Intentional Behavioral Systems
Design
Reverse engineering interface to naturally shape behavior


One of the go-to apps for curating digital media, alongside Canva and Pinterest.
Reducing cognitive load so powerful functionality feels natural, turning thoughtful interactions into lasting habits, trust, and ultimately advocacy.
System 01 — Behavioral Extension
Shaping new rituals from existing ones
Different product structures naturally produce different behavior. The most enduring products rarely invent entirely new behaviors. Instead, they identify rituals that already exist in people’s lives and design structures that amplify them. Different product architectures naturally encourage different patterns of behavior. The hypothesis behind MoodStream was that changing the structure of sharing itself could create entirely new social rituals.
If every moment has a destination, people will naturally document more of their lives.
People do not naturally experience life as isolated moments. They capture collections of memories around experiences: blurry group photos, meals, concerts, trips, and everyday life, often tied to particular people, places, and occasions. Existing social products force these experiences into isolated pieces of content, fragmenting events that were originally connected and reducing rich experiences into individual uploads.
The hypothesis was to design a streamlined flow where people could capture multiple moments, send them directly into a designated space, and allow those experiences to accumulate into something larger over time. As people begin documenting their lives with the intention of contributing to personal or shared spaces centered around particular people, interests, and experiences, sharing stops feeling like publishing individual posts and starts feeling like creating a lasting visual story of everyday life that becomes easier to revisit and relive over time.
Reshaping an old habit into a new one
Deconstruct the familiar behavior
People already have an established behavior with their photos: capture, dump into a camera roll, then decide whether to post, save to an album, or forget it. The starting point is understanding that existing habit, not inventing a new one from scratch.
Find the natural inflection point
That moment of hesitation, “Where does this even go?”, is often the point where people abandon the thought entirely or leave it sitting in their camera roll. Instead of forcing a completely new workflow, that uncertainty becomes an opportunity to introduce a different behavior that still feels familiar.
Amplify it into a new pattern
Rather than replacing the old habit outright, we extend it. By giving people a place that naturally fits the moment, deciding what to do with a photo begins to feel almost automatic.
Let the new ritual become routine
Over time, the hesitation fades, and sorting moments into spaces built around friends, interests, and experiences becomes as natural as opening the camera roll.
The old way, versus the new one
Existing flow
MoodStream
QHow does changing the structure of sharing change the social rituals that emerge from it?
System 02 — Cognitive Extension
Spatial continuity
Complex product functionality does not have to feel overwhelming. Interface design should be intentionally centered around reducing cognitive load while preserving context as users move deeper into the product experience.
Space → depth → immersion → continuity
Reducing visual complexity and decision making is essential for making intricate product environments feel intuitive.
Immersive Hierarchy While Preserving Context
Interfaces should feel like continuous spaces, not disconnected screens. Users should not feel like they are constantly navigating between separate pages. Instead, every interaction should feel like moving deeper into the same environment.
Embedded Interactions for Real-Time Feedback
Interfaces should minimize the distance between intention and feedback, allowing users to think through interaction.
QDoes this interaction preserve the user’s sense of place, or does it force them to start over?
