A method of creating a lot of ideas in a short period of time and expanding your thinking is called _________?

The method referred to in the question is brainstorming. Brainstorming is a technique widely used to generate a large number of ideas in a short span of time, encouraging participants to think freely and creatively without self-censorship. This technique fosters an open environment where all ideas are welcomed and can lead to innovative solutions. It is particularly useful in creative processes and problem-solving contexts where diverse perspectives can enhance outcomes.

In contrast, mind mapping involves visually organizing information around a central concept, which may not necessarily lead to rapid idea generation. Critical thinking focuses on analyzing and evaluating concepts or arguments logically, rather than generating ideas. Iterative design is a process of continuous refinement and testing, which is systematic and focused on improving existing designs, rather than on the initial generation of ideas. Thus, brainstorming best captures the essence of quickly expanding one's thinking and idea generation.