Similar concordance rates for a given trait in monozygotic (MZ) and dizygotic (DZ) twins suggests that the trait may be due to

Which of the following is NOT a key diagnostic aspect for intellectual disability?

a. Onset before age 18 years b. Features of autism in communication ability c. Deficits in adaptive functioning d. Poor cognitive development

Based on research investigating the link between language and thought, Benjamin Whorf concluded that:

A) thought determines language because thinking precedes communication. B) language cannot determine thought because thought is essentially an aspect of communication. C) language has no influence on thought. D) language shapes thought.