Publications Nefdt, Koegel, Singer & Gerber (2010). The Use of a Self-Directed Learning Program to Provide Introductory Training in Pivotal Response Treatment to Parents of Children With Autism. Journal of Positive Behavior Interventions 12; 1, 23-32. Ruef, Nefdt, Openden, Elmensdorp, Harris & Robinson (2009). Learn by Doing: A Collaborative Model for Training Teacher-Candidate Students in Autism. Education and Training in Developmental Disabilities, 2009, 44(3), 343-355 Bryson, S., Koegel, L.K., Koegel, R.L., Openden, D., Smith, I., & Nefdt, N. (2007). Large Scale Dissemination and Community Implementation of Pivotal Response Treatment: Program Description and Preliminary Data. Research & Practice for Persons with Severe Disabilities, 32 Koegel, Nefdt, Koegel, Bruinsma, & Fredeen (2006). A Screening, Training and Education. First S.T.E.P. In Koegel & Koegel (Eds.), Pivotal Response Treatments for Autism. Baltimore, MD, US: Paul H. Brookes Publishing. Koegel, L. K., Koegel, R. L., Nefdt, N., Fredeen, R., Klein, E. F., & Bruinsma, Y. E. M. (2005). First S.T.E.P: A model for the early identification of children with autism spectrum disorders. Journal of Positive Behavior Interventions, 7(4), 247-252.