Investigate Diagnostic validity of the third edition of the new Wadkock-Johnson Cognitive Ability Scale in Learning Disabled Students in Ahvaz city

The purpose of this study was to investigate Learning disability diagnostic validation by Woodcock-Johnson III Tests of Cognitive Abilities in Ahvaz city. Statistical Society this study includes all male and female students with learning disabilities from the first to fifth grade of elementary school in Ahvaz. In the academic year 2012-2013, from the state and non-governmental centers, the individual learning problems of the city received special educational-therapeutic services. The research sample consisted of 60 students with learning disabilities who were selected through purposeful sampling. For data collection was completed the fourth edition of the Wechsler Intelligence Scale and Scaled cognitive abilities, Woodcock-Johnson III version was used. The descriptive study design was of similar causal type. The information gathering method was fieldwork and individual and face-to-face method; Direction data analysis descriptive statistics methods such as frequency, percentage, mean, standard deviation were used. The results of the research showed that student intelligence unable to learn "active memory" and "total scale" Less than usual students there is also a significant difference between the similarities, vocabulary, understanding, information, Reasoning word, image Concepts, Number capacity, Number sequence -Character and symbolism. There are equal learning scores in learning disabilities and the factors of similarities, vocabulary, understanding, information,  reasoning word, Image concepts, number capacity,  number sequence - letter and symbolizing in diagnosis, students with learning disabilities have diagnostic validity.