In Loving Memory of Allison Marshall

Not every extraordinary life is lived in the spotlight. Some unfold with quiet strength—shaped by determination, advocacy, and the kind of love that moves mountains. This three-part tribute shares the story of Allison Marshall, a young woman from British Columbia whose life was defined by resilience, joy, and the unwavering devotion of her mother, Beverley Sharpe. Diagnosed with autism at a young age, Allison faced many challenges, yet she embraced life fully with a love for sparkly shoes and creating handmade soaps, and a generous spirit that embraced every opportunity that came her way.

A few short months ago, Allison was hospitalized with a sudden illness. Her passing was a profound loss to all who knew her, but her legacy continues to ripple outward in the lives she touched, the lessons she taught, and the love she gave so freely. Through the reflections below, we come to know Allison not only as an individual with autism who overcame adversity, but as someone who contributed meaningfully to her family, church, and community and brought value into the world. We also come to know Beverley, a mother whose fierce advocacy and commitment to science-based care helped her daughter thrive, and whose impact continues to inspire families and professionals across the autism community. We have been deeply blessed to have Beverley serve as a member of our Board of Directors—her commitment to science-based intervention, compassion, and lived experience have enriched our mission in immeasurable ways.

In the spirit of Thanksgiving, recently celebrated in Canada and soon to be observed in the United States, we honor Allison’s memory with tremendous gratitude and celebrate the enduring legacy she shares with her mother. Beverley’s tireless efforts ensured Allison had access to high-quality, evidence-based services—support that empowered her to live a full and meaningful life. We thank Allison for doing just that, and for showing us the profound impact of sacrifice, science, and compassion. –Dr. David Celiberti, Executive Director

Sabrina Freeman, PhD
Member of the Professional Advisory Board

When I think of Allison, I think of one of the greatest stories of devotion I’ve ever witnessed.

Bev didn’t just raise her daughter—she championed her, fought for her, and moved mountains to make sure Allison had every opportunity to become the remarkable young woman she was meant to be. Over the 25+ years I’ve known Bev, I’ve watched her pour her heart, her time, and her energy—often at great personal cost—into making sure Allison could thrive. And thrive she did.

Allison was born with autism, but that never defined her limits—it simply meant she and Bev were going to work harder, together, to unlock her potential. With Bev’s tireless support, and the help of others who cared deeply, Allison developed an incredible set of skills that allowed her to participate fully in her community.

She didn’t just participate—she contributed. She gave her time to the food bank, to the animal shelter—places where she could help others and be part of something truly meaningful. She approached her responsibilities with a sense of pride, consistency, and reliability that put many of us to shame.

And she had this creative side, too. Every Christmas, Allison would handcraft colorful soaps for gifts. My daughter still remembers how each one was carefully made in shades of pink—the color Allison knew we loved. They weren’t just soaps—they were little works of art, infused with thoughtfulness and attention to detail.

In her 31 short years, Allison built a life that mattered. She brought beauty, kindness, and diligence to the world. And none of that would have been possible without Bev’s extraordinary devotion. Their lives were so intertwined that I can’t think of one without thinking of the other.

When I remember Allison, I’ll picture her smiling in the places she loved, confident in her work, and surrounded by people who valued her. And I’ll remember the incredible journey she and Bev shared—a journey of perseverance, love, and possibility.

Allison’s life reminds us that with enough support, patience, and love, a person can truly become the best version of themselves. And Bev’s love reminds us just how powerful a mother’s heart can be. May Allison’s memory be a blessing.

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David Celiberti, PhD, BCBA-D
ASAT Executive Director

I never met Allison in person. I wish I had.

But through her mother Beverley’s words, I came to know a young woman whose life was shaped by courage, love, and quiet triumphs. Diagnosed with autism before the age of three, Allison’s journey was anything but easy. Yet she grew into someone who embraced life, made an impact, and loved sparkly shoes, bath bombs, butterfly nail stickers, and shopping. Miss Allison Marshall didn’t just play hard—she also worked hard. As a small child receiving early intensive behavioral intervention, she was a diligent learner who overcame so much. She showed up, she learned how to learn, she used her voice, and she became her own person.

Through Beverley’s commitment to evidence-based intervention, Allison became a lifelong learner, taking in a multitude of new experiences, thriving in them, and leaving her mark.

As a young adult, she worked with pride and purpose (and earned a paycheck)—folding clothes at Old Navy and stocking shelves at Quest Food Exchange—where she was well-liked and appreciated. She cared for many animals who needed a little extra TLC, often round the clock, and she gave that love freely and abundantly.

Through Allison’s kind and generous heart, I came to know her more deeply. Over the years, I was fortunate to receive numerous care packages with handmade soaps, small, polished rocks inscribed with messages, and cards from Allison and her mom. The final package arrived just weeks before she passed away. I especially loved how she signed her name on the inside of my card: beginning with modest letters that grew taller by the end, as if her spirit was rising with each stroke.

Allison’s journey was more than about personal growth, it was a testament to the power of unwavering advocacy and unconditional love. Her mom fought for her with everything she had, and Allison responded with resilience, grace, and a smile that lit up the world. Together, they carved out a life rich in meaning and connection—full of the things that truly matter.

She was a foodie, a fashionista, a greeter at her church, a nature lover, a volunteer, an animal caretaker, a friend, a sister, and a daughter. She was cherished by many, near and far. And though I never met her in person, I feel the profound loss of a soul whose spirit touched countless lives and whose journey reminds us all of what it means to live with purpose and heart.

Here’s to a life well lived. Thank you, Allison, for letting us all get a glimpse of what made it extraordinary.  Rest in peace. You mattered. You always will.

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Ruth Donlin, MS
ASAT Board President

I vividly remember meeting Beverley for the first time when she joined the Board of Directors of the Association for Science in Autism Treatment (ASAT). From the very beginning, I was struck by her remarkable story—the incredible sacrifices she made as a single mother, her passion for learning, and her unwavering determination to help her daughter, Allison.

Like many parents, Beverley was confronted with a confusing and overwhelming landscape of autism treatments, many of which were based on unsubstantiated claims rather than science. Her journey took a transformative turn when a fellow parent (and eventually a fellow ASAT board member) introduced her to Applied Behavior Analysis (ABA) and its foundation in research and evidence. This discovery in 1985 profoundly changed the course of Allison’s life.

With ABA, Allison began to flourish. Beverley remained steadfast in her advocacy, carefully protecting her daughter’s time and energy from being spent on interventions that lacked scientific support. She was motivated not only by her role as a mother but also by a growing commitment to help other families find the same hope and progress. Beverley’s tireless dedication became both a source of strength for Allison and an inspiration for the broader autism community.

Allison, in turn, grew into a remarkable young woman. She poured her energy into caring for animals, contributing through volunteer service, and engaging in meaningful work within her community. She lived with purpose, kindness, and connection, forging bonds with those who came to cherish her. Many of us were touched by her generosity in small but powerful ways—like the handmade soaps and cards she created and shared with such care.

Her life is a profound reflection of Beverley’s vision, determination, and love. Together, they built a life rich in growth, service, and meaning. Allison’s accomplishments serve as both a validation of science-based treatment and a shining example of what becomes possible through unconditional love and steadfast advocacy.

Beverley has now served on ASAT’s Board of Directors for seven years, taking on several roles, including her heartfelt work thanking countless authors who contribute to our monthly newsletter, Science in Autism Treatment. She has an extraordinary gift for expressing appreciation and for weaving her family’s lived experiences into reflections on the power of evidence-based care. Many authors have shared how deeply moved they were by Beverley’s insights and perspective.

Allison’s journey is not just a story of personal growth—it is a reminder of what truly matters: love, perseverance, community, and joy in everyday moments. Beverley fought tirelessly for her daughter, and Allison responded with courage, grace, and a light that touched all who knew her. Their shared story illustrates the transformative power of science, advocacy, and love.

We honor Allison’s memory with gratitude and admiration, and we celebrate the enduring legacy of both mother and daughter.