Michael C. Frank, a developmental psychologist at Stanford University, studied which indigenous language of the Amazonas in Brazil?
Michael C. Frank: Michael C. Frank is a developmental psychologist at Stanford University who proposed that infants' language development may be thought of as a process of Bayesian inference. Michael C. Frank:  He has also studied the role of language in numerical cognition by comparing the performance of native Pirahã language speakers to that of MIT undergraduate students in numeric tasks. Pirahã language: Pirahã (also spelled "Pirahá, Pirahán"), or Múra-Pirahã, is the indigenous language of the isolated Pirahã of Amazonas, Brazil.
Pirahã language