How long ago did language arise?

A cognitive neuroscientist would be most likely to have subjects ________ to determine which brain areas are active during different mental tasks

a. discuss their most recent dreams b. utilize a technique called "priming" c. undergo fMRI, PET, or EEG testing d. take psychoactive drugs e. report on their ideas by using introspection

Peter rarely makes eye contact, seldom smiles, and infrequently talks in response to other people. He seems indifferent to everyone, including his parents. Which diagnosis is consistent with Peter's behavior?

a) autistic disorder b) mental retardation c) childhood schizophrenia d) obsessive-compulsive disorder