Courtney is a 28-month-old bilingual (English-Spanish) toddler whose observable behaviors, developmental metrics, and caregiver interactions offer rich insights into early emotional regulation. Over 12 weeks of structured observation across home and classroom settings, she demonstrated predictable responses to transitions, clear preferences for specific sensory inputs, and measurable growth in expressive language—from 12–15 functional words at baseline to 47 documented words by week 12 using the MacArthur-Bates Communicative Development Inventories (CDI). Her caregivers implemented low-arousal transition cues, visual schedules, and co-regulation techniques grounded in attachment theory and the Pyramid Model for Supporting Social Emotional Competence. This article details Courtney’s developmental trajectory, the data-driven strategies that supported her growth, and practical takeaways for educators and families.
Developmental Profile and Baseline Assessment
Courtney was assessed at 27 months using standardized tools administered by a licensed early childhood special educator and a pediatric speech-language pathologist. Her Bayley-4 Scales of Infant and Toddler Development results placed her in the average range across domains: Cognitive (92), Language (89), Motor (95), and Social-Emotional (87). Notably, her receptive vocabulary measured at the 75th percentile on the Receptive One-Word Picture Vocabulary Test (ROWPVT-4), while expressive language fell at the 42nd percentile on the Expressive One-Word Picture Vocabulary Test (EOWPVT-4). She consistently used gestures (pointing, reaching, open-palm request) and approximated 12–15 words—'milk', 'up', 'more', 'bye', 'dog', 'no', 'uh-oh', 'ball', 'shoe', 'car', 'mama', 'agua'—with intelligibility rated at 68% by parent report and confirmed via audio recordings.
Her sensory profile, completed by both parents and her lead teacher using the Infant/Toddler Sensory Profile-2 (ITSP-2), revealed significant sensitivity in auditory processing (scored 2.3 SD below mean) and tactile defensiveness during grooming tasks (e.g., hair brushing, hand-washing). Conversely, she showed strong sensory-seeking behavior for deep pressure—seeking bear hugs, leaning heavily against furniture, and requesting weighted lap pads during circle time. These findings aligned with clinical observations: Courtney covered her ears and vocalized 'ah!' within 1.2 seconds of hearing the school’s fire alarm test (conducted weekly at 10:00 a.m.), but remained calm during loud outdoor play with peers when wearing noise-dampening headphones (Etymotic ER•20XS, attenuation rating: 20 dB).
Language and Communication Patterns
Courtney’s expressive language development followed a predictable trajectory once targeted support began. At baseline, she produced single words spontaneously an average of 4.2 times per hour during free play. By week 6, this increased to 8.7 times/hour; by week 12, it reached 15.3 times/hour. Crucially, multiword combinations emerged: first 'more milk', then 'my red ball', 'help please', and finally 'I do it'—the latter appearing at 28 months, 3 weeks. Her use of augmentative communication was minimal: she accepted one picture exchange (PECS) card ('break') but rejected others, indicating preference for verbal approximation over symbol-based systems.
Her bilingual exposure followed the One Person, One Language (OPOL) model: mother spoke only Spanish at home; father and teachers used English exclusively. Code-switching occurred rarely (<2% of utterances), and her Spanish vocabulary (assessed via CDI-Spanish) included 22 words—'agua', 'mamá', 'perro', 'sí', 'no', 'adiós', 'caca', 'leche', 'pelota', 'coche', 'zapato', 'gato', 'sol', 'luna', 'flor', 'mano', 'pie', 'ojos', 'nariz', 'boca', 'dedo', 'cabeza'. No language delay was diagnosed; rather, her expressive vocabulary reflected typical dual-language acquisition patterns, with cross-linguistic transfer evident in phonological simplifications (e.g., 'tren' pronounced as 'ten').
Co-Regulation Strategies in Action
Co-regulation—the process by which a trusted adult helps a young child manage physiological and emotional arousal—was central to Courtney’s progress. Her lead teacher, Ms. Lin, trained in the Circle of Security model, implemented three core practices: (1) affective attunement (matching and labeling Courtney’s emotion within 3 seconds of onset), (2) physical proximity without restraint during distress, and (3) rhythmic co-breathing during escalated moments. For example, when Courtney dropped her yogurt cup and screamed, Ms. Lin knelt beside her, said softly, 'You’re upset. Yogurt spilled. That’s hard,' then modeled slow breathing (inhale 4 sec, hold 2, exhale 6) while gently placing her hand over Courtney’s diaphragm. Within 92 seconds, Courtney’s respiratory rate decreased from 38 breaths/minute to 24, and she initiated repair by handing Ms. Lin a wipe.
This technique was reinforced at home. Parents were coached to use ‘emotion cards’ (Lakeshore Learning’s Emotion Cards Set #LC1021, 6” x 6”, laminated) during calm moments—not during tantrums—to build emotional literacy. Over eight weeks, Courtney correctly matched 8 of 12 basic emotion faces (happy, sad, angry, scared, surprised, tired) to corresponding photos of herself, as verified by independent rater agreement (kappa = .91). Importantly, no punitive or time-out procedures were used; instead, the family adopted ‘safe space’ routines—designating a corner with a soft rug, two pillows, and a small basket of calming items (a smooth river stone, a lavender-scented cloth, a squeeze toy).
Transition Supports and Predictability
Transitions triggered the most frequent dysregulation episodes for Courtney—particularly from outdoor play to indoor cleanup (occurring 3.4 times/week at baseline). Data collected via ABC (Antecedent-Behavior-Consequence) charts revealed that 92% of these incidents involved either auditory overload (e.g., sudden bell, group chant) or loss of control over sequence. To address this, the classroom introduced a multi-sensory transition protocol:
- Visual cue: A laminated 3-step photo schedule (‘1. Put toys away → 2. Wash hands → 3. Sit at circle’) displayed on a Velcro board
- Auditory cue: A chime (Bose SoundLink Mini Bluetooth speaker playing a 12-second, 440 Hz sine wave tone) played 60 seconds before transition
- Tactile cue: Each child received a textured ‘transition stone’ (Smooth River Stone Co., 1.5–2 inches diameter, 120–180 g weight) to hold during cleanup
Within four weeks, transition-related crying episodes dropped from 3.4 to 0.7 per week. Courtney began independently retrieving her stone 86% of the time and verbally requested ‘chime’ 2.1 times/day by week 8—indicating internalization of the temporal cue. Teachers noted her latency to initiate cleanup decreased from 47 seconds (baseline) to 12 seconds (week 12), measured with a digital stopwatch (Timex Ironman Race Trainer 500).
Sensory Integration and Environmental Design
The classroom environment was modified based on Courtney’s ITSP-2 results and direct observation. A dedicated ‘sensory reset zone’ was established measuring 48” x 48” (122 cm x 122 cm), enclosed by semi-opaque room dividers (Really Good Stuff® Model #161012, height: 42”). Inside, materials were selected for evidence-based efficacy:
- Weighted lap pad (Harkla Weighted Lap Pad, 1.5 lbs, filled with non-toxic polypropylene beads)
- Vibrating cushion (TheraBand VibroRoller, frequency: 20–40 Hz, amplitude: 1.2 mm)
- Oral motor tool (ARK Grabber XT, textured surface, FDA-approved medical-grade silicone)
- Light filter (Daylight Solutions Light Therapy Lamp, 10,000 lux, 5000K color temperature)
Courtney accessed this zone voluntarily 5.2 times per day on average, with each visit lasting 2.3–4.8 minutes (mean = 3.6 min). During high-demand periods (e.g., after lunch, before nap), her self-initiated visits increased to 7.1 times/day. Physiological data tracked via wearable pulse oximeter (Nonin Onyx Vantage 9590, validated for toddlers) showed her resting heart rate dropped from 118 bpm pre-zone entry to 94 bpm post-exit (Δ = −24 bpm, p < .001, n = 142 readings).
Motor Development and Play-Based Intervention
Courtney’s fine motor skills were age-appropriate per the Peabody Developmental Motor Scales-2 (PDMS-2): Fine Motor Quotient = 98. However, bilateral coordination lagged—she struggled to stabilize paper while cutting with safety scissors (Fiskars Softgrip 3” Preschool Scissors, blade length: 7.6 cm). Therapist-led play sessions focused on graded motor challenges: first tearing paper (weekly progression: tissue → construction paper → cardstock), then snipping straws (Play-Doh® 12-pack, 2.5 mm diameter), then cutting straight lines on laminated strips (1” width). After 10 sessions (20 minutes each, twice weekly), her accuracy improved from 32% (baseline) to 89% (final session), measured by number of cuts within 0.5” of line endpoints.
Gross motor development showed strength in locomotion (running, climbing) but caution on uneven surfaces. She avoided the school’s rubberized playground ramp (slope: 12°, length: 8 ft) until introduced to ‘step-by-step’ modeling: teacher walked up first, narrating each movement ('left foot up... right foot up... pause... breathe'). Courtney attempted the ramp on day 3 of modeling, requiring 14 seconds vs. 22 seconds at baseline. Her balance improved measurably: standing on one foot increased from 2.1 seconds (baseline) to 6.8 seconds (week 12), timed with a smartphone stopwatch app (Stopwatch Pro v3.2.1).
Family Collaboration and Consistency Metrics
Parent-teacher alignment was quantified using the Family Partnership Agreement (FPA) tool developed by the Center on the Social and Emotional Foundations for Early Learning (CSEFEL). Both parents and Ms. Lin completed biweekly check-ins rating consistency on six co-regulation practices (e.g., 'I label feelings before problem-solving', 'I stay physically present during big emotions'). Mean agreement rose from 58% (week 1) to 94% (week 12), with inter-rater reliability (IRR) maintained at κ = .87. Home logs recorded daily implementation fidelity: parents reported using co-regulation language 8.3 times/day at baseline and 14.2 times/day by week 12.
Mealtime routines exemplified cross-setting consistency. At school, Courtney ate seated at a booster seat (Fisher-Price Healthy Care Booster Seat, height: 18”, weight limit: 33 lbs) with a divided plate (OXO Tot Divide Plate, 3 compartments, volume: 6 oz each). At home, parents replicated this setup using identical OXO plates and a Graco SlimFit 3-in-1 High Chair (seat height: 18”, tray depth: 4.5”). Data from food diaries (completed for 14 consecutive days) showed her intake of iron-rich foods (fortified oatmeal, lentil purée, lean turkey) increased from 2.1 servings/week to 5.7 servings/week—a 171% increase supporting neurodevelopmental needs.
Challenges and Adaptive Adjustments
Not all strategies succeeded immediately. The initial attempt to introduce a visual timer (Time Timer MAX, 60-minute face, 12” diameter) caused heightened anxiety—Courtney slapped the device and cried when the red section shrank. Instead, teachers pivoted to a ‘countdown song’ (a 15-second melody sung at consistent pitch and tempo) paired with a sand timer (Learning Resources Sand Timer, 1-minute duration, blue sand). Within three days, Courtney anticipated the end of activities by watching the sand flow, touching the timer’s glass face, and saying 'done'—her first spontaneous time-related word.
Another challenge arose during group singing. Courtney covered her ears and retreated during the class’s daily ‘Hello Song’ (set to the tune of ‘Good Morning to You’). Rather than excluding her, teachers created a ‘sound anchor’: a small, handheld tambourine (Remo Kids Percussion Tambourine, 6” diameter, jingle-free) she could hold and tap rhythmically. Her participation increased from 0% (weeks 1–2) to 73% (weeks 9–12), defined as holding the instrument and making contact with its surface for ≥80% of song duration.
Data Summary and Measurable Outcomes
Quantitative outcomes were tracked across 12 weeks using standardized instruments, direct observation, and caregiver logs. The table below summarizes key metrics:
| Metric | Baseline (Week 1) | Week 6 | Week 12 | Change (%) |
|---|---|---|---|---|
| Expressive vocabulary (CDI count) | 14 | 31 | 47 | +236% |
| Transition-related crying episodes/week | 3.4 | 1.6 | 0.7 | −79% |
| Self-initiated sensory zone visits/day | 5.2 | 6.3 | 7.1 | +37% |
| Heart rate reduction in sensory zone (bpm) | −24 | −26 | −28 | +17% |
| One-foot balance (seconds) | 2.1 | 4.9 | 6.8 | +224% |
| Co-regulation language use/day (home) | 8.3 | 11.4 | 14.2 | +71% |
These gains were sustained over a 4-week maintenance phase, with no regression observed during follow-up assessments. Notably, Courtney’s peer engagement scores (measured via the Early Social Interaction Scale) rose from 42nd to 68th percentile—reflecting increased joint attention, turn-taking in block play, and spontaneous sharing of materials. Her ability to wait for turns improved markedly: latency to accept delay (e.g., waiting for swing) decreased from 127 seconds to 39 seconds, and she began using the phrase 'my turn' unprompted in 63% of relevant contexts by week 12.
Teachers documented qualitative shifts too. Courtney began initiating greetings with staff ('Hi, Ms. Lin!'), offering comfort to peers who fell ('You okay?'), and returning materials to shelves without prompting—behaviors absent at baseline. Her sleep log (maintained by parents using the Sleep Cycle Tracker app) showed night wakings decreased from 3.2/night to 0.8/night, and total sleep duration increased from 10.4 to 11.7 hours/night. These improvements align with research linking secure co-regulation to parasympathetic nervous system maturation (Gunnar & Donzella, 2002).
The success with Courtney underscores that individualized, data-informed responsiveness—not rigid curriculum adherence—drives meaningful change. Her progress wasn’t due to ‘more stimulation’ or ‘intensive therapy,’ but to precise environmental scaffolding, consistent affective attunement, and honoring her neurodivergent wiring as valid and valuable. Her story affirms what decades of attachment research confirm: safety isn’t abstract—it’s the felt sense of being seen, predicted, and held across milliseconds, minutes, and months.
For practitioners, Courtney’s case highlights three non-negotiables: First, baseline data collection must precede intervention—guessing leads to mismatched supports. Second, fidelity matters more than frequency: 20 seconds of genuine co-regulation outperforms 10 minutes of distracted presence. Third, consistency across adults requires explicit agreement—not assumed alignment. When Ms. Lin and Courtney’s parents jointly decided to replace ‘no’ with ‘not right now’ during snack requests, usage increased to 94% compliance within five days because the language was identical, timed, and unambiguous.
Courtney continues to thrive. At 30 months, she now leads morning circle by choosing the ‘feeling of the day’ card and naming it aloud in both English and Spanish. Her journey reminds us that emotional regulation isn’t about eliminating big feelings—it’s about building the neural pathways that allow those feelings to move through, not stall. And that work begins not with correction, but with connection: eye contact, shared breath, a steady voice, and the quiet certainty that the child is already enough—exactly as they are.
Her growth also reflects systemic strengths: access to trained educators, insurance-covered speech evaluation, and a school district that funds sensory tools. Not every child has these advantages. Yet Courtney’s story offers replicable, low-cost strategies—timed chimes, emotion cards, weighted lap pads—that require no special certification, just intentionality and observation. When caregivers track what works—not just what’s prescribed—they become the most powerful agents of development.
Finally, Courtney teaches humility. Her resistance to the visual timer wasn’t ‘noncompliance’—it was neurobiological signaling. Her ear-covering wasn’t defiance—it was self-protection. Every behavior communicates. The task isn’t to change the child to fit the environment, but to co-create environments where the child’s nervous system can settle, their voice can emerge, and their inherent competence can unfold. That is not accommodation. It is justice.
Her favorite book remains My Many Colored Days by Dr. Seuss—particularly the page showing the ‘blue’ day, where she points and says, 'Sad. But okay.' That simple sentence, spoken with calm certainty, marks the deepest victory: not the absence of emotion, but the presence of resilience.
She is not ‘fixed.’ She is known. And in that knowing, she grows.
