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The Woodcock-Johnson III Test

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Age equivalents, grade equivalents, standard scores, and percentile ranks are used for scoring and for interpretation of the Woodcock-Johnson III test. Age equivalents is also known as the age score, this reflects the examinees performance in terms of age level in the norming sample at which the average score is equal to the examinee score (Schrank & McGrew, 2001). Grade equivalents is also known as the grade score, this reflects the examinees performance in terms of the grade level in the norming sample at which the average score is equal to the examinees score (Schrank & McGrew, 2001). The standard score of the Woodcock Johnson test represents the examinees performance comparative to the mean performance of the comparison group. The average standard score is 100 with a deviation of 15. Percentile rank describes the subject’s relative standing as compared to his or her peers on a scale of 1-100. (Schrank &McGrew, 2001). Technical Properties Standardization…show more content…
The subjects were given both batteries of the Woodcock-Johnson III test, including WJ III COG and WJ III ACH, for the normative data to be based on a common sample. Subjects of the age range of 2-5 consisted of 1,143 participants, these subjects were not enrolled in kindergarten. The kindergarten age group through 12th grade sample group included 4,783 subjects. The college/university sample of subjects consisted of 1,165 people. The adult sample of subjects was composed of 1,843 individuals (Schrank & McGrew,
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