Which technique focuses specifically on generating numerous ideas in a short time?

The technique that focuses specifically on generating numerous ideas in a short time is brainstorming. Brainstorming is a popular method used in both UI and UX design to foster creativity and encourage the free flow of ideas among team members. This approach typically involves gathering a group of people who contribute their thoughts spontaneously, without judgment or immediate evaluation of the ideas presented. The goal is to create an environment that stimulates creative thinking, allowing participants to build on each other's suggestions and explore a wide range of possibilities quickly.

In contrast, mind mapping, while it can aid in organizing ideas and showcasing relationships among them, doesn't inherently prioritize the volume of ideas generated. Prototyping is focused on translating concepts into tangible representations, and testing involves evaluating those ideas or prototypes against real user feedback to refine them further. Brainstorming stands out as the technique that centralizes idea generation, making it particularly effective when rapid, varied input is needed.