text: or assessment situation. Reliability indicates the test’s ability to produce the same result when given to the
  the researchers and should be a representative sample of the population who will be taking the test. All
  psychological tests should also be examined for the cultural biases. Adrian Dove created an intelligence
  mental retardation), occurs in about 3 percent of the U.S. population and is defined by an IQ score of 70
  significantly below the expected level for the person’s age group. Diagnosis of intellectual disability is
  determined by the person’s intellectual and adaptive behavior skills, psychological and emotional levels,
  Association on Intellectual and Developmental Disabilities also require deficits in more than one of these
  areas. Intellectual disability is classified from mild to moderate, severe, and profound. Environmental
  conditions during a child’s development can affect brain function and may influence the development of
  Individuals who receive scores of 130 or above on intelligence tests are referred to as gifted. Lewis
  Terman conducted a longitudinal study of the traits and behaviors of more than 1,500 gifted children. The
  success in life. Further research in this area is still needed. The role of a person’s environment, or
  nurture, and heredity, also referred to as nature, on the development of intelligence continues to be
  debated. Studies of identical and fraternal twins raised together and apart have provided one method for
  units of sound into the smallest units that have meaning. Grammar includes all the rules for combining
  with the practical aspects of communicating with others. The relationship between language and thought
  world. An opposing theory, known as cognitive universalism, proposes that certain ways of thinking are