David Celiberti - Picture ASAT website

David CelibertiPhD, BCBA-D

is the part time Executive Director of ASAT and Past-President, a role he served from 2006 and 2012. He is the Co-Editor of ASAT’s newsletter, Science in Autism Treatment

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He received his PhD in clinical psychology from Rutgers University in 1993. Dr. Celiberti has served on a number of advisory boards and special interest groups in the field of autism, applied behavior analysis, and early childhood education, and been an active participant in local fundraising initiatives to support after school programming for economically disadvantaged children. He works in private practice and provides consultation to public and private schools and agencies in underserved areas. He has authored several articles in professional journals and presents frequently at regional, national, and international conferences. In prior positions, Dr. Celiberti taught courses related to applied behavior analysis (ABA) at both the undergraduate and graduate levels, supervised individuals pursuing BCBA certifications, and conducted research in the areas of ABA, family intervention, and autism.



Zachary HoustonMS, BCBA

joined the ASAT board in August of 2014. He is a Program Director for Applied Behavior Analysis at Boston Public Schools and spends his days supporting and advocating for science in autism treatment for the students…

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He supports programming for the 700 students with Autism serviced by the district by training support staff, teachers, parents, and related service providers to implement scientifically validated interventions. Zachary has been a Behavior Analyst for 10 years and has served a variety of populations. His orientation throughout his career has been a focus on support system development in order to maintain quality evidence-based services for all people.


Leigh BroughanMA, BCBA
Vice President, Sibling Member

currently works for United Cerebral Palsy of Maine, providing consultation to children with autism in their Bridges Program and in local school districts…

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Leigh received her undergraduate degree in Special and Elementary Education from Providence College, followed by a Master’s degree in Applied Psychology at New York University and courses in behavior analysis at Penn State. In addition to her professional experience working with children with autism, she is a proud sister to a younger brother with autism.

Barbara Wells, DTR, SNS

re-joined the ASAT Board in 2017. Barbara is the parent of a young adult with autism. She is the Food Service Director for a public school district in New Jersey.


Leanne TadmanMADS, BCBA

is the past Editing Manager of ASAT’s newsletter, Science in Autism Treatment. As a former Extern, Leanne helped establish the role of Biomedical Advances Coordinator…

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In this role she focuses on what ASAT can do differently to better address biomedical advances (fads and evidence-based discoveries). In 2011, Leanne received her Masters in Applied Disability Studies, with a specialization in Applied Behaviour Analysis (ABA), from Brock University in Toronto, Ontario, Canada. She is committed to the practice of behaviour analysis, grounded in the best available scientific evidence. Leanne has over 12 years of clinical experience; this includes supervising and managing the delivery of government-funded Intensive Behaviour Intervention (IBI) therapy and community-based ABA services for children and youth with a diagnosis of autism. She also has over seven years of experience, teaching in the college setting. Leanne currently teaches courses related to ABA, and supervises student field placements at George Brown College in Toronto. Leanne also works as a curriculum writer and presenter for the Geneva Centre for Autism, Training Institute. She is the project lead and content developer for a Ministry of Education initiative: Online ABA course for Educators and Online Functional Behaviour Assessment (FBA) course for Educators.



Preeti Chojar, MCA,

has been a Board Member of ASAT since 2007 and currently serves as Co-Chair of the Website Committee. She is a software professional and, when her son was diagnosed, she had no knowledge of autism. She set about educating herself by attending numerous conferences, asking questions and reading as many books and articles as possible.

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She worked hand in hand with the team at her son’s preschool. She has used her software skills, innovative thinking and her commitment to her son to develop and carry out an unrelenting path forward for him. Her level of involvement and commitment to science-based treatment has sustained over the years.


Julie Azuma, BFA, 

joined the ASAT Board of Directors in 2016. She had a career as a designer and merchandiser in the apparel industry for 30 years. In 1995, when her older daughter, Miranda, was diagnosed with autism at the age of six, Julie left the apparel industry to begin a business marketing educational materials for children on the autism spectrum.

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Different Roads to Learning and DRL Books were created to meet the need for ABA products in the autism community. A pioneer in online business as well as autism education, Julie was able to source products that would help young students with language and shape their positive behavior. In 2011, the company was mentored by a partnership of UBS and the Clinton Economic Opportunity Initiative. The mentoring programs helped to create Apps for children on the autism spectrum. In the autism community, she was presented the Robert Ambrey Award from Eden II in 2007. The Elija Foundation honored her for her company’s work in autism with the “Chariot Award” in November of 2008. She has been honored with the Martin Luther King Jr.: “I Have a Dream Award” by Governor George Pataki. In 2015, she received the Clara Lemlich Award for lifelong social activism. In May of 2009-2015 she was chair of the Eden II and Genesis Foundation Board, an agency that works to educate and serve over 300 individuals diagnosed with autism. Julie is active in many Japanese American organizations from US Japan Council to local networks. She was elected to the Board of Governors at the Japanese American National Museum in 2015.


Daniela Fazzio, PhD,

joined ASAT’s board in 2011. Daniela is the Co-editor of ASAT’s newsletter, Science in Autism Treatment and Chairs of the Newsletter and Website Committee. She has been an international liaison for ASAT, having lived in Brazil, Canada, and now the US.

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She has a Master and a Doctoral degree in Behavior Analysis, from the Pontificia Universidade Catolica de Sao Paulo, Brazil and the University of Manitoba, Canada. She has been in the field since 1998 and has worked in leadership roles within agencies providing high quality behavioral intervention for individuals with autism spectrum disorder and conducted research published in peer review journals. She currently lives in San Francisco, CA and works as Senior Clinical Coordinator at Therapeutic Pathways and The Kendall Center.


Sabrina Freeman, PhD, 

is a Board Member of ASAT since 2011. She graduated from Stanford University in 1995 with a PhD in Sociology, specializing in small group research and the study of organizations. Upon return to Canada, Dr. Freeman spent 14 years advocating for the rights of children with autism to be included in the government funded health care system for autism treatment.

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Dr. Freeman created a 35-minute VHS/DVD Autism: Now What Do I Do? to help guide parents through setting up science-based treatment programs for their children. In 2002, she was awarded Queen Elizabeth’s 50th Golden Jubilee Medal for advocacy work done on behalf of children afflicted with autism. Dr. Freeman’s advocacy culminated in the now famous Supreme Court of Canada ruling Auton (Guardian ad litem of) vs. British Columbia in 2004. Dr. Freeman wrote several books on autism, translated into French, Italian, Norwegian and Polish. Her hope is that through her scholarship, thousands of parents will not have to go through the uncertain journey of generations of parents of newly diagnosed children. Dr. Freeman also writes a blog designed to help parents and professionals navigate through current issues in the area of autism. In addition, she currently teaches courses on research methods and organizations in the Department of Sociology at Western Washington University. Dr. Freeman is the parent of an adult daughter with autism.


Karen Fried, PsyD, BCBA-D, 

joined the ASAT Board of Directors in 2015 and is a member of the Scientific Review Committee. She is Director of Developmental Pediatric Services for the Advocate Health Care hospital system in Chicago. Originally from New York, Dr. Fried is a licensed clinical psychologist and board certified behavior analyst, with a background in school and community psychology.

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She holds a Doctorate of Psychology from Rutgers University. For the past 20 years, Dr. Fried has specialized in the diagnosis, education and treatment of children with ASD and other disorders impacting behavior, learning, socialization and communication. In prior positions, she led the start-up and management of ABA programs for children with ASD. Dr Fried serves on the Illinois Autism Task Force, an advisory body to the Secretary of the Illinois Department of Human Services. She is a member of the Illinois Psychological Association, American Psychological Association, Association for Behavior Analysis International, and Association of Professional Behavior Analysts.


Peggy Halliday, MEd, BCBA,

is a Board Member of ASAT, and serves as the JCH Director of School Consultation at the Virginia Institute of Autism (VIA) in Charlottesville, Virginia, where she has been a practitioner since 1998. Peggy oversees trainings for parents and professionals and provides consultation to public school divisions throughout Virginia.

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She also oversees BCBA and BCaBA training experiences. In addition to serving as a presenter at state and national conferences, including the Organization for Autism Research (OAR), Commonwealth Autism Service (CAS), and Association for Behavior Analysis International (ABAI) Peggy was selected as an autism expert for the “how-to” website monkeysee.com. Peggy has been on the board of ASAT since 2010 and serves on the Public Relations Committee.


Eric V. Larsson, PhD, LP, BCBA-D, 

is a Board Member of ASAT. He is the Executive Director of Clinical Services at the Lovaas Institute Midwest, where he implements and researches a program of intensive early intervention services for families of children who suffer from autism.

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Dr. Larsson is a member of the Clinical Faculty in the Psychology Department at the University of Minnesota, where he teaches classes in Applied Behavior Analysis and in Autism. He is currently a board member of the Behavior Analyst Certification Board and the Autism Recovery Foundation. He is the honorary President of the Fundaçion Planeta Imaginario in Barcelona, Spain. Dr. Larsson served as Associate Research Director of the NIMH Multi-site Replication Study of the UCLA Young Autism Project. He has supervised intensive early intervention services since 1983 and has consulted with over 250 programs and governmental agencies world-wide, particularly on the issues involved in insurance coverage of accountable ABA services. In Minnesota, he authored a law for Medicaid coverage of intensive early intervention for autism. He participated in the development of the Behavior Analyst Certification Board Guidelines for Health Plan Coverage of Applied Behavior Analysis Treatment for Autism Spectrum Disorder. In 2013 he received the Provider of the Year Award from Autism Speaks in Washington, DC. and the Jerry Shook Leadership Award from the California Association for Behavior Analysis (CalABA).


Franca Pastro, BA, 

has been a Board Member of ASAT since 2015. She produces the Perspectives column in SIAT, showcasing success stories of adults with ASD and supporting parents and the community at large by sharing the long-term benefits of evidence-based treatment in the lifespan of individuals affected by autism.

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Her involvement with ASAT began with commencement and subsequent completion of the Externship program. She is the parent of two children, including an adult daughter with autism, and she has been an active member of multiple organizations that support the dissemination of science-based treatments for autism.


Tristram Smith, PhD,

is a Board Member of ASAT since 2006 and past Chair of the Scientific Review Committee. He is the Haggerty-Friedman Professor of Developmental/Behavioral Pediatric Research at the University of Rochester Medical Center (URMC), where he leads federally funded studies comparing the efficacy of different interventions for children with autism spectrum disorder.

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He is also a clinician in URMC’s Community Consultation Program, serving students with ASD and other intellectual disabilities in schools and other agencies. His commitment to the study and treatment of children with ASD began in 1982, when he had the opportunity to volunteer as a buddy for an adult with autism who lived near his college. This experience inspired him to apply to graduate school at the University of California, Los Angeles, where he studied clinical psychology and worked as a therapist and researcher with O. Ivar Lovaas, PhD, in the UCLA Young Autism Project. Before moving to Rochester in 2000, he directed clinics for children with autism and their families in the states of California, Iowa, and Washington. He has authored or coauthored several of the most widely-cited studies on treatment outcomes for children with ASD.

Betsy Dyer - Picture ASAT website

Elizabeth Gibson Dyer, MA, CCC-SLP, 

has been a member of the ASAT Board of Directors since 2006. She is currently serving as co-treasurer and co-president of ASAT. She and her husband are the parents of three daughters, the middle of whom has Down syndrome. As a licensed and certified speech-language pathologist, she is dedicated to science-based interventions.

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Having been in practice since 1994, she is the owner of a business providing speech-language pathology, occupational therapy and educational consulting services in Maine. Her areas of primary interest include Down syndrome, autism and dual diagnosis, as well as intellectual disabilities. Betsy is also a special education director in Maine and holds certification as superintendent of schools. In her spare time she enjoys spending time with family and friends, ocean sailing, skiing, traveling and reading.


Sarah Treadaway, MEd, BCBA,

joined the ASAT Board of Directors in 2016 and currently serves as the Sponsorship Lead and Co-Chair of the Fundraising Committee. Prior to serving as a Board Member, Sarah served as ASAT’s Advertising Coordinator.

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Sarah received her Master’s degree in Developmental Psychology and Education from the University of Toronto, and completed courses in Behavior Analysis from the University of North Texas. Sarah has worked in the field of ABA and ASD for over 16 years in several capacities, including supervising an ABA program in a private school, serving as Senior Behavior Analyst for a government funded organization, overseeing IBI programs and conducting program reviews for various private IBI providers, coordinating and running a feeding clinic within a multi-disciplinary team, and consulting to educators and paraprofessionals in the public school system in Canada. She has also been an invited guest lecturer on various occasions, for a third year Undergraduate Psychology course at the University of Guelph. Currently, Sarah has been fulfilling the role of ABA Facilitator within the Upper Grand District School Board. Sarah has a strong passion for Applied Behavior Analysis and is committed to ensuring that individuals with ASD have access to evidence-based intervention options and accurate and sound information regarding treatments grounded in science.

 Joanna Dotts, DO,

joined the ASAT Board in March 2017. Joanna has worked as a Developmental Pediatrician at Eastern Maine Medical Center, Bangor, ME since 1988. Her focus is on Early Intervention, primarily working with children 0-4yrs of age, but also works with the Cleft Palate Team and Spina Bifida Team, seeing patients into young adulthood.

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Joanna completed her General Pediatric residency at Geisinger Medical Center in Danville, PA and Developmental Pediatrics Fellowship at A.I.DuPont Institute in Wilmington, DE. She is a fellow of the Academy of Pediatrics(FAAP) with specialty certification in General Pediatrics and subspecialty certification in Neuro-behavioral Pediatrics. Prior to moving to Maine in 1988, Joanna worked at Geisinger Medical Center (PA) and Miller Children’s Hospital/UC-Irvine in CA. Married to a hand surgeon and the mother of three 20-something children, Joanna has always found something to keep her busy. Advocacy for children though work, volunteering as a CASA guardian ad litum, and helping in church children’s programs has been a passion; hiking, reading, knitting, skiing, and enjoying “life as it should be” in ME keeps her grounded.

Ruth Donlin, MS, is a Board Member of ASAT since 2010 and on the Public Relations Committee. She is a consultant in private practice based in New York, and has provided consultation to schools, agencies, and home programs for children and adults on the autism spectrum for 20 years. She has completed the course requirements for a PhD in Clinical Psychology at Pacifica Graduate Institute and is completing her dissertation. She presents on a variety of topics such as managing challenging behaviors, using visual supports, team dynamics, and social skill development at conferences regionally, nationally, and internationally. Ruth is Past-President of the Autism Special Interest Group (SIG) of the Association of Behavior Analysis International.

Joseph Forgione, MBA, has served on the board of ASAT since 2002 when he joined to support a friend and founding board member who had children with autism. He holds a BA in political science and economics from Queens College and an MBA from Fordham University. He was a former financial services executive and Adjunct Assistant Professor of business at St. John’s Graduate School of Business having taught numerous courses and summer seminars to graduate business students. Over the last 20 years, he has worked with several non-profit organizations

Jay Gansen, MEd, BCBA, joined the Board of ASAT in 2018.

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