Behavioral Economics Applied to Fast Fashion
Role
Co-Researcher & Designer
Team of 3
Duration
Fall 2025
UXP 365 Design Systems
Tools
Figma, SPSS,
Behavioral Economics Frameworks
Research Foundation
PSY 280 Research Methods
N=95, r=−0.230, p=.025
SHEIN emitted approximately 16.7 million metric tons of CO2 in 2023. Its business model is built on one behavioral mechanism: make buying so fast, so cheap, and so frictionless that the user never stops to think. My PSY 280 correlational study proved that compulsive buying statistically decreases wellbeing (N=95, r=−0.230, p=.025). The design question became: if guilt campaigns fail, what if a platform could trigger warm glow — the measurable wellbeing increase from prosocial behavior — before and during the purchase?
Problem
SHEIN's entire UX is engineered to make irresponsibility effortless. Buying a new shirt is a two-click dopamine hit. Repairing one is a chore. Most sustainability campaigns fail because they target motivation alone — they show you the carbon data, make you feel guilty, and assume that if you care enough you will change. But people already know impulsive shopping makes them feel worse. The motivation to change exists. The reason behavior does not change is that the current system has made the wrong habits effortlessly easy.
The Fogg Behavior Model states that behavior happens when Motivation, Ability, and a Prompt converge at the same moment — B=MAP. The gap was never motivation. It was Ability. This redesign focused almost entirely on shrinking the friction of circular behavior until it felt as easy as the behavior it was replacing.
Process & Research
The redesign was grounded in two bodies of research: my own primary correlational study from PSY 280 establishing the compulsive buying — wellbeing relationship, and Andreoni and Dunn's warm glow research showing that prosocial behavior produces measurable increases in wellbeing. Together they reframed the design argument from guilt-based restriction to positive reinforcement.
Physical redesign addressed the product itself — garments reimagined using 100% single-fiber monomaterial construction, eliminating unrecyclable blends and enabling true fiber-to-fiber recycling. Digital redesign addressed the behavioral architecture, with every feature mapped to a specific friction point in the circular loop.
Evidence
Digital Product Passport — Embedded as a QR/NFC tag in each garment. Material composition, carbon footprint, water usage, and full ownership and repair history visible at the moment of purchase. The Prompt in the B=MAP equation.
Re-Commerce Hub — Instant trade-in with a prepaid shipping label or consignment option for items in excellent condition. Circular action made as easy as disposal.
Milestone Ranking System — Bronze through Diamond. Status and positive reinforcement rather than guilt. Circular credits earned through repairs, trade-ins, and sustainable purchases unlock discounts and exclusive collections.
Sustainability Scoring — Products with three or fewer stars receive a visible message explaining their lower environmental impact. Information delivered at the point of decision — not shame, just data.
Outcome
UX scoring comparison across six sustainability dimensions — material sustainability, longevity, repairability, usability, emotional connection, and end-of-life impact — showed measurable improvement from baseline scores of 1–2 to redesigned scores of 3–4 across all dimensions. Six months into using the redesigned platform, a user would own less but know more about what they own.
Honest Reflection
Fast fashion is, behaviorally speaking, a drug. The system I designed is the best possible rehabilitation program. But there is a real risk that users will game the milestone system — collecting circular credits to fund more purchases and potentially accelerating the consumption cycle I was trying to interrupt.
That tension is not a failure of the design. It is the honest boundary of what UX can solve alone. Design can reduce friction, surface information, and create the conditions for better decisions. It cannot replace the business model that profits from the opposite. Don't lecture. Don't guilt. Make it easy. Make it feel good. Let the data do the rest.