Spatial Intelligence is an area in the theory of multiple intelligences that deals with spatial judgment and the ability to visualize with the mind's eye. It is defined by Howard Gardner as a human computational capacity that provides the ability or mental skill to solve spatial problems of navigation, visualization of objects from different angles and space, faces or scenes recognition or to notice fine details. Gardner further explains that Spatial Intelligence could be more effective to solve problems in areas related to realistic, thing-oriented, and investigative occupations.

This capability is a brain skill that is also found in people with visual impairment. The spatial reasoning of the blind person allows them to translate tactile sensations into mental calculation of length and visualisation of form.

Spatial intelligence would be important for students interested in studying architecture or engineering. He/she might be an inventor or develop factory processes, or an artist/sculptor. If you can visualize internally in three dimensions, you can more easily get a sense of how something looks or works from all angles.

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Sources:
https://www.udemy.com/blog/visual-spatial-intelligence/
https://en.wikipedia.org/wiki/Spatial_intelligence_(psychology)