Documentation:  The presence of a mental disorder in a child must be documented on the basis of reports
                  from acceptable sources of medical evidence. See§§404.1513 and 416.913. Descriptions
                  of functional limitations may be available from these sources, either in the form
                  of standardized test results or in other medical findings supplied by the sources,
                  or both. (Medical findings consist of symptoms, signs, and laboratory findings.) Whenever
                  possible, a medical source's findings should reflect the medical source's consideration
                  of information from parents or other concerned individuals who are aware of the child's
                  activities of daily living, social functioning, and ability to adapt to different
                  settings and expectations, as well as the medical source's findings and observations
                  on examination, consistent with standard clinical practice. As necessary, information
                  from nonmedical sources, such as parents, should also be used to supplement the record
                  of the child's functioning to establish the consistency of the medical evidence and
                  longitudinality of impairment severity.
               
               
               For some newborn and younger infants, it may be very difficult to document the presence
                  or severity of a mental disorder. Therefore, with the exception of some genetic diseases
                  and catastrophic congenital anomalies, it may be necessary to defer making a disability
                  decision until the child attains 3 months of age in order to obtain adequate observation
                  of behavior or affect. See, also, 110.00 of this part. This period could be extended
                  in cases of premature infants depending on the degree of prematurity and the adequacy
                  of documentation of their developmental and emotional status.
               
               
               For infants and toddlers, programs of early intervention involving occupational, physical,
                  and speech therapists, nurses, social workers, and special educators, are a rich source
                  of data. They can provide the developmental milestone evaluations and records on the
                  fine and gross motor functioning of these children. This information is valuable and
                  can complement the medical examination by a physician or psychologist. A report of
                  an interdisciplinary team that contains the evaluation and signature of an acceptable
                  medical source is considered acceptable medical evidence rather than supplemental
                  data.
               
               
               In children with mental disorders, particularly those requiring special placement,
                  school records are a rich source of data, and the required reevaluations at specified
                  time periods can provide the longitudinal data needed to trace impairment progression
                  over time.
               
               
               In some cases where the treating sources lack expertise in dealing with mental disorders
                  of children, it may be necessary to obtain evidence from a psychiatrist, psychologist,
                  or pediatrician with experience and skill in the diagnosis and treatment of mental
                  disorders as they appear in children. In these cases, however, every reasonable effort
                  must be made to obtain the records of the treating sources, since these records will
                  help establish a longitudinal picture that cannot be established through a single
                  purchased examination.
               
               
               A reference to standardized psychological testing indicates the use of a psychological
                  test that has appropriate characteristics of validity, reliability, and norms, administered
                  individually by a psychologist, psychiatrist, pediatrician, or other physician specialist
                  qualified by training and experience to perform such an evaluation. Psychological
                  tests are best considered as sets of tasks or questions designed to elicit particular
                  behaviors when presented in a standardized manner.
               
               
               The salient characteristics of a good test are: (1) Validity, i.e., the test measures
                  what it is supposed to measure, as determined by appropriate methods; (2) reliability,
                  i.e., the consistency of results obtained over time with the same test and the same
                  individual; and (3) appropriate normative data, i.e., individual test scores must
                  be comparable to test data from other individuals or groups of a similar nature, representative
                  of that population. In considering the validity of a test result, any discrepancies
                  between formal test results and the child's customary behavior and daily activities
                  should be duly noted and resolved.
               
               
               Tests meeting the above requirements are acceptable for the determination of the conditions
                  contained in these listings. The psychologist, psychiatrist, pediatrician, or other
                  physician specialist administering the test must have a sound technical and professional
                  understanding of the test and be able to evaluate the research documentation related
                  to the intended application of the test.
               
               
               Identical IQ scores obtained from different tests do not always reflect a similar
                  degree of intellectual functioning. The IQ scores in listing 112.05 reflect values
                  from tests of general intelligence that have a mean of 100 and a standard deviation
                  of 15, e.g., the Wechsler series and the Revised Stanford-Binet scales. Thus, IQ's
                  below 60 reflect a level of intellectual functioning below 99.5 percent of the general
                  population, and IQ's of 70 and below are characteristic of approximately the lowest
                  2 percent of the general population. IQ's obtained from standardized tests that deviate
                  significantly from a mean of 100 and standard deviation of 15 require conversion to
                  the corresponding percentile rank in the general population so that the actual degree
                  of impairment reflected by the IQ scores can be determined. In cases where more than
                  one IQ is customarily derived from the test administered, e.g., where verbal, performance,
                  and full scale IQ's are provided, as on the Wechsler series, the lowest of these is
                  used in conjunction with listing 112.05.
               
               
               IQ test results must also be sufficiently current for accurate assessment under 112.05.
                  Generally, the results of IQ tests tend to stabilize by the age of 16. Therefore,
                  IQ test results obtained at age 16 or older should be viewed as a valid indication
                  of the child's current status, provided they are compatible with the child's current
                  behavior. IQ test results obtained between ages 7 and 16 should be considered current
                  for 4 years when the tested IQ is less than 40, and for 2 years when the IQ is 40
                  or above. IQ test results obtained before age 7 are current for 2 years if the tested
                  IQ is less than 40 and 1 year if at 40 or above.
               
               
               Standardized intelligence test results are essential to the adjudication of all cases
                  of mental retardation that are not covered under the provisions of listings 112.05A,
                  112.05B, and 112.05F. Listings 112.05A, 112.05B, and 112.05F may be the bases for
                  adjudicating cases where the results of standardized intelligence tests are unavailable,
                  e.g., where the child's young age or condition precludes formal standardized testing.
               
               
               In conjunction with clinical examinations, sources may report the results of screening
                  tests, i.e., tests used for gross determination of level of functioning. These tests
                  do not have high validity and reliability and generally are not considered appropriate
                  primary evidence for disability determinations. These screening instruments may be
                  useful in uncovering potentially serious impairments, but generally must be supplemented
                  by the use of formal, standardized psychological testing for the purposes of a disability
                  determination, unless the determination is to be made on the basis of findings other
                  than psychological test data; however, there will be cases in which the results of
                  screening tests show such obvious abnormalities that further testing will clearly
                  be unnecessary.
               
               
               Where reference is made to developmental milestones, this is defined as the attainment
                  of particular mental or motor skills at an age-appropriate level, i.e., the skills
                  achieved by an infant or toddler sequentially and within a given time period in the
                  motor and manipulative areas, in general understanding and social behavior, in self-feeding,
                  dressing, and toilet training, and in language. This is sometimes expressed as a developmental
                  quotient (DQ), the relation between developmental age and chronological age as determined
                  by specific standardized measurements and observations. Such tests include, but are
                  not limited to, the Cattell Infant Intelligence Scale, the Bayley Scales of Infant
                  Development, and the Revised Stanford-Binet. Formal tests of the attainment of developmental
                  milestones are generally used in the clinical setting for determination of the developmental
                  status of infants and toddlers.
               
               
               Formal psychological tests of cognitive functioning are generally in use for preschool
                  children, for primary school children, and for adolescents except for those instances
                  noted below.
               
               
               Exceptions to formal standardized psychological testing may be considered when a psychologist,
                  psychiatrist, pediatrician, or other physician specialist who is qualified by training
                  and experience to perform such an evaluation is not readily available. In such instances,
                  appropriate medical, historical, social, and other information must be reviewed in
                  arriving at a determination.
               
               
               Exceptions may also be considered in the case of ethnic/cultural minorities where
                  the native language or culture is not principally English-speaking. In such instances,
                  psychological tests that are culture-free, such as the Leiter International Performance
                  Scale or the Scale of Multi-Culture Pluralistic Assessment (SOMPA) may be substituted
                  for the standardized tests described above. Any required tests must be administered
                  in the child's principal language. When this is not possible, appropriate medical,
                  historical, social, and other information must be reviewed in arriving at a determination.
                  Furthermore, in evaluating mental impairments in children from a different culture,
                  the best indicator of severity is often the level of adaptive functioning and how
                  the child performs activities of daily living and social functioning.
               
               
                Neuropsychological testing refers to the administration of standardized tests that are reliable and valid with
                  respect to assessing impairment in brain functioning. It is intended that the psychologist
                  or psychiatrist using these tests will be able to evaluate the following functions:
                  Attention/concentration, problem-solving, language, memory, motor, visual-motor and
                  visual-perceptual, laterality, and general intelligence (if not previously obtained).