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MN-PELSB-004 · Minnesota PELSB Renewal Course Series

Key Warning Signs of Early-Onset Mental Illness in Children and Adolescents

Teacher Notes and Study Guide · iTeachAI Academy
Clock hours3 clock hours / 180 active minutes
Mandatory areaKey Warning Signs for Early-Onset Mental Illness
FormatSelf-paced online professional learning
This study guide is a review companion drawn verbatim from the course. Course completion requires the full lessons, activities, and assessment.

Module 1 · Warning signs and the educator role

22 required minutes

Lesson 1.110 required minutes

Recognize, respond, refer, record: the educator's role in early identification

Foundation for all seven PELSB sub-criteria

Learning objectiveState the educator's role boundary in student mental health, cite the scale of early-onset mental illness, and map the school mental health referral pathway.

Key teaching points

Applied activity

Map your building's actual referral pathway. Name the role (not the student) for: first point of contact for a developing concern, the team that reviews referrals, the person who leads the crisis protocol, and the after-hours guidance families receive. If you cannot name one of these, write down exactly who you will ask this week. The finished artifact has two parts. Part one is the pathway map itself: the four roles above plus the backup person for each, the physical or digital location of the referral form, and the expected response window for a routine referral in your building. Part two is a four-sentence referral script for a fictional student using the baseline, change, actions-taken, request structure from this lesson, written in observable language a counselor could act on without asking a single clarifying question.

Primary sources: S1 · S2 · S6 · S7 · S12 · S14 · S32

Lesson 1.212 required minutes

Developmental warning signs: what changes, for how long, and how much it interferes

Foundation: key warning signs across development

Learning objectiveDistinguish ordinary developmental variation from warning signs of anxiety, depression, psychosis risk, eating disorders, and attention-related concerns using duration, intensity, interference, and change from baseline.

Key teaching points

Applied activity

Design a one-page warning-sign observation log you could actually use: columns for date, setting, observable behavior, duration/frequency, and action taken. Then write two example entries about a fictional student, one that uses correct observable language and one that deliberately shows the interpretive language you must avoid, with the fix. Build the log as a real table with at least five columns, then write six entries in total: for each of three domains from this lesson (choose from anxiety, depression, attention, eating, psychosis risk), one interpretive entry that names what makes it interpretive and one corrected observable entry capturing the same event. Close with a two-sentence personal rule for where your log lives, who may see it, and how it reaches the referral team rather than sitting in a private file.

Primary sources: S6 · S7 · S14 · S15 · S16 · S17 · S18 · S19 · S21

Module 2 · Trauma and its classroom presentation

25 required minutes · PELSB sub-criterion 1: mental illness trauma

Lesson 2.112 required minutes

Trauma and adverse childhood experiences: what they are and how they walk into class

PELSB: mental illness trauma

Learning objectiveDescribe how trauma and adverse childhood experiences present in the classroom at different developmental stages and distinguish trauma responses from willful misbehavior.

Key teaching points

Applied activity

Take a behavior incident you have witnessed or a realistic invented one (de-identified). Write two readings of it: the discipline-first reading and the trauma-informed reading. For the second, identify the possible trigger, the survival response you observed (fight, flight, or freeze), and the educator move that would have reduced threat while keeping expectations intact. Your artifact must include: the antecedent, behavior, and recovery time for the incident in observable language; the two readings written as full paragraphs of at least four sentences each; one sentence naming the least intrusive environmental change that would have removed the trigger; and one model documentation entry you would actually file, checked against the documenting-versus-interpreting standard from Lesson 1.2.

Primary sources: S6 · S10 · S28 · S29 · S30

Lesson 2.213 required minutes

Trauma-informed classroom practice without becoming a therapist

PELSB: mental illness trauma

Learning objectiveApply trauma-informed principles of safety, predictability, connection, and regulation in ordinary instruction while maintaining role boundaries and attending to educator self-care.

Key teaching points

Applied activity

Choose three concrete changes to your own practice, one for predictability, one for connection, and one for regulation. Describe exactly what you will do, when it starts, and how you will know within a month whether it is helping. Add one sentence naming your own early sign of secondary stress and the support you will use. For each of the three changes, specify the observable indicator you will track (what a colleague would see or count) and the date you will review it. Add one consultation question you could bring to your school mental health team this month, phrased so it requests practice guidance rather than clinical information about any student.

Primary sources: S10 · S12 · S28 · S30 · S36

Module 3 · Accommodations and family partnership

25 required minutes · PELSB sub-criteria 2 and 3

Lesson 3.113 required minutes

Accommodating students' mental health in daily instruction

PELSB: accommodation for students' mental health

Learning objectiveSelect classroom accommodations matched to anxiety, depression, trauma, and attention-related needs that preserve learning targets, and locate the boundary between teacher flexibility and formal team decisions.

Key teaching points

Applied activity

Write two de-identified scenarios from your own context: one student showing anxiety-pattern signs and one showing depression- or trauma-pattern signs. For each, propose two accommodations, state the learning target each preserves, and mark each decision as "teacher flexibility" or "bring to team," with one sentence of justification. Extend the artifact: for each accommodation, add one sentence naming the mechanism it relieves (what the change does for the student, not just what it changes), and state the uptake evidence you would record over two weeks to judge whether it is helping. Finish with one accommodation you have seen quietly drift into a modification and how you would repair that drift through the team.

Primary sources: S2 · S5 · S6 · S12 · S14 · S21

Lesson 3.212 required minutes

Parents and guardians: first partners in a student's mental health

PELSB: parents' or guardians' roles in addressing student mental illness

Learning objectivePlan a respectful, culturally humble conversation with a parent or guardian about observed warning signs that positions the family as decision-making partners and connects them to resources.

Key teaching points

Applied activity

Using one of your Lesson 3.1 scenarios, script the first five minutes of a parent or guardian conversation: your strengths opening, two observation statements in observable language, two listening questions, and your pathway offer. Then note one cultural-humility adjustment you would make if the family's background or prior school experience differed from your own assumptions. Then extend the script through one hard reply: choose the response you most expect in your context (dismissal, anger at the school, or a privacy preference), write the family's line, and write your two-sentence reply that preserves both the relationship and the pathway. Close by naming the follow-up interval you committed to and how you will document the conversation.

Primary sources: S5 · S6 · S11 · S12 · S20

Module 4 · Fetal Alcohol Spectrum Disorders and Autism Spectrum Disorder

25 required minutes · PELSB sub-criteria 4 and 5

Lesson 4.113 required minutes

Fetal Alcohol Spectrum Disorders: brain-based, lifelong, and frequently invisible

PELSB: Fetal Alcohol Spectrum Disorders

Learning objectiveDescribe the range and classroom-relevant characteristics of FASD and select strategies that fit a brain-based, "cannot yet" rather than "will not" interpretation of behavior.

Key teaching points

Applied activity

Take one multi-step routine or task from your own teaching. Redesign it for a student with an FASD profile: rewrite the instructions in short concrete steps, design the external memory support (card, checklist, or visual), and state how you will respond the third time the student forgets a step in one week, in a way consistent with "cannot yet." Add a conditions-of-success documentation pair for your redesigned task: one entry recording performance with the support in place and one without, both in observable language. Then write the one-sentence version of the "cannot yet" reframe you would offer a frustrated colleague who says the student "just doesn't care."

Primary sources: S8 · S9 · S22 · S23

Lesson 4.212 required minutes

Autism Spectrum Disorder: characteristics, strengths, and classroom supports

PELSB: Autism Spectrum Disorder

Learning objectiveDescribe core characteristics of ASD, distinguish autistic traits from mental illness while recognizing common co-occurring conditions, and match supports to communication, predictability, and sensory needs.

Key teaching points

Applied activity

Audit one of your lessons through an autistic student's experience: identify one implicit social demand, one idiom or nonliteral instruction, and one sensory load point. Redesign each. Then write two baseline-change observations that would make you refer an autistic student for possible co-occurring anxiety or depression. Add two entries to the artifact: the exact five-words-or-fewer instruction you would use with an overwhelmed student in your setting, and one family-report scenario (after-school collapse with intact school behavior) with the response you would give the family that treats their observation as data.

Primary sources: S6 · S13 · S24 · S25 · S26

Module 5 · De-escalation and Minn. Stat. 125A.0942

25 required minutes · PELSB sub-criteria 6 and 7

Lesson 5.112 required minutes

Evidence-based de-escalation: match the adult move to the phase

PELSB: de-escalation methods

Learning objectiveDescribe the escalation cycle and apply phase-matched de-escalation techniques that reduce threat, preserve dignity, and prevent the emergencies in which restrictive procedures become legally possible.

Key teaching points

Applied activity

Write your personal de-escalation script: the exact first sentence you will say to an agitated student, your two-choice offer for a common flashpoint in your setting, your plan for the audience, and the self-regulation move you will use on yourself. Then name one accelerant from this lesson you have used under stress and what you will do instead. Complete the artifact with a phase map for your flashpoint: one line per phase (trigger, agitation, acceleration, peak, recovery) naming your planned move at each, checked against the accelerant list, plus the four student-debrief steps written in your own words.

Primary sources: S3 · S10 · S27

Lesson 5.213 required minutes

Minn. Stat. 125A.0942: what the restrictive procedures law actually requires

PELSB: knowledge of governing restrictive procedures, Minn. Stat. 125A.0942

Learning objectiveState the statute's prohibited practices, the emergency-only standard for physical holding and seclusion, and the documentation, oversight, and training requirements that follow any use.

Key teaching points

Applied activity

Locate your district's restrictive procedures plan (or note who you will ask for it this week). Then write answers to three questions from memory: two practices the statute absolutely prohibits, the standard that must be met before physical holding or seclusion is used, and two things that must happen after any use. Check your answers against the lesson table. Add a fourth element to the artifact: using the worked example in this lesson as the model, write one complete, de-identified documentation entry for a hypothetical emergency hold in your own setting, then verify it contains every element the statute's documentation standard requires.

Primary sources: S2 · S3 · S31

Module 6 · Apply the framework

38 required minutes

Lesson 6.120 required minutes

Case lab: notice the signs, choose the lawful response, make the referral

Integrated demonstration across all seven PELSB sub-criteria

Learning objectiveAnalyze three student cases and justify recognition, response, referral, family partnership, and legal decisions without diagnosing or exceeding the educator role.

Key teaching points

Applied activity

Complete the eight-part decision record for all three cases. Then compare them in three sentences: one case demanded same-day crisis routing, one demanded lawful de-escalation under the statute, and one demanded seeing through socially praised behavior. State which was hardest for you and why. Then audit your own records against the four failure modes named in this lesson and mark, honestly, the one you drifted toward most; revise the weakest of your three records once before moving on.

Primary sources: S3 · S6 · S8 · S10 · S11 · S27 · S31

Lesson 6.218 required minutes

Capstone: build your recognize-and-refer action plan

Integrated demonstration across all seven PELSB sub-criteria

Learning objectiveProduce a de-identified, building-specific action plan that demonstrates warning-sign recognition, trauma-informed practice, accommodation, family partnership, FASD/ASD support, de-escalation, and statute knowledge.

Key teaching points

Applied activity

Complete the ten-section capstone. Self-check it against the PELSB criterion map in the overview: every one of the seven sub-criteria must be visibly addressed in at least one section. Apply the three quality tests from this lesson to each section and revise every section that fails one. Revise before taking the assessment.

Primary sources: S1 · S2 · S3 · S5 · S6 · S12 · S15 · S17

Assessment question stems

Answer all 20 scenario-based questions. The planned completion threshold is 80% (16 of 20). This reviewer copy shows feedback for the specific option you chose after submission; the deployed version must make the same threshold, scoring, feedback, and remediation rules consistent in the interface and server.

Question stems are listed for study purposes. Answer choices and keys are intentionally omitted.

  1. A usually cheerful fourth grader has cried at drop-off for two days after a family pet died. What does the duration/intensity/interference test suggest?
  2. A teacher is confident a student "has ADHD" after reading about symptoms online. What is the correct professional action?
  3. A tenth grader who was a strong student has, over a semester, withdrawn from friends, stopped bathing regularly, and told you he hears his name called when no one is there. What is the best response?
  4. A student who experienced housing instability explodes when a substitute rearranges the seating chart without warning. A trauma-informed reading of this behavior sees:
  5. A student begins telling you details of frightening events at home. What is the trauma-informed and lawful response?
  6. A student with panic symptoms takes the same chemistry exam in a quieter room with extended time. This is best described as:
  7. A student without any formal plan shows persistent depression-pattern signs and asks about late work. The teacher should:
  8. Which opening best begins a parent conversation about observed warning signs?
  9. A family responds to a mental health concern by saying they will first consult their faith community. The culturally humble educator response is to:
  10. Which statement about Fetal Alcohol Spectrum Disorders is accurate?
  11. A student with FASD breaks the same rule for the third time in a week despite being able to recite it. The best-matched response is:
  12. Which pair correctly names the two core characteristic areas of Autism Spectrum Disorder?
  13. An autistic student who has loved robotics for years abruptly loses interest, starts refusing school, and stops sleeping. The correct interpretation is:
  14. A student is in the agitation phase: muttering, fidgeting, refusing to start work. The phase-matched adult move is to:
  15. During acceleration, a student shouts "You can't make me!" in front of peers. Which adult behavior most reliably escalates the situation further?
  16. Under Minn. Stat. 125A.0942, which practice is prohibited in all circumstances?
  17. Under the statute, physical holding or seclusion of a student with a disability may be used only when:
  18. After a school uses physical holding in an emergency, the statute requires:
  19. A coach praises an athlete's strict dieting; you have documented skipped meals, food rituals, and post-meal bathroom trips over three weeks. The best action is:
  20. What is the correct submission status of this pilot course file?

Primary source register

Sources were checked July 24, 2026. Reconfirm current statutes, rules, forms, data, and agency guidance immediately before submission; statistics cited in lessons reflect the survey years noted by the source agencies.

  1. S1. PELSB 2026 Mandatory Requirements Training Review Form. The reviewer must locate evidence for the Key Warning Signs for Early-Onset Mental Illness area, including mental illness trauma, accommodation, parent/guardian roles, FASD, ASD, de-escalation, and Minn. Stat. 125A.0942.
    https://mn.gov/pelsb/assets/Mandatory%20Requirements%20Training%20Review%20Form%202026%20POST_tcm1113-758525.pdf
  2. S2. Minn. Stat. §122A.187, subd. 6. Renewal training requirement on key warning signs of early-onset mental illness, with subsequent-renewal topics including trauma, accommodations, parents' roles, FASD, autism, section 125A.0942, and de-escalation, drawn from nationally recognized evidence-based programs.
    https://www.revisor.mn.gov/statutes/cite/122A.187
  3. S3. Minn. Stat. §125A.0942 - Standards for Restrictive Procedures. District plan (subd. 1), emergency standards, documentation, and oversight (subd. 3), prohibited practices including prone restraint and K-3 seclusion (subd. 4), and staff training (subd. 5).
    https://www.revisor.mn.gov/statutes/cite/125A.0942
  4. S4. Minn. R. 8710.7200 - Renewal requirements and clock hours. Clock-hour definition and renewal totals (75 hours per three-year Tier 3 period; 125 hours per five-year Tier 4 period) with mandatory professional development categories.
    https://www.revisor.mn.gov/rules/8710.7200/
  5. S5. Minn. R. 8710.2000 - Standards of Effective Practice. Standards on learner development and exceptional needs (Standard 1), learning environments (Standard 2), and culturally affirming, reciprocal family communication (Standard 7).
    https://www.revisor.mn.gov/rules/8710.2000/
  6. S6. National Institute of Mental Health - Child and Adolescent Mental Health. Warning signs for younger children and adolescents, the weeks-of-interference evaluation threshold, treatability and early-intervention evidence, and the 988 Suicide and Crisis Lifeline.
    https://www.nimh.nih.gov/health/topics/child-and-adolescent-mental-health
  7. S7. CDC - Children's Mental Health: Data and Statistics. National prevalence estimates: roughly 1 in 5 children ages 3-17 with a mental, behavioral, or developmental disorder; approximately 11% with current diagnosed anxiety; about 20% of adolescents with a past-year major depressive episode.
    https://www.cdc.gov/children-mental-health/data-research/index.html
  8. S8. CDC - About Fetal Alcohol Spectrum Disorders (FASDs). FASD spectrum (FAS, partial FAS, ARND), CNS effects on learning, memory, attention, and communication, absence of a medical test, and prevention framing.
    https://www.cdc.gov/fasd/index.html
  9. S9. American Academy of Pediatrics - Fetal Alcohol Spectrum Disorders program and toolkit. Clinical toolkit on screening, diagnosis, and support; evidence that early identification reduces the risk of additional disabilities.
    https://www.aap.org/en/patient-care/fetal-alcohol-spectrum-disorders/
  10. S10. National Child Traumatic Stress Network - Child Trauma Toolkit for Educators. Trauma facts for educators, grade-band presentations of trauma from preschool through high school, classroom response guidance, and educator self-care.
    https://www.nctsn.org/resources/child-trauma-toolkit-educators
  11. S11. SAMHSA - How to Talk to Parents and Caregivers of Children About Mental Health. Federal guidance for respectful, stigma-aware conversations with families about children's mental health and connecting families to help.
    https://www.samhsa.gov/mental-health/how-to-talk/parents-and-caregivers
  12. S12. Minnesota Department of Education - School Mental Health. Comprehensive school mental health systems across three tiers: promotion and prevention, early identification and intervention, and intensive supports, in school-community collaboration.
    https://education.mn.gov/MDE/dse/edi/HealthySchoolsTeam/health/
  13. S13. National Institute of Mental Health - Autism Spectrum Disorder. Definition, social communication and behavioral characteristics, co-occurring conditions, and the value of early access to services and supports.
    https://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-asd
  14. S14. CDC - Data on ADHD in Children. National ADHD prevalence estimates (approximately 11.4% of children ages 3-17 ever diagnosed) and co-occurring condition data used for attention-related warning-sign context.
    https://www.cdc.gov/adhd/data/index.html
  15. S15. National Institute of Mental Health - Anxiety Disorders. Federal clinical overview: anxiety that persists, generalizes across situations, and worsens over time; generalized anxiety, panic, social anxiety, and phobia-related disorders. Verified live 2026-07-24.
    https://www.nimh.nih.gov/health/topics/anxiety-disorders
  16. S16. National Institute of Mental Health - Depression. Federal clinical overview distinguishing depressive illness from ordinary sadness by severe symptoms that affect daily functioning; treatment evidence. Verified live 2026-07-24.
    https://www.nimh.nih.gov/health/topics/depression
  17. S17. National Institute of Mental Health - Attention-Deficit/Hyperactivity Disorder. Federal clinical overview: ongoing pattern of inattention, hyperactivity, and/or impulsivity occurring across multiple settings. Verified live 2026-07-24.
    https://www.nimh.nih.gov/health/topics/attention-deficit-hyperactivity-disorder-adhd
  18. S18. National Institute of Mental Health - Eating Disorders. Federal clinical overview: serious, potentially life-threatening illnesses with severe disturbances in eating behavior and elevated medical risk. Verified live 2026-07-24.
    https://www.nimh.nih.gov/health/topics/eating-disorders
  19. S19. National Institute of Mental Health - Recovery After an Initial Schizophrenia Episode (RAISE). Research initiative showing coordinated specialty care after first-episode psychosis outperforms standard care on symptoms and quality of life; basis for early-referral guidance. Verified live 2026-07-24.
    https://www.nimh.nih.gov/health/topics/schizophrenia/raise
  20. S20. American Academy of Child and Adolescent Psychiatry - Facts for Families Guide. Clinically reviewed family-facing fact sheets on child and adolescent mental health conditions, for use in family partnership. Verified live 2026-07-24.
    https://www.aacap.org/AACAP/Families_and_Youth/Facts_for_Families/Layout/FFF_Guide-01.aspx
  21. S21. Wolraich ML, et al. Clinical Practice Guideline for the Diagnosis, Evaluation, and Treatment of ADHD in Children and Adolescents. Pediatrics. 2019;144(4):e20192528. American Academy of Pediatrics guideline: cross-setting symptom standard for evaluation and first-line behavioral classroom supports. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/31570648/
  22. S22. Hoyme HE, et al. Updated Clinical Guidelines for Diagnosing Fetal Alcohol Spectrum Disorders. Pediatrics. 2016;138(2):e20154256. Current clinical diagnostic framework for FAS, partial FAS, and ARND; clinical (not laboratory) diagnosis. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/27464676/
  23. S23. May PA, Chambers CD, et al. Prevalence of Fetal Alcohol Spectrum Disorders in 4 US Communities. JAMA. 2018;319(5):474-482. Active-case-ascertainment study of 13,146 first graders: conservative FASD prevalence 1.1% to 5.0%. Verified live at publisher 2026-07-24.
    https://jamanetwork.com/journals/jama/fullarticle/2671465
  24. S24. CDC ADDM Network. Prevalence and Early Identification of Autism Spectrum Disorder Among Children Aged 4 and 8 Years, 16 Sites, United States, 2022. MMWR Surveill Summ. 2025;74(SS-2). ASD prevalence 32.2 per 1,000 (1 in 31) among 8-year-olds in 2022 surveillance. Verified via corroboration (CDC PDF and PubMed Central record) 2026-07-24.
    https://www.cdc.gov/mmwr/volumes/74/ss/ss7402a1.htm
  25. S25. Hyman SL, Levy SE, Myers SM. Identification, Evaluation, and Management of Children With Autism Spectrum Disorder. Pediatrics. 2020;145(1):e20193447. American Academy of Pediatrics clinical report: two-domain characteristics, co-occurring conditions, early identification benefit. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/31843864/
  26. S26. Lord C, Elsabbagh M, Baird G, Veenstra-Vanderweele J. Autism spectrum disorder. Lancet. 2018;392(10146):508-520. Clinical seminar: social communication and repetitive sensory-motor domains, spectrum variability, co-occurring mental health conditions. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/30078460/
  27. S27. Richmond JS, et al. Verbal De-escalation of the Agitated Patient: Consensus Statement of the American Association for Emergency Psychiatry Project BETA De-escalation Workgroup. West J Emerg Med. 2012;13(1):17-25. Ten-domain clinical consensus for verbal de-escalation underpinning Lesson 5.1 techniques. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/22461917/
  28. S28. SAMHSA - Concept of Trauma and Guidance for a Trauma-Informed Approach (HHS Publication SMA14-4884, 2014). Federal definition of trauma (event, experience, effects) and trauma-informed principles applied in Module 2. Verified via corroboration (SAMHSA Library and NCTSN records referencing the exact document) 2026-07-24.
    https://library.samhsa.gov/product/samhsas-concept-trauma-and-guidance-trauma-informed-approach/sma14-4884
  29. S29. National Child Traumatic Stress Network - About Child Trauma. Definition of traumatic events and child traumatic stress as persistent, functioning-interfering reactions. Verified live 2026-07-24.
    https://www.nctsn.org/what-is-child-trauma/about-child-trauma
  30. S30. Felitti VJ, et al. Relationship of Childhood Abuse and Household Dysfunction to Many of the Leading Causes of Death in Adults: The Adverse Childhood Experiences (ACE) Study. Am J Prev Med. 1998;14(4):245-258. Foundational ACEs study: 4-fold to 12-fold increased risks with four or more adversity categories. Verified against PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/9635069/
  31. S31. Minnesota Department of Education - Restrictive Procedures. MDE page for restrictive-procedures guidance and the annual legislative report on districts' use of physical holds and seclusion. Verified via corroboration (MDE site listing and published FY legislative report) 2026-07-24.
    https://education.mn.gov/MDE/dse/sped/restr/
  32. S32. American Psychiatric Association - Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR). Orientation to the clinical diagnostic reference; cited to mark the boundary between educator observation and clinical diagnosis. Verified via corroboration (APA site records referencing the exact page) 2026-07-24.
    https://www.psychiatry.org/psychiatrists/practice/dsm
  33. S33. Brysbaert M. How many words do we read per minute? A review and meta-analysis of reading rate. J Mem Lang. 2019;109:104047. Meta-analysis of 190 studies: mean adult silent reading of non-fiction 238 wpm, slower for difficult study text; basis of the clock-hour computation. Verified via corroboration (university repository and full-text records) 2026-07-24.
    https://doi.org/10.1016/j.jml.2019.104047
  34. S34. Kessler RC, Berglund P, Demler O, Jin R, Merikangas KR, Walters EE. Lifetime Prevalence and Age-of-Onset Distributions of DSM-IV Disorders in the National Comorbidity Survey Replication. Arch Gen Psychiatry. 2005;62(6):593-602. Half of all lifetime mental disorders begin by age 14 and three quarters by age 24; median onset near age 11 for anxiety and impulse-control disorders. Added in the depth-expansion pass; verified live against the PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/15939837/
  35. S35. Merikangas KR, He JP, Burstein M, et al. Lifetime Prevalence of Mental Disorders in U.S. Adolescents: Results from the National Comorbidity Survey Replication-Adolescent Supplement (NCS-A). J Am Acad Child Adolesc Psychiatry. 2010;49(10):980-989. Survey of 10,123 adolescents ages 13-18: lifetime prevalence 31.9% anxiety, 19.1% behavior, 14.3% mood, 11.4% substance use disorders; 22.2% with severe impairment; roughly 40% comorbidity across classes. Added in the depth-expansion pass; verified live against the PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/20855043/
  36. S36. Merrick MT, Ford DC, Ports KA, Guinn AS. Prevalence of Adverse Childhood Experiences From the 2011-2014 Behavioral Risk Factor Surveillance System in 23 States. JAMA Pediatr. 2018;172(11):1038-1044. Multistate surveillance: 61.55% of adults reported at least one ACE and 24.64% reported three or more, with emotional abuse the most prevalent category and significantly higher ACE burden among low-income, unemployed, and several minoritized groups. Added in the depth-expansion pass; verified live against the PubMed record 2026-07-24.
    https://pubmed.ncbi.nlm.nih.gov/30242348/