An Alabama man challenged his death sentence after a murder conviction because of his varying results in a series of I.Q. tests.

Since the latter part of the 19th and early 20th centuries, intelligence tests have attempted to measure human intellectual capabilities. The most common assigns an intelligence quotient, or IQ, score ...

By John Kruzel WASHINGTON, May 21 (Reuters) - The U.S. Supreme Court on Thursday dismissed a challenge by Alabama officials to a judicial finding that a death row inmate convicted of a 1997 murder is ...

Intellectual disability is a disorder marked by below-average intellectual function and a lack of skills necessary for independent daily living. The condition begins in the developmental period. The ...