Evidence of a qualifying FSIQ is derived from one of the tests listed in the table below.
Assessment | Qualifying score at more than 2 standard deviations | Qualifying score at more than 1.5 standard deviations | Qualifying score at more than 1 standard deviation |
Stanford-Binet 4th edition or earlier editions | 67 or less | 75 or less | 83 or less |
Stanford-Binet 5th edition | 69 or less | 77 or less | 84 or less |
Wechsler intelligence scales (Wechsler) | 69 or less | 77 or less | 84 or less |
Differential abilities scale (DAS) | 69 or less | 77 or less | 84 or less |
Kaufman assessment battery for children (K-ABC) | 69 or less | 77 or less | 84 or less |
Das-Naglieri cognitive assessment system (CAS) | 69 or less | 77 or less | 84 or less |
Woodcock-Johnson-III test of cognitive abilities (WJ III(r)) | 69 or less | 77 or less | 84 or less |
(1) The test must be administered by a licensed psychologist or Washington certified school psychologist or other school psychologist certified by the National Association of School Psychologists.
(2) The FSIQ score cannot be attributable to mental illness or other psychiatric condition occurring at any age; or other illness or injury occurring after age eighteen:
(a) If you are dually diagnosed with a qualifying condition and mental illness, other psychiatric condition, or other illness or injury, you must provide acceptable documentation that your intellectual impairment, measured by a FSIQ test, would meet the requirements for DDA eligibility without the influence of the mental illness, other psychiatric condition, or other illness or injury.
(b) "Acceptable documentation" means written reports or statements that are directly related to the subject at issue, reasonable in light of all the evidence, and from a source of appropriate authority. The determination of whether a document is acceptable is made by DDA.
(c) If no documentation is provided or DDA determines that the documentation is not acceptable DDA will deny eligibility. The determination may be challenged through an administrative appeal.
(3) If you have a vision impairment that prevents completion of the performance portion of the IQ test, the administering professional may estimate an FSIQ using only the verbal IQ score of the appropriate Wechsler.
(4) If you have a significant hearing impairment, English is not your primary language, or you are nonverbal your FSIQ may be estimated using one of the tests shown in the table below.
Assessment | Qualifying score at more than 2 standard deviations | Qualifying score at 1.5 or more standard deviations | Qualifying score more than 1 standard deviation |
Wechsler intelligence scales (WISC, WAIS) | 69 or less on the performance scale, or, on both the perceptual reasoning index and processing speed index | 77 or less on the performance scale, or, on both the perceptual reasoning index and the processing speed index | 84 or less on the performance scale, or, on both the perceptual reasoning Index and the processing speed index |
Leiter international performance scale-revised (Leiter-R) | 69 or less | 77 or less | 84 or less |
Comprehensive test of nonverbal intelligence (C-TONI) | 69 or less on full scale (NVIQ) | 77 or less on full scale (NVIQ) | 84 or less on full scale (NVIQ) |
Kaufman assessment battery for children (K-ABC) | Nonverbal scale index of 69 or less | Nonverbal scale index of 77 or less | Nonverbal scale index of 84 or less |
(5) If you are over the age of nineteen at the time of your determination you must have a valid FSIQ obtained at age thirteen or older.