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Quickly after PEAK was released to the public, it became a leading language and cognitive training technology for use with this population, adopted by thousands of behavior analysts and school teachers worldwide. The commercial release was also accompanied by a handful of peer-reviewed scientific research studies that demonstrated PEAK's potential as a reliable and valid assessment, and its potential for producing strong outcomes in persons with autism.

PEAK was created in the Spring of 2008 by Mark R. Dixon in response to the growing need for a contemporary, comprehensive, and easy to use ABA assessment and treatment program for children and adults with autism and related conditions.

(The original beta-testing book is shown below).

Over the next 6 years, PEAK evolved from a series of protocols that Dixon field tested throughout a handful of public school and clinical settings in Illinois, to a series of 4 books that each contained sections of the entire curriculum.


Most recently, an independent training and certification entity was eventually developed to ensure accurate training on PEAK and research groups unaffiliated with Dixon have been exploring the power of PEAK with several populations.

Some of the most active researchers of the PEAK system include: Jordan Belisle, Caleb R. Stanley, Kyle Rowsey, and Autumn McKeel. Some of the most prolific researchers of the PEAK system include Jordan Belisle, Caleb R. Stanley, Kyle Rowsey, and Autumn McKeel. These authors have all published multiple first-authored studies on PEAK, and this list is likely to grow along with the widespread use of PEAK to establish new, flexible skills in individuals with disabilities.

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