Assessing higher-level verbal repertoires of individuals with autism and related intellectual disabilities is crucial due to the language and cognitive deficits experienced by this population as well as is the need for valid assessment tools for data-driven and individualized treatment. In addition to, curricula or instructional protocols that produce changes toward improvement of language and cognitive skills are vital to the overall well being of these individuals. Several assessments and instructional guides are available to behavior analysts however few have demonstrated evidence of validity, reliability, and/or utility in its effectiveness in producing causal changes in higher-level cognition and adaptive ability. The presentation will present correlational data between PEAK-T with IQ (WISC-V) as well as provide preliminary normative sample data of PEAK-T-PA with neuro-typical children. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]