Sludge / Dark Patterns
Deceptive or manipulative design patterns that exploit psychological biases to drive user behavior against their interests.
Sludge and dark patterns are design techniques that manipulate users into actions they wouldn't choose freely: hidden unsubscribe buttons, pre-checked consent boxes, countdown timers that reset, and gamification that creates addiction-like engagement. In the JTBDUX framework, these are considered anti-patterns because they serve the product's metrics rather than the user's progress. The Duolingo Effect is a case study: the product drove 50 million daily users through behavioral loops so powerful that users felt manipulated, not motivated. Ethical product design respects user autonomy and uses behavioral science to accelerate progress, not to extract engagement.