Compared with the population of people who have typical sex chromosomes, Nielsen and Wohlert (1991) found that populations with sex chromosome abnormalities were associated with

a. no increases in criminal activity, mental disorders, or physical disorders.
b. significant increases in mental retardation

A unique feature of the fMRI, as compared to the MRI, is the capacity to

a. detect cell activity throughout the brain. b. measure the magnetic fields in the brain. c. control brain activity by stimulating various brain regions. d. take a detailed X-ray of the brain while the person is conscious. e. distinguish more active tissues from less active ones.

People who can perform seemingly impossible feats of memory because of their highly developed memory skills are known as ______

a. semanticists c. mnemonists b. eideticists d. episodists