Rosch argues the basic level is psychologically special because going to the global level entails a large loss of information and moving to the specific level only provides a little gain in information.

University of Michigan - Ann Arbor

According to Rosch, categories can be organized by hierarchical levels based on the size and specificity of the category compared to others it encompasses or is encompassed by. They are said to be broken down into three main levels:
- The global (superordinate)
- The basic
- The specific (subordinate)

Rosch's approach to Hierarchical Organization of Categories 

Goldstein, E. B. (2014). Cognitive psychology: Connecting mind, research and everyday experience. Nelson Education.


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