Categorizing Smells: A Localist Approach.

Area of Science:

• Psychology
• Neuroscience
• Sensory Science

Background:

• Humans exhibit deficits in identifying and communicating about smells compared to other senses.
• The absence of a global conceptual space for odors is often cited as the reason for poor olfactory perception.
• This lack of a conceptual space is thought to hinder the organization and comparison of odor sensations.

Purpose of the Study:

• To challenge the prevailing view that the absence of a global odor space implies no olfactory conceptual mapping.
• To propose a "localist account" where conceptual spaces exist for subsets of odors.
• To re-interpret expert and cross-cultural odor categorization studies as evidence for these local conceptual spaces.

Main Methods:

• Literature review and theoretical analysis of existing psychological and sensory science research.
• Re-evaluation of data from expert and cross-cultural odor categorization studies.
• Development of a localist framework to explain olfactory perception and categorization.

Main Results:

• The claim of no "odor space" is only true for a global, paradigmatic conceptual space, akin to color.
• Local conceptual spaces, representing specific odor subsets, demonstrably exist.
• Expert and cross-cultural categorization studies support the existence of these local olfactory spaces.

Conclusions:

• The absence of a global odor space does not preclude the existence of olfactory conceptual maps.
• A localist account offers a more nuanced understanding of olfactory perception and categorization.
• This framework reconciles seemingly contradictory findings in odor identification and communication studies.