Jen Lumanlan — Sensory processing disorder

In one sentence

Sensory processing difficulties are real, but because the research lacks reliable diagnostic standards and high-quality evidence for specific treatments, parents must approach therapy as a self-directed scientific study rather than an established medical certainty.

Why read this (and who it's for)

This summary is for parents of children who exhibit "sensory" behaviors—such as extreme reactions to textures, lights, or sounds—and who are feeling overwhelmed by the conflicting information regarding Sensory Processing Disorder (SPD). It solves the problem of "analysis paralysis" by providing a critical, evidence-based framework for evaluating occupational therapy. You will be able to navigate conversations with specialists, set measurable goals for your child's progress, and decide whether a specific treatment is actually working for your family.

The big idea

Jen Lumanlan argues that while children undeniably experience difficulties processing sensory information, the field of Sensory Processing Disorder (SPD) suffers from a significant "research gap." Much of the current understanding is built on theories from the 1960s and 70s that lack modern, peer-reviewed validation. Because the diagnostic criteria are inconsistent and the studies on treatments (like sensory integration therapy) often feature tiny sample sizes and lack proper control groups, we cannot say with certainty that specific therapies "cure" the underlying disorder.

The logic is this: the experience of the child is real (the child is bothered by tags, sirens, or textures), but the medical label and the prescribed treatment are not yet backed by rigorous science. Therefore, parents should not rely on a therapist's "authority" alone. Instead, you must become the lead researcher of your own child's development, using data-driven goals to determine if a therapy is actually providing a meaningful benefit to your child's life.

Key ideas

The Sensory Processing Machine

• What it is — Until about age seven, children are primarily "sensory processing machines." They sense and respond to the world without many abstract thoughts.
• Why it matters — If sensory-motor processes are well-organized in these early years, it creates the foundation for all later mental and social skills.
• In the book — Lumanlan cites Dr. A. Jean Ayers, who argues that the brain must organize sensations (eyes, nose, skin, muscles) to allow a child to behave in a productive way, such as peeling and eating an orange.

The Three Patterns of Dysfunction

• What it is — Dr. Lucy Jane Miller categorizes sensory issues into three main patterns: Sensory Over-responsivity (reacting too intensely), Sensory Under-responsivity (appearing apathetic or lacking drive), and Sensory Seeking (craving unusual input like spinning or loud noises).
• Why it matters — Understanding these patterns helps parents identify why a child might be acting out (e.g., a child "seeking" input might be mistaken for having ADHD).
• In the book — Lumanlan notes that "sensory seeking" can be confused with or co-occur with ADHD, and "under-responsivity" can lead to a child being labeled as "lazy" when they actually lack the internal drive to socialize.

The Diagnostic "Gray Zone"

• What it is — SPD is currently not included in the DSM-5 (the standard manual for psychological diagnoses).
• Why it matters — Because it isn't a standard diagnosis, there is no "gold standard" for testing. Many tests, like the Sensory Integration and Praxis Test, have been found to produce unreliable results.
• In the book — Lumanlan highlights that the American Academy of Pediatrics states it remains unclear if these difficulties are a "disorder of the sensory pathways" or simply behavioral differences associated with Autism or ADHD.

The Problem of "Small Sample" Research

• What it is — Much of the research supporting sensory integration therapy is flawed because it uses "convenience sampling" (small, non-representative groups) and lacks proper control groups.
• Why it matters — If a study only has five participants, we cannot know if the child improved because of the therapy or because of the attention they received from the therapist.
• In the book — Lumanlan points out that one study on the "Wilbarger protocol" (brushing) only had five participants, and the researcher included the mother's data even though her child refused the treatment after two weeks.

The "Attention" Variable

• What it is — A major critique of sensory integration therapy is that it may be difficult to distinguish between the therapy and the attention the child receives.
• Why it matters — If a child improves because they enjoy "skipping school to go to therapy" or because of one-on-one interaction, the specific sensory "integration" might not be the cause of the change.
• In the book — Lumanlan cites a critique from Controversial Therapies for Autism and Intellectual Disabilities, noting that practitioners often promise "vague benefits" that are difficult to test.

Frameworks & tools

The "Parent-as-Researcher" Protocol

Because the science of SPD is currently insufficient to provide a "guaranteed" cure, Lumanlan suggests parents adopt this scientific framework when starting any sensory therapy:

1. Identify a Specific Behavior: Choose a measurable behavior (e.g., "the number of times the child gets up out of their seat during story time").
2. Establish a Baseline: Have a teacher or parent count the occurrences of that behavior for one week before starting treatment.
3. Set a Timeline: Agree with the therapist on a specific timeframe (e.g., 4 weeks) to observe changes.
4. Measure and Compare: Count the occurrences of the behavior during the treatment period.
5. Evaluate Meaningful Progress: Determine if the change is significant for your family's life, not just "clinically interesting" (like involuntary eye movements).

Memorable examples & stories

The "Crazy Parent" Success Story

Jess, a mother, spent six months as a "crazy parent" advocating for her daughter, who was initially only diagnosed with a physical issue from a birth stroke. It took her persistence and the support of her mother (a physical therapist) to get her daughter evaluated for SPD. Lesson: Parents must be your child's fiercest advocate, as some diagnoses may be missed by a standard medical team.

The "Orange" Analogy

Dr. Ayers uses the example of a child needing to coordinate their eyes, nose, mouth, skin, and muscles to peel and eat an orange. Lesson: Sensory integration is the fundamental organization of the senses required for everyday, purposeful goals.

The "Geosyncline" Parallel

Lumanlan compares the study of SPD to the study of how mountains are formed. Just as we know mountains exist but are still refining the theories of how they formed (plate tectonics vs. older theories), we know sensory issues exist but are still refining the "how" and "why" of the brain's organization. Lesson: A lack of current scientific clarity doesn't mean the problem isn't real; it just means our "map" of the brain's mechanics is still being drawn.

Key quotes

"The brain is designed to give itself the experiences that are necessary for its own development and the therapist's job is to provide the right kind of activity so the child gets the right kind of experience." Why it matters: This frames the therapist's role as a guide for the child's internal development, not a "fixer" of a broken machine.

"The rest of the research... is a pretty big problem when you're trying to diagnose this." (Paraphrased) Why it matters: Lumanlan emphasizes that the lack of reliable, reproducible testing makes a definitive diagnosis of SPD nearly impossible.

"If some aspect of the treatment has produced benefits for the child then individual parents may not care why... but it would be a lot faster and cheaper to implement an intervention that involves playing with your child one-on-one for an hour rather than diagnosing a disorder." Why it matters: This is a sobering reminder to evaluate the "cost-benefit" of complex therapies versus simple, high-quality human interaction.

How to apply it

This week

• Audit the "Sensory" labels: Look at your child's behaviors. Are they "sensory" (e.g., reacting to a tag) or are they "behavioral" (e.g., seeking attention or expressing frustration)?
• Identify one "Meaningful" metric: If your child struggles with a specific activity (like brushing teeth or sitting at a table), decide what a "success" looks like in numbers (e.g., "stays seated for 3 minutes").

Ongoing

• The "Scientific Study" Rule: If you start occupational therapy, do not accept "vague" promises of improvement. Ask the therapist: "How will we measure progress, and what is the specific timeline for seeing a change in [Specific Behavior]?"
• The "Meaningful" Filter: Before committing to a new therapy (like brushing or weighted vests), ask: "Is this changing our daily life, or is it just a clinical exercise?"

Common pitfalls

• The "Expert" Trap: Assuming that because a therapist is an expert, their recommended treatment is automatically backed by high-quality, peer-reviewed evidence. (Lumanlan warns that the research is often "critically flawed.")
• The "Diet" Distraction: Many parents fall into the trap of trying to "fix" SPD with specific diets. Lumanlan notes there is "zero evidence whatsoever" in peer-reviewed research linking diet to the cause of SPD.
• Over-identifying with "Sensory" labels: Confusing a "Highly Sensitive" child (a personality trait) with a child who has a "Sensory Processing Disorder" (a neurological processing issue).

Connects to

• The Highly Sensitive Child by Dr. Elaine Aron: Provides a distinction between being a "Highly Sensitive Person" (HSP) and having a sensory processing disorder.
• The Theory of Plate Tectonics: Used as a metaphor for how scientific understanding evolves—we know the "mountains" (the symptoms) exist, but we are still refining the "tectonics" (the underlying neurological mechanisms).

If you remember only three things

• Symptoms are real, but the "Disorder" is poorly defined: Children clearly struggle with sensory input, but the medical category of "SPD" lacks a standardized, reliable diagnostic test.
• Research is often flawed: Many popular treatments for SPD are based on tiny sample sizes and lack proper control groups, making it hard to prove the treatment actually caused the improvement.
• Be the Lead Researcher: If you pursue therapy, treat it as a scientific study. Set clear, measurable goals and a timeline to ensure the treatment is actually working for your child.

Internalize it

• Reflection questions
  • If I stop the "specialist" labels for a moment, what is the actual daily struggle my child is facing?
  • What is one specific, measurable behavior (not a feeling) that I want to see improve in my child?
  • Am I choosing a therapy because of the "hype" of the community, or because I have a clear plan to measure its success?
• Flashcards Q: What is the primary difference between "Sensory Seeking" and ADHD? A: Sensory seeking is a craving for specific types of input (like spinning), which can co-occur with or be confused with ADHD. Q: Why is it difficult to diagnose SPD using current standards? A: It is not in the DSM-5, and many of the tests used to measure it (like the Sensory Integration and Praxis Test) have been found to be unreliable. Q: What is the "Attention" variable in sensory therapy? A: It is the possibility that a child improves because of the one-on-one attention they receive from a therapist rather than the specific sensory integration techniques used. Q: What does Lumanlan suggest parents do if they choose to pursue sensory therapy? A: Approach it like a scientific study: set a specific, measurable goal, establish a baseline, and set a timeline for progress. Q: Is there evidence that diet causes or worsens SPD? A: No, there is "zero evidence whatsoever" in peer-reviewed research or the primary texts of the founders of the field.

Fidelity note

This summary is based entirely on the transcript provided. I am highly confident in the distinction Lumanlan makes between the reality of sensory symptoms and the uncertainty of the medical diagnosis/treatment. I have maintained her skeptical tone regarding the "prevalence" numbers and the "small sample sizes" of the studies cited. The "Parent-as-Researcher" framework is a synthesis of her practical advice for parents navigating the lack of clear-cut medical guidelines.