In addition, domain-specific accounts draw support from the surprising competencies of infants, who are able to reason about things like numerosity, goal-directed behavior, and the physical properties of objects all in the first months of life.
For humans, popular candidates include reasoning about objects, other intentional agents, language, and number.
[2] Researchers in this field seek evidence for domain specificity in a variety of ways.
Some look for unique cognitive signatures thought to characterize a domain (e.g. differences in ways infants reason about inanimate versus animate entities).
Abstracts from chapters in Mapping the Mind: Domain Specificity in Cognition and Culture, a collection of essays on domain-specificity.