, then get individualized through review. Nothing here is diagnostic.
Who sees my data?
One person: the operator who reviews it. Your data is not sold, not used to train models, and not shared with third parties. You share trend exports rather than granting live account access, so you control what is handed over and can stop at any point.
How do I start?
Schedule a 1:1 fit conversation. If GFM is right for you and a founding place is open, intake and physiology baselining begin from there.
The Next Step

Find the constraints. Train the right systems.

One measured baseline. One reviewed map. Twelve weeks of focused training, then matched retesting to show what moved. Nothing is charged when you book.

Schedule a 1:1 Ask a Question First

Selective intake · application required  ·  Performance-focused · Non-diagnostic · Human-interpreted

Limited founding intake now open

Schedule a 1:1