Observable behavior, such as test scores, is the gold standard by which we make judgments about levels of function, grade placements, and the presence/absence of pathology. Individual differences in test performance have long intrigued researchers and clinicians, and some have noted how people can come up with essentially the same answers using…

This study assesses the adequacy of item gradients and ceilings for the subtests of the Woodcock-Johnson III (WJ III) Cognitive and Achievement batteries, including the Diagnostic Supplement, in their use with participants ages 16 to 25 and Grades 10 to 18. Of the 52 subtests, 18 contain adequate item gradients and ceilings for the entire age and…

The widely used Woodcock Johnson (WJ) Test of Achievement has been separated into two distinct tests, Achievement and Cognitive Abilities. This book is designed to help busy mental health professionals acquire the knowledge and skills they need to use the third revision of the WJ Tests of Achievement (WJ III ACH) , including administration,…