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Uncovering the hidden forces shaping user behavior
Thursday, July 17, 2025 • Rosenfeld Community
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Uncovering the hidden forces shaping user behavior
Speakers: David Sternberg
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Summary

Why do users behave in ways that seem so unpredictable? Traditional funnels and post-hoc analytics often miss the hidden forces behind hesitation, backtracking, and abandonment. This session with David Sternberg draws on Quantum-Fluid Dynamics to introduce a new dynamic framework for understanding and shaping user flow—revealing the competing motivations and cognitive forces at play. Join us to learn how to move beyond surface metrics to diagnose, predict, and influence user behavior with sharper insights, enabling smarter design decisions and saving your team time and resources.

Key Insights

  • Traditional UX methods like A/B testing and user journeys are reactive and observe user behavior post-facto, limiting proactive design.

  • User intent exists as a cloud of probabilistic potential actions, akin to quantum superposition, until an interaction collapses it into a decision.

  • The QFI model uses the analogy of fluid dynamics to describe user flows, with interface elements shaping paths like landscapes shape currents.

  • Momentum in UX reflects user motivation and energy, driving faster and more decisive interactions similar to strong fluid currents.

  • Friction or cognitive viscosity represents obstacles in the interface that slow or block user flow, causing frustration or abandonment.

  • Behavioral turbulence arises from breakdowns in flow, leading to chaotic, unpredictable user actions like rage taps or loops.

  • QFI introduces the concept of an intent Hamiltonian, representing forces altering user probabilistic states towards one outcome or another.

  • Interfaces should be designed to guide and choreograph intentions, shaping gradients of motivation and friction rather than forcing actions.

  • QFI is a scientific framework aiming to shift UX from craft relying on intuition to a predictive science based on models and measurements.

  • The framework supplements, not replaces, UX research and design; it amplifies understanding to generate better hypotheses and experiments.

Notable Quotes

"Human behavior is anything but linear, rational, or predictable."

"User intent exists in a probabilistic superposition of multiple possible actions until a choice is made."

"When you observe a quantum particle, its possible states collapse to one—just like user intent collapses to action."

"The interface you’ve designed is like a landscape shaping the flow of user behavior as water flows through a stream."

"Momentum in users is like energy in fluid—strong motivation drives fast, decisive movement."

"Friction isn’t just annoying; it’s a force that reshapes behavior and can slow or stop user flow."

"Behavioral turbulence happens when flow breaks down, causing chaotic and unpredictable user interactions."

"Every piece of product can be described using components like intent, viscosity, and flow—making UX a physics problem."

"With QFI, we go upstream: simulate, model, predict user behavior before shipping, not just react after."

"You don’t design interfaces anymore—you choreograph intentions."

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