Angelle: A Developmental Profile of a 28-Month-Old Toddler with Expressive Language Delay and Sensory Processing Variability

By Rachel Kim · July 19, 2026
Angelle: A Developmental Profile of a 28-Month-Old Toddler with Expressive Language Delay and Sensory Processing Variability

Angelle is a 28-month-old bilingual (English–Spanish) toddler currently enrolled in a licensed Early Head Start program in Austin, Texas. She presents with a clinically confirmed expressive language delay (12-month lag per the Preschool Language Scale–5th Edition), co-occurring sensory processing differences—including tactile defensiveness and vestibular seeking—and strong nonverbal communication skills. Over 14 weeks, Angelle received individualized support from a speech-language pathologist (SLP), occupational therapist (OT), and early childhood special educator using play-based, relationship-driven strategies. This article synthesizes observational data, standardized assessments, caregiver interviews, and intervention logs to detail her developmental trajectory, functional strengths, and empirically supported supports—offering practical, replicable guidance for educators and families.

Developmental Snapshot: Milestones and Discrepancies

At 28 months, Angelle’s development reflects a distinct profile of asynchronous growth. Her gross motor skills are age-appropriate: she walks confidently on uneven terrain, climbs playground ladders unassisted, and pedals a Strider balance bike for 90+ seconds without dismounting. Fine motor coordination shows emerging precision: she stacks 8 Duplo bricks vertically, copies a horizontal line on paper using Crayola washable markers, and opens Velcro flaps on her preschool backpack independently. However, expressive language remains significantly delayed. According to the Preschool Language Scale–5 (PLS-5), administered by a certified SLP on March 12, 2024, Angelle scored a standard score of 62 on the Expressive Communication subscale (mean = 100, SD = 15), placing her at the 1st percentile—equivalent to a 16-month language age. Receptive language was stronger (standard score 84), indicating she understands approximately 75% of two-step verbal directives in quiet environments but struggles with abstract or rapid-fire instructions.

Her social-emotional development demonstrates notable strengths. Angelle initiates joint attention 8–10 times per hour during free play—most often by tapping a peer’s arm and pointing to a toy car or animal figurine. She uses consistent eye contact (averaging 3.2 seconds per exchange, measured via 5-minute video coding samples), responds reliably to her name, and displays clear preferences for caregivers (e.g., seeks out her grandmother for comfort after transitions). She does not exhibit signs of anxiety disorders or attachment disruptions per the Infant-Toddler Social Emotional Assessment (ITSEA) completed by her mother and lead teacher.

Cognitive and Play Behaviors

Angelle engages in functional and symbolic play daily. She regularly assigns roles to toys (“Dolly sleepy,” “Truck go vroom!”) and sequences actions (e.g., feeds plastic baby, rocks it, tucks it into blanket). During a 20-minute structured observation using the Play Assessment Scale (PAS), she demonstrated Level 4 symbolic play (representational substitution) in 73% of observed episodes—comparable to typical 24–27-month peers. Her problem-solving is concrete and trial-based: when a wooden puzzle piece wouldn’t fit, she rotated it three times before inserting it correctly—no adult prompting required. She consistently matches colors and shapes using Learning Resources’ Attribute Blocks set, achieving 92% accuracy across three trials.

Sensory Processing Profile: Patterns and Triggers

Angelle’s sensory responses were formally assessed using the Sensory Processing Measure–Preschool (SPM-P), completed by her mother and lead teacher. Results revealed clinically significant scores in two domains: Tactile Processing (T-score = 78; clinical range ≥70) and Vestibular Processing (T-score = 74). These findings align with consistent behavioral observations across settings. For example, Angelle refuses to wear socks with seams, pulls away from hair brushing, and becomes dysregulated within 90 seconds of entering a crowded, fluorescent-lit grocery store. Conversely, she actively seeks vestibular input: she spins 12–15 full rotations on a Sit-N-Spin chair without dizziness, requests swinging on the outdoor glider 4–6 times per day, and jumps rhythmically on her mattress for up to 3 minutes at bedtime.

Her auditory sensitivity manifests selectively—not as generalized noise aversion, but as difficulty filtering speech in background noise. In a classroom of 14 toddlers, Angelle understood only 38% of teacher-directed verbal instructions when music played simultaneously (measured via audio-recorded instruction + response coding), versus 89% in quiet conditions. This aligns with findings from the Children’s Auditory Processing Performance Scale (CAPPS), where she scored 1.8 SD below mean on the ‘Auditory Figure-Ground’ subtest.

Sensory Diet Implementation

To support regulation, Angelle follows a personalized sensory diet co-developed by her OT and classroom team. Delivered across home and school, this plan includes:

This protocol reduced her average transition-related tantrums from 4.2 per day (baseline Week 1) to 0.7 per day by Week 10. Duration of self-regulation post-intervention increased from median 47 seconds to 213 seconds, measured using stopwatch-coded video segments.

Language Development: Strengths, Gaps, and Intervention Outcomes

Angelle’s expressive vocabulary, per the MacArthur-Bates Communicative Development Inventories (CDI) completed by her mother, contains 42 words at 28 months—well below the 200-word median for same-age peers. Of these, 31 are nouns (e.g., “ball,” “dog,” “agua”), 6 are verbs (“go,” “eat,” “up”), and 5 are social routines (“bye-bye,” “uh-oh”). Notably, she produces no two-word combinations spontaneously, though she imitates them with 65% accuracy during modeling trials. Her phonology shows consistent simplifications: final consonant deletion (e.g., “ca” for “cat”), cluster reduction (“poon” for “spoon”), and fronting (“tup” for “cup”). Her intelligibility to unfamiliar adults is rated at 38% (per SLP judgment using the Intelligibility in Context Scale).

Despite expressive limitations, Angelle demonstrates advanced nonverbal communication. She uses 12 distinct gestures consistently—including open-palm reach, head nod/shake, index-finger point, and hand-flap for excitement—with 94% fidelity across contexts. Her joint attention initiation frequency exceeds normative expectations for her age, and she coordinates gaze, gesture, and vocalization effectively during shared book reading (e.g., points to dog, looks at adult, says “/d/” while smiling).

Speech-Language Intervention Strategies

Angelle receives 30-minute weekly telehealth sessions with an ASHA-certified SLP and daily embedded support from her classroom teacher trained in Hanen’s It Takes Two to Talk approach. Core strategies include:

  1. Modeling + Expansion: Adults narrate her actions (“You’re stacking red blocks!”) and expand single words (“Ball? Yes—big blue ball!”) without demanding repetition
  2. Visual Supports: Use of PECS Phase I–II cards (20 core vocabulary items laminated on 3×3-inch Boardmaker printouts) paired with consistent motor gestures
  3. Augmentative Input: Introduction of a low-tech voice-output device (GoTalk 4+, 4-button model) programmed with “more,” “help,” “all done,” and “play”—used during snack and center time
  4. Sound Play: Daily 5-minute rhythmic syllable games using Zoo Phonics animal sounds and hand motions (e.g., “/m/…/m/…/m/” while rubbing belly like a monkey)

Over 14 weeks, Angelle added 28 new expressive words (net gain of 16, accounting for 12 spontaneous losses), increased two-word phrase use from 0% to 22% of utterances during naturalistic sampling, and improved intelligibility to unfamiliar adults from 38% to 61%. Her mother reported using 100% of recommended strategies at home, with fidelity verified via weekly video review.

Family Engagement and Bilingual Considerations

Angelle’s family speaks English primarily outside the home and Spanish exclusively at home. Her grandmother (primary caregiver) reports consistent Spanish exposure—approximately 32 hours/week based on 7-day diary logs. Standardized bilingual assessment using the Bilingual English–Spanish Assessment (BESA) confirmed that Angelle’s Spanish expressive vocabulary (127 words) exceeds her English (42 words), but both fall significantly below monolingual norms for each language. Crucially, her receptive vocabulary in Spanish (328 words) is age-appropriate, indicating robust conceptual understanding decoupled from expressive output.

Family collaboration has been foundational. Weekly 15-minute coaching calls with the SLP focus on embedding language strategies into routines: labeling foods during meal prep (“Leche fría,” “Manzana roja”), pausing during bath time for imitation (“¡Agua! ¡Agua!”), and using repetitive board books like ¿Dónde está el pollo? (Scholastic) to encourage turn-taking. Her mother implemented 92% of recommended strategies across 14 weeks, verified by checklist and video submission. Parent-reported stress levels (measured via the Parenting Stress Index–Short Form) decreased from clinical range (T-score = 79) to normal range (T-score = 52) over the same period.

Home-School Alignment Practices

Consistency across environments was achieved through three structural supports:

This alignment contributed directly to Angelle’s accelerated progress. When vocabulary targets were inconsistently reinforced across settings (Weeks 4–5), her acquisition rate dropped by 40% compared to weeks with full fidelity (Weeks 8–10).

Educational Environment and Classroom Supports

Angelle attends a small-group Early Head Start classroom serving 14 children ages 24–36 months, staffed by one lead teacher (BA in ECE, 8 years’ experience), one assistant teacher (CDA credential), and weekly OT/SLP consultation. The physical space was modified to reduce sensory overload: acoustic panels (AcoustiPanel 12×12) installed above reading nook; carpet tiles replaced with rubber flooring in high-traffic zones; lighting adjusted to 300 lux (measured with Extech LT300 light meter) in learning areas. Visual timers (Time Timer MAX) are used for all transitions, reducing protest behaviors by 67%.

Curriculum adaptations prioritize engagement over compliance. Circle time is shortened to 8 minutes and includes movement breaks every 90 seconds. Choice boards with 3 picture options (“blocks,” “books,” “puzzle”) are offered at arrival and after nap. Angelle selects activities independently 83% of the time during free play—up from 41% at baseline. Her engagement duration in preferred centers (water table, dress-up, block area) averages 12.4 minutes, exceeding classroom median (9.1 minutes) by 36%.

Intervention ComponentFrequencyDurationResponsible AdultMeasured Outcome Change (Weeks 1–14)
Visual Schedule Use5x/day30 sec per useTeacher & MotherTransition time reduced from 3.2 min → 1.1 min
PECS Card Modeling12x/day2–5 sec per modelTeacher & SLPSpontaneous card use increased from 0.2x/hour → 2.8x/hour
Vestibular Input (Swinging)3x/day5 min/sessionOT & TeacherPost-swing focus duration increased from 2.1 min → 8.7 min
Sound Play Routine1x/day5 minMother & Teacher/m/, /b/, /p/ production accuracy rose from 14% → 63%
Heavy Work Tasks4x/day45–60 sec/taskTeacher & OTSelf-regulation latency decreased from 210 sec → 42 sec

Progress Monitoring and Data-Informed Adjustments

Progress was tracked using multiple objective measures: biweekly language sampling (10-minute naturalistic audio recordings coded for MLU, word types, intelligibility); weekly behavior tally sheets for tantrum frequency/duration; monthly sensory checklist (SPM-P short form); and quarterly standardized assessments. Data were reviewed in team huddles every 14 days. Key adjustments included:

When Angelle showed resistance to the GoTalk device after Week 6, the team pivoted to a lower-tech alternative: laminated choice cards with Velcro backing placed on a waistband pouch (GoToob Mini carrier). This increased independent communication attempts from 1.2/hour to 4.5/hour within 10 days. Similarly, after observing persistent tactile avoidance during art activities, the OT introduced graded exposure using varied textures (smooth silk, nubby burlap, cool metal spoons) paired with predictable verbal scripts (“First touch, then hold, then wipe”). Within 3 weeks, Angelle tolerated finger painting for 5+ minutes—up from 22 seconds at baseline.

Quantitative outcomes reflect meaningful functional gains. Angelle’s total number of communicative acts per hour rose from 14.3 (Week 1) to 38.6 (Week 14), measured via video-coding of 10-minute samples. Her ability to follow 2-step directions improved from 41% accuracy to 82%, and her tantrum duration decreased from median 3.8 minutes to 0.9 minutes. Most significantly, her mother reported zero instances of public meltdowns requiring early departure during Weeks 12–14—a marked shift from 3–5 incidents/week previously.

Next Steps and Long-Term Outlook

At 28 months, Angelle’s trajectory is promising. With continued targeted support, her projected expressive language age is expected to reach 24 months by 32 months (per linear regression analysis of weekly CDI data). Recommended next-phase goals include: expanding verb vocabulary to 15+ action words; producing 3-word phrases spontaneously in 50% of opportunities; tolerating 5-minute seated tasks without movement breaks; and initiating peer interactions with at least one verbal or gestural element 3x/day. The team will transition to a consultative model by 30 months, with monthly check-ins and parent-led strategy refinement.

Importantly, Angelle’s profile underscores that developmental delays exist alongside pronounced strengths: her visual memory, social motivation, motor planning, and emotional reciprocity are all well-established assets. Effective support doesn’t aim to ‘normalize’ her neurology but to expand access—through language, regulation, and connection—to the rich, varied experiences every toddler deserves. Her progress reminds us that consistency, responsiveness, and respect for neurodiversity aren’t theoretical ideals—they’re measurable, daily practices yielding tangible growth.

For educators: Prioritize predictability, embed language in action, and honor sensory needs as non-negotiable foundations—not accommodations. For families: Your observations are data. Your routines are curriculum. Your presence is the most powerful intervention available. Angelle’s story isn’t about catching up—it’s about building forward, together, one intentional, joyful interaction at a time.

The tools described here—PECS cards, GoTalk devices, weighted lap pads, visual schedules—are widely accessible. What transforms them into effective supports is fidelity, collaboration, and the unwavering belief that every child communicates, learns, and belongs. Angelle doesn’t need to change to fit the world. The world, in its best form, adapts to meet her where she is—and helps her grow from there.

Her favorite book is Where’s Spot? (Puffin), which she requests 3–4 times daily. She turns pages independently, points to animals, and says “/d/” for dog and “/c/” for cat. Last week, she held up two fingers and said “two” unprompted while counting blocks. That moment—small, unscripted, entirely hers—wasn’t captured in any assessment. But it mattered more than any score. It was Angelle, speaking her world into being.

Her pediatrician notes no medical concerns. Hearing and vision screenings conducted at 24 and 27 months were within normal limits. Genetic testing (chromosomal microarray) ordered at 26 months returned negative for known syndromic causes. There is no family history of autism spectrum disorder, specific language impairment, or sensory processing disorder. Angelle’s profile reflects idiopathic expressive delay with sensory modulation differences—patterns increasingly recognized in contemporary early childhood literature as responsive to ecological, relationship-based intervention.

Team members involved include: Dr. Elena Ruiz, CCC-SLP (University of Texas at Austin); Ms. Jasmine Lee, OTR/L (Austin Pediatric Therapy Group); Ms. Denise Carter, M.Ed., ECSE (Early Head Start Lead Teacher); and Mrs. Sofia Morales, Angelle’s mother and primary caregiver. All interventions adhered to NAEYC’s Position Statement on Developmentally Appropriate Practice and IDEA Part C requirements.

Standardized tool administration dates and scores are documented in Angelle’s Individualized Family Service Plan (IFSP), updated April 18, 2024. Progress summaries are shared with family biweekly via encrypted email and printed handouts. No proprietary curricula were used—only evidence-informed, publicly available strategies aligned with Zero to Three’s Key to Caregiving framework.

Angelle’s laugh is loud and frequent—especially during bubble play and when her grandmother sings “La Víbora de la Mar.” She prefers green grapes over red, insists on wearing striped socks, and cries when her favorite stuffed rabbit is misplaced. She is, in every measurable and immeasurable way, a 28-month-old child—learning, connecting, and growing at her own pace, with the right supports in place.

This profile offers no universal prescriptions. Every child is unique. But Angelle’s data—her words gained, her tantrums softened, her trust deepened—provides concrete evidence that responsive, collaborative, sensory-aware, language-rich care changes developmental trajectories. Not overnight. Not perfectly. But steadily, surely, and with profound respect for who she already is.

Her story continues. And so does ours—as educators, clinicians, and caregivers—committed to seeing, hearing, and supporting children exactly as they are, while holding space for all they will become.

Rachel Kim

Rachel Kim

Board-certified OB-GYN and maternal-fetal medicine specialist. Guides parents through pregnancy, birth planning, and postpartum recovery.