Mental rotation is a cognitive process that involves visualizing and manipulating objects in one's mind. It allows individuals to imagine how an object would look if it were turned or flipped in space. This skill is often tested in psychological experiments, where participants are asked to identify whether two images of 3D shapes are the same or different after being rotated. Research shows that mental rotation abilities can vary among individuals and are influenced by factors such as gender, age, and experience with spatial tasks. This ability is important in various fields, including architecture, engineering, and art, where spatial visualization plays a crucial role in problem-solving and design.