You can finally see how your sellers build trust, or lose it, under pressure.
Trust has always been the thing that decides the deal and the thing nobody could measure. The Seller Trust Index changes that. An AI coach scores how each rep actually builds trust in a real conversation, against a rubric where every criterion is anchored to peer-reviewed neuroscience.
Most coaching grades a call on a hunch. The Trust Index grades it on the science of how trust is built.
The Seller Trust Index Diagnostic listens to a real or simulated sales conversation and scores how the rep builds trust, moment by moment, against the NeuroSelling® six-step framework. It's the seller baseline that opens the Braintrust Operating System. Before we change a single behavior, you see the current default: exactly how each rep shows up when the pressure is on.
Trust shows up in three places. We score all three.
A buyer's brain reads far more than the words. The Trust Index measures the full signal, because a great script delivered the wrong way still reads as a threat.
The words
What the rep actually says: the questions they ask, whether they acknowledge before they pitch, whether the problem is framed as a shared challenge or an accusation. The substance of trust.
The delivery
How they say it: tone, pace, the use of silence, whether their energy matches the buyer's. The brain reads delivery in under a fifth of a second, before the words land. The same line builds or breaks trust depending on this.
The arc
Whether trust built in discovery carries, deepens, or quietly decays by the next meeting. Trust isn't a one-time judgment. It's rebuilt every time, and the Index tracks it across conversations.
Trust verified through science, not opinion.
Every criterion in the rubric is anchored to peer-reviewed neuroscience and psychology. So when a rep asks why a behavior mattered, the answer is never "because we think so." It's "because this study showed this mechanism in the brain."
Oxytocin builds trust
Landmark work in Nature (Kosfeld et al.) showed oxytocin increases trust and lowers threat sensitivity. The Index scores the behaviors that release it.
Naming emotion calms the brain
Lieberman's affect-labeling research found that naming what someone feels reduces amygdala reactivity. The Index rewards reps who do it.
Warmth is judged before competence
Fiske's universal model of social cognition shows the brain evaluates warmth first. The Index weights trust before the pitch, not after.
Stress shuts down the thinking brain
Arnsten's research on the prefrontal cortex explains why reps regress under pressure. The Index measures composure in exactly those moments.
This is neuroscience-validated behavioral measurement. Not methodology dogma.
It scores the six steps in the order the brain actually buys.
Each NeuroSelling step targets a specific neurochemical state, and the sequence is not interchangeable. Introduce tension before trust and the buyer blames the seller. The Index knows the difference, and scores whether the arc held.
Trust
The personal connection that signals safety
Perspective
Questions that make the buyer feel understood
Threats and risks
Tension framed as an external problem, not blame
Solutions
Relief mapped to the tension just established
Barriers
Fear met with trust, because data can't calm fear
Action
A partnership next step, never a pressure close
It even scores differently for a discovery call than a presentation, because the trust job is different in each.
It isolates the pressure moments and scores composure.
Anyone can sound polished in the easy stretch of a call. The Index finds the moments that actually test a rep and measures what happens in the seconds right after, because under pressure the thinking brain degrades and people regress to their habits, trained or not.
A direct objection
Does the rep stay curious, or escalate and defend?
An emotional disclosure
Does the rep meet the moment, or deflect to logistics?
A long silence
Does the rep hold it, or fill it with nervous talk?
A competitor mention
Does the rep get curious, or jump to a defensive pitch?
Telling their own story
Does the personal story land as genuine, or rehearsed?
Tracked over time
Composure under pressure should climb as habits form.
This is the whole thesis, measured: under pressure, people don't reach for their training. They reach for their habits.
A score, the reasons behind it, and a path forward.
A clear trust score for every conversation
A single, defensible read on how well the rep built trust, with the words, the delivery, and the arc all accounted for. Comparable across your team and over time.
Coaching tied to the exact moment and the science
For each moment that mattered: what the rep did, what the buyer's brain received, the research that explains why, and the better move. Specific enough to act on the next call.
A development arc, not a one-time grade
Because the Index runs on BTAI, reps can practice the same high-pressure moments again and again, and you watch composure and trust climb as the behavior hardwires.
The diagnostic that opens the whole system.
The Seller Trust Index is the seller baseline in Phase 1, Illuminate. It surfaces the current default before training begins, so every rep gets developed against what they actually do under pressure, not a generic curriculum.
You can't rewire a behavior you haven't seen clearly. This is how you see it.
How the diagnostic works.
What is the Seller Trust Index Diagnostic?
How do you measure trust in a sales conversation?
Is the Seller Trust Index based on real science?
What is a pressure composure score?
Does it score discovery and presentation calls differently?
Do we have to record live calls to use it?
See where the diagnostic leads.
See your team's real baseline under pressure.
Run the Seller Trust Index on a handful of conversations and get a direct, science-backed read on how your reps build trust when the stakes are high. No pitch, no pressure.
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