For many decades, discussions regarding the definition and identification of learning disabilities have been contentious; one result is the varied practices across states and school districts. This study reviewed learning disability (LD) regulations and guidelines from the 50 United States and the District of Columbia that were employed during 2013. Two authors independently coded components of all LD regulations and guidelines. Results showed considerable variability in the state policies and practices governing LD identification. Only 67% of states allow for use of the ability-achievement discrepancy approach, and 20% of states explicitly prohibit its use. Approximately 16% of states require the sole use of response to intervention (RtI) models in LD identification, and there is considerable variability in the guidance states provide regarding how to implement RtI models to identify LD. Finally, about half of states do not allow use of "pattern of strengths and weaknesses" (PSW) models, and most states allowing these models provide little information regarding ideal identification practices. These results can inform school psychology practice, training, and related research.

A known-groups design was used to determine the classification accuracy of 12 Booklet Category Test variables in the detection of malingered neurocognitive dysfunction (MND) in traumatic brain injury (TBI). Participants were 206 TBI and 60 general clinical patients seen for neuropsychological evaluation. Slick, Sherman, and Iverson's (1999) criteria were used to classify the TBI patients into non-malingering, suspect, and MND groups. Classification accuracy of the BCT depended on the specific variable and injury severity examined, with some scores detecting more than 40% of malingerers with false positive error rates of 10% or less. However, the BCT variables are often influenced by cognitive ability as well as malingering, so caution is indicated in applying the BCT to the diagnosis of malingering. Application of these data in clinical practice is discussed.