Autism: A Century of Discovery and Development

“By looking at the history of how ASD has been perceived and studied, it can be used to understand the source of biases and attitudes that individuals with ASD and their families endure by society. Often these perceptions are outdated, such as autism being caused by parents being neglectful, so condensing this information of disproven myths into its own webinar may be helpful in dispelling public misconceptions towards autism.”

— Helena Nguyen, Clinical Intern at The Johnson Center for Child Health and Development

This is a joint presentation with the World Autism Organization.

In this webinar:

1:00 – 12:00 – Organization and speaker introductions
13:00 – Early descriptions of autism
17:42 – Misconceptions and shifting paradigms
22:21 – Emergence of diverse research and advocacy
30:16 – Genetic and sensory insights, nutritional interventions
33:12 – Evolving diagnostic criteria and brain differences
41:00 – Biology, co-occurring conditions, and ABA certification
48:00 – Genetics, Neurology, and Comprehensive Lifespan Support
51:00 – Q&A

In this webinar, Dr. Stephen M. Edelson, Chief Science Officer for ARI, outlines historic milestones in autism research, understanding, and acceptance. He contextualizes pivotal studies and cultural references, highlighting their role in the evolution of autism understanding and acceptance. He summarizes nearly 100 years of autism research as follows:

Early descriptions of autism (1925-1940s)

The first documented study of autistic behaviors was published in 1925 by Ukranian researcher Grunya Sukhareva. Her pioneering work, though unrecognized for decades, laid the foundation for understanding diverse presentations of autism. Nearly 20 years later, Dr. Leo Kanner published a detailed description of 11 clinical cases instrumental in creating early diagnostic criteria. His work provided the first comprehensive description of autism and is still frequently cited today. A third contributor to early autism descriptions was Dr. Hans Asperger, whose work contributed to the recognition of “higher-functioning” presentations of autism (13:26).  

Misconceptions and shifting paradigms (1950s)

In the late 1950s, Bruno Bettelheim’s “refrigerator mother” theory falsely blamed parents for autism due to emotional neglect, causing immense guilt and hindering effective interventions. This harmful theory persisted until Dr. Bernard Rimland’s 1964 book Infantile Autism persuasively argued a biological basis for autism. His work asserts genetic, neurological, and environmental factors play a role in the development and presentation of autism. Rimland’s publication was a pivotal turning point in autism research as it successfully challenged prevailing psychological theories and redirected the discourse to the biomedical track. In 1967, Dr. Rimland founded the Autism Research Institute (ARI), creating a platform for funding and promoting biomedical research. Rimland also co-produced a documentary called “The Invisible Wall” to raise awareness (17:42).

Emergence of diverse research and advocacy (1960s)

The 1960s saw the emergence of multi-disciplinary investigations, with UCLA researchers like Edward Ritvo breaking into the medical aspects of autism, which marked the beginning of pharmacological research. Simultaneously, Ivar Lovaas was pioneering behavior therapy, which later developed into applied behavior analysis (ABA). Victor Lotter conducted the first prevalence surveys, estimating 4.5 in 10,000, providing a baseline for epidemiological studies. Cognitive theories from Uta Frith, Neil O’Connor, and Bette Hermelin emerged to explain distinct processing styles, laying the groundwork for our modern understanding of sensory differences in the autistic experience.

 During this time, diagnostic efforts also evolved, as Eleanor Mildred Creak’s British Working Group developed a nine-point diagnostic criteria in 1961. This was quickly followed by Lorna Wing’s “Triad of Impairment, which became a highly influential model for conceptualizing autism and directly impacted diagnostic manuals like the DSM and ICD. Parent advocacy also gained momentum, as Drs. Ruth Sullivan and Rimland established the National Society for Autistic Children (later Autism Society) in the U.S. and Helen Allison created its counterpart in the UK to empower parents and provide crucial support (22:21).

Genetic and Sensory Insights, Nutritional Interventions (1970s)

The 1970s brought significant insights, with Susan Folstein and Michael Rutter’s landmark twin study providing the first empirical data supporting a genetic component to autism, thus solidifying its biological basis. Concurrently, Jean Ayres pioneered sensory integration work, drawing attention to sensory processing differences and influencing occupational therapy interventions. Dr.  Rimland also explored the role of nutritional supplements like vitamin B6 and magnesium based on anecdotal reports from parents, highlighting the potential for biomedical interventions and individualized treatment approaches (30:26).

Evolving Diagnostic Criteria and Brain Differences (1980s)

In 1980, the DSM-III (1980) established “infantile autism” as a distinct category, which was a crucial step in formalizing the diagnosis. The 1980s also saw foundational neurobiological discoveries, as Margaret Bauman and Thomas Kemper documented the first evidence of neurological differences in the brain tissue of an individual with autism; thus validating its biological underpinnings (33:12). 

 Ivar Lovaas’s “The Me Book” democratized access to behavioral intervention strategies, and his recovery study, though controversial, fueled optimism and investment in early intensive behavioral interventions. This decade also saw public awareness surge as Temple Grandin’s autobiographical works offered unique insights into the autistic experience and challenged common stereotypes. The movie Rain Man also significantly increased public awareness, though in some cases it presents a limited view of autistic capabilities (37:06). 

Biology, co-occurring conditions, and ABA certification (1990s)

The 1990s saw a strong emphasis on the underlying biology of autism. The Defeat Autism Now (DAN!) movement brought co-occurring medical conditions, such as immune and gastrointestinal issues, into the limelight, advocating for their recognition and treatment as integral aspects of autism. Concurrently, Cure Autism Now (CAN) was established to fund biological treatments and prevention and find a cure for autism; this organization merged with Autism Speaks in 2005 and is currently the largest entity focused on autism awareness and support. Beyond medical interventions, various groups, including Families for Early Autism Treatment (FEAT), were established to support and advocate for early interventions. FEAT published the first autism e-newsletter, expanding information dissemination across the community. The Behavior Analyst Certification Board (BACB) was also created in the 90s. The BACB standardized the certification process for individuals offering Applied Behavior Analysis (ABA) (41:00).

Genetics, Neurology, and Comprehensive Lifespan Support (The 2000s – Now)

Profound advancements across several domains have characterized the period from the 2000s to now. Genetics research has exploded, moving beyond fundamental DNA analysis to include exome sequencing and epigenetics, with findings suggesting environmental factors like proximity to pesticides might increase autism likelihood. In neurology, increased focus on brain tissues, brainwave activity, advanced imaging, and neurotransmitters has deepened our understanding of the autistic brain. Recognition of co-occurring medical conditions has also expanded to include gastrointestinal problems, immune dysregulation, metabolic disorders, sleep disturbances, anxiety, depression, and more. Models like the Early Start Denver Model and functional communication training have gained significant traction and support in behavioral intervention methods. Dr. Edelson notes a need for more attention on pivotal response training. 

Dr. Edelson explains how the adult autism field has gained traction over the last decade or so. Issues like housing, employment, recreation, and persistent medical issues must be addressed in this population. This growing focus on senior issues emphasizes the need for nursing staff and group homes to understand autistic behaviors, sensory differences, and anxieties in older adults to provide appropriate care (48:00).