You'll complete the same task twice: once with all options visible (flat), and once with progressive disclosure (step-by-step). We'll measure which approach is faster and less error-prone.
Formulated by Popularized by Jakob Nielsen, building on Jef Raskin
Progressive disclosure means showing users only the options they need right now, and deferring secondary or advanced features to a later screen or an expandable section.
The technique was popularized in interface design by usability researcher Jakob Nielsen, building on ideas from computer scientist Jef Raskin about staged information reveal.
A classic example is a settings page that shows the basics up front with an 'Advanced' toggle for power users, keeping the interface approachable without removing capability.