WIAT3 Tech Manual.pdf - CAMPBELA

Reliability and Validity 49Table 3.12Inclusion Criteria for Participation in Special Group StudiesGeneral Inclusion Criteria for Special GroupsStudents were eligible for inclusion if they met all of the following criteria:• primary language is English;• not primarily nonverbal or uncommunicative;• normal hearing and vision (with aid); normal fine and gross motor ability (with the exception of mild impairments associated with Mild IntellectualDisability or Disorder of Written Expression);• must be able to take the test in a standard fashion;• no physical conditions, illnesses, or impairments that could affect cognitive functioning or test performance (with the exception of conditions orimpairments associated with a specific special group);• no diagnosis of a Pervasive Developmental Disorder, or of Intellectual Disability (with the exception of the Mild Intellectual Disability group);• not currently admitted to a hospital, inpatient treatment, or psychiatric facility;• no diagnosis of a neurological condition (e.g., seizure disorder, epilepsy) and no history of a period of unconsciousness lasting 5 or more minutes(with the exception of the Mild Intellectual Disability group);• not currently taking medication that might impact test performance;• meets the criteria for one clinical group only (with the exception of the specified comorbid diagnoses permissible in the Learning Disorder clinicalgroups); and• has not completed the WIAT–III or any other similar individual achievement test in the 6 months prior to testing date.Academically GiftedMild Intellectual DisabilityReading DisorderDisorder of Written ExpressionSpecific Inclusion Criteria for Special Groups• General intellectual functioning, as measured by a standardized, individually administered intelligence test, is greaterthan or equal to 2 standard deviations above the mean (standard IQ/ability scores of 130 or above); or• If intelligence testing results are unavailable, standardized achievement test scores greater than or equal to 2 standarddeviations above the mean (standard achievement scores of 130 or above).• Meets DSM–IV–TR* criteria for mild mental retardation; Must demonstrate impairments in at least two areas ofadaptive functioning;• General intellectual functioning, as measured by a standardized, individually administered cognitive ability test, is2 to 3 standard deviations below the mean (standard IQ scores of 50–55 to approximately 70); May include studentsdiagnosed with Down Syndrome; and• May include students with a history of seizure disorder: seizures must be under control or the student must be seizurefreefor at least 1 year• Meets DSM–IV–TR* or IDEA 2004 diagnostic criteria for Reading Disorder;• May include students with a comorbid diagnosis of Disorder of Written Expression;• Meets criteria for either the IQ-Achievement Discrepancy criteria or the Intra-Achievement Discrepancy criteria:• IQ-Achievement Discrepancy criteria: General intellectual functioning, as measured by a standardized, individuallyadministered cognitive ability test, is between 1.5 standard deviations below the mean and 3 standard deviationsabove the mean (standard IQ/ability scores of 80–85 to approximately 145), and recent standard scores on tests ofreading accuracy and/or comprehension must be below average and discrepant from IQ/ability scores by at least 1standard deviation; or• Intra-Achievement Discrepancy criteria: Recent standard scores on tests of reading accuracy or comprehensionmust be below 85, and standard scores on tests of math, writing, or oral language must be above 90.• Meets DSM–IV–TR* or IDEA 2004 diagnostic criteria for Disorder of Written Expression;• May include students with a comorbid diagnosis of Reading Disorder;• Meets criteria for either the IQ-Achievement Discrepancy criteria or the Intra-Achievement Discrepancy criteria:• IQ-Achievement Discrepancy criteria: General intellectual functioning, as measured by a standardized, individuallyadministered cognitive ability test, is between 1.5 standard deviations below the mean and 3 standard deviationsabove the mean (standard IQ/ability scores of 80–85 to approximately 145), and recent standard scores on tests ofwritten expression must be below average and discrepant from IQ/ability scores by at least 1 standard deviation; or• Intra-Achievement Discrepancy criteria: Recent standard scores on tests of written expression must be below 85,and standard scores on tests of math, reading, or oral language must be above 90.Copyright © 2009 NCS Pearson, Inc. Normative data copyright © 2009 NCS Pearson, Inc. All rights reserved.