A point-by-point response to the DMI founders’ letter to the editor (PPT) — and the commercial fiction it attempts to defend.
The (LTTE) response from DMI’s cofounders is a masterclass in motivated reasoning, ad hominem deflection, commercial self-promotion, and outright misrepresentation. It attacks the expertise of world leading pediatric physical therapy researchers rather than addressing the damning fact that Dynamic Movement Intervention — five-plus years after its 2021 launch — has zero published peer-reviewed evidence of efficacy beyond one confounded conference abstract.
The letter’s central claim — that DMI “differs significantly from CME and Neurodevelopmental Treatment in both its structure and scientific rationale” — is demonstrably false and contradicted by the founders’ own words.
“In short, they both use similar exercises, though DMI has added tweaks…”
“DMI is an evolution of CME… created to bridge the gaps of the CME program.”
The letter’s insistence on distinction is a marketing fiction designed to escape CME’s 50-year evidence drought. It fails.
The letter demands that critics must complete DMI courses, communicate directly with founders, observe sessions, and undergo “direct review by trained DMI practitioners” before commenting. This is circular nonsense and an admission that DMI cannot withstand external scrutiny.
“Science evaluates claims and data, not insider credentials. Requiring proprietary training to critique a method is the hallmark of pseudoscience.”
Ginny Paleg, Diane Damiano (past president, AACPDM), Roslyn Livingstone, David Frumberg et al. — among the most respected figures in pediatric neurorehabilitation with hundreds of high-impact papers.
No peer-reviewed publications demonstrating DMI efficacy. Their “expertise” is commercial — they sell the $800 courses and global certification empire.
One conference abstract describing two children with spinal muscular atrophy type 1 who received DMI after gene replacement therapy. Gains are confounded by the disease-modifying treatment. No controls, no blinding, no comparison group. Sackett Level 5.
“To date, there is no published research on DMI.”
“We are only 2 years old and that is why there isn’t any research.” “Evidence-based practice is often very very, very behind…”
No prospectively registered clinical trials on DMI existed. A single registered trial (DMI vs. Bobath) has produced no published results.
The letter’s “research is in planning phase” and “initiatives are underway” is marketing cope five years after launch. Insurance “coverage” exists only because DMI is billed as generic PT/OT — not because any payer validated the method. Families pay $2,500–$5,000+ per week out-of-pocket.
The letter cites Kleim & Jones on experience-dependent plasticity and claims alignment with ICF, dynamic systems theory, and task-specific training. The actual DMI manual and practice contradict this.
This is classic mid-20th-century NDT/CME hierarchical facilitation — therapist-driven, not child-led. Modern motor learning (Novak traffic lights, task-specific training, dynamic systems) emphasizes active, meaningful, child-initiated practice with high repetition in functional contexts. “Splinter skills” practiced in unsupported positions do not reliably transfer. The literature the letter cites actually supports the opposite.
The letter claims “no evidence to suggest that DMI carries a higher risk profile.” Correct — because there is no published safety data at all. Children with cerebral palsy and osteopenia are fracture-prone; intensive unsupported handling carries real risk. Therapists are legally obligated to report suspected injuries.
$800 per 16-hour course. 3,300+ therapists trained in 61 countries. The letter’s wounded tone about “threatens funding grants” is projection: promoting unproven therapies undermines the entire field’s credibility with payers and governments.
The DMI co-creators have elevated an uncredentialed DMI practitioner as a leading voice — while attacking world-renowned experts for “lack of expertise.” This is hypocrisy, plain and simple.
The Hypocrisy Is Stark.
The same letter that demands “subject expertise” and proprietary DMI training before anyone may criticize DMI simultaneously elevates a PhD candidate with few publications, no independent research record, and a clear commercial stake in DMI as a credible counter-authority. This is not how science works. It is how marketing works.
“DMI, introduced in 2021, has no published empirical evidence beyond a single conference abstract. Thus, both interventions remain at Sackett Level 5 — no evidence.”
Families deserve informed consent about the evidence vacuum — not glossy Instagram testimonials and expensive intensives.
The evidence — or rather, its complete absence — demands it.