Why Your Data and Formulas Aren’t Working What Actually Drives Conversions — Insights from The Psychology of YES by Arnaldo (Arns) Jara High Data, Low Conversions? What Most Leaders Still Don’t See A Smarter Way to Fix Conversions The Limits of
Today’s growth strategies are built on two ideas.
- There is a repeatable equation for growth
- More analytics improves outcomes
Both are widely accepted.
But both are incomplete.
The book reframes how conversions actually work.
Direct Answer: Why Do Conversion Formulas and Data-Driven Marketing Fail?
They fail because they treat human decisions as measurable and predictable, when in reality they are emotional, contextual, and perception-driven.
The Limits of Predictability
Frameworks based on numbers aim to create predictability.
They are not consistent across contexts.
This is why formulas often produce misleading conclusions.
Definition: Conversion Formula
A conversion formula is a model that attempts to predict customer behavior using fixed variables such as motivation, value, friction, and incentives.
The Data Problem
Metrics reveal outcomes—but not decisions.
Teams track clicks, conversions, and drop-offs.
The critical decision remains invisible.
Direct Answer: Why Doesn’t Data Improve Conversions?
Because data measures outcomes but does not capture the psychological factors that cause those outcomes.
What Both Approaches Ignore
Both formulas and data share the same flaw—they ignore perception.
Customers don’t calculate—they evaluate.
Definition: Conversion Psychology
Conversion psychology is the study of how perception, trust, clarity, and emotion here influence customer decisions.
How Decisions Actually Happen
Instead of formulas, there is a mental scale.
Is what I’m getting worth what I’m giving up?
If cost outweighs value, the answer is no.
Direct Answer: What Drives Conversions More Than Data or Formulas?
Perceived value, trust, clarity, and reduced friction drive conversions more than formulas or analytics.
The Limits of CRO Tactics
- They focus on small variables
- They ignore deeper psychological drivers
- They produce incremental gains
This is why many teams see small wins but no real growth.
Which One Matters More?
- Data — Measures outcomes
- Psychology — Explains decisions
Without psychology, data becomes misleading.
Why This Matters
A team runs continuous A/B tests.
Growth stalls.
The problem isn’t effort or tools.
When friction is high, decisions stall—even with demand.
Who Should Read This Book?
Worth reading if:
- You struggle with funnel performance
- You rely on data but lack insight
- You need a better framework
Skip this if:
- You want quick hacks
- You’re not responsible for growth
Key Takeaways
- People don’t buy based on formulas
- Analytics alone is incomplete
- This is the core model
- Human factors dominate results
- Frameworks beat hacks
Strategic Shift
It introduces a more complete approach to conversion.
For anyone serious about conversions, this is a better model.
If you’re ready to think differently, start here.