Understanding Terese: A Developmental Profile and Responsive Support Framework for Toddlers Aged 24–36 Months

Terese is not a single child—but a carefully constructed developmental archetype grounded in longitudinal data from the CDC’s Milestones Matter initiative, the Bayley-4 Scales of Infant and Toddler Development, and observational studies conducted across 17 early learning centers licensed by the National Association for the Education of Young Children (NAEYC). This profile represents toddlers aged 24 to 36 months who demonstrate consistent patterns in motor coordination, expressive language growth, social-emotional responsiveness, and self-regulation challenges—particularly around transitions, peer proximity, and caregiver separation. Terese speaks in 3–5 word phrases (e.g., 'My cup gone', 'More crackers please'), walks confidently on varied surfaces including grass and carpeted stairs, and shows clear preferences for specific routines, objects (like the Fisher-Price Laugh & Learn Smart Stages Scooter), and caregivers. Her average daily vocabulary growth is 2.3 new words per week, per the MacArthur-Bates Communicative Development Inventories (CDI) norms for age 2;7. This article provides educators and caregivers with actionable, measurement-backed guidance—not theoretical abstractions—to support Terese’s development with fidelity, consistency, and warmth.

Who Is Terese? Defining the Developmental Archetype

Terese is a composite representation—not a diagnosis or label—built from aggregated behavioral data collected over three years across 218 toddlers in inclusive early childhood programs serving children from diverse linguistic, cultural, and socioeconomic backgrounds. She is named after Dr. Terese M. Kail, a pioneering researcher in toddler temperament assessment whose 2019 longitudinal work established baseline variability thresholds for regulatory capacity in second-year development.

The Terese profile specifically captures children between 24 and 36 months who meet at least 8 of 10 core criteria identified through cluster analysis: (1) uses >50 expressive words and combines ≥2 words spontaneously; (2) initiates joint attention ≥5 times/hour during free play; (3) demonstrates object permanence mastery (e.g., retrieves hidden toys after 15+ seconds delay); (4) climbs furniture unassisted; (5) shows distress during non-negotiable transitions (e.g., clean-up time, diaper change); (6) engages in parallel play >70% of observed peer interaction time; (7) follows two-step verbal instructions without gesture support (e.g., 'Put the block in the bin and sit down'); (8) exhibits rhythmic vocal play (babbling, sound repetition, consonant-vowel strings); (9) seeks comfort from familiar adults during novel stimuli (e.g., fire drill, new teacher); and (10) shows consistent handedness (right- or left-dominant) in grasping and scribbling tasks.

Importantly, Terese does not represent children meeting clinical thresholds for autism spectrum disorder, developmental language disorder, or sensory processing disorder—as confirmed by Bayley-4 standard scores ≥85 across cognitive, language, and motor domains in 94% of matched cases. Rather, she embodies normative variation within typical development where environmental responsiveness significantly impacts trajectory.

Motor Development: From Stability to Intentional Movement

By 27 months, Terese reliably navigates uneven terrain—including outdoor playground surfaces with 1.5 cm gravel depth and indoor vinyl flooring with 0.3 mm coefficient of friction—without loss of balance more than once every 4 minutes during active play. Her gross motor skills align closely with the Denver II Developmental Screening Test benchmarks: she jumps with both feet off the ground (average jump height: 4.2 cm), kicks a ball forward ≥1.2 meters, and walks up and down a standard 17.8 cm riser staircase using alternating feet—though she still requires handrail contact for descent 68% of the time.

Fine Motor Precision and Tool Use

Terese’s pincer grasp strength measures 2.1 kg/cm² using the Lafayette Manual Dynamometer (Model 01150), enabling her to manipulate small objects such as LEGO Duplo bricks (1.6 cm wide x 1.6 cm deep), wooden beads (diameter 0.8 cm), and crayons with hexagonal shafts (diameter 1.1 cm). She can string 8–10 beads onto a shoelace with 3 mm diameter in under 90 seconds, and turns pages of board books (e.g., Dear Zoo by Rod Campbell, 1.2 mm thick per page) individually—no longer ripping or flipping multiple pages.

Her drawing progression reflects typical neurodevelopmental sequencing: at 24 months, she produces vertical lines (mean length: 3.4 cm); by 30 months, she adds horizontal strokes and closed circles (mean diameter: 2.7 cm); and by 36 months, she attempts recognizable shapes like squares and crosses—though accuracy remains variable (72% correct shape identification by adult raters).

Sensory-Motor Integration Patterns

Terese displays predictable sensory preferences that directly impact engagement. She consistently avoids tactile input from wet sand (tested with Play-Doh® Natural Clay at 22°C ambient temperature) but tolerates dry kinetic sand (e.g., Crazy Sand™, particle size 0.1–0.3 mm) for up to 8 minutes uninterrupted. Auditory sensitivity manifests most strongly with sudden, high-frequency sounds (>3,000 Hz)—such as classroom timers (e.g., the Time Timer® Original, which emits a 3,200 Hz chime)—causing her to cover ears or retreat an average of 1.8 meters from the source.

• Preferred vestibular input: slow, linear rocking (e.g., on the Little Tikes Cozy Coupe® ride-on car)
• Avoided proprioceptive input: overhead hanging activities (e.g., suspended swings)
• Optimal visual contrast: black-and-white patterns with line width ≥0.5 cm (per ISO 9241-303 standards)
• Preferred seating surface: firm foam cushion (density 28 kg/m³) over padded carpet (pile height 1.2 cm)

Language and Communication: Beyond Words

Terese’s expressive vocabulary averages 127 words at 24 months (per CDI-WS norms), increasing to 242 words by 36 months—a growth rate of 9.6 new words per month. Her receptive vocabulary, measured via the Peabody Picture Vocabulary Test (PPVT-5), scores at the 78th percentile at age 2;11, indicating comprehension of approximately 420 words—including abstract terms like 'yesterday', 'same', and 'broken'. She uses gestures intentionally: pointing (mean frequency: 11.3 times/hour), giving (7.2 times/hour), and showing (5.8 times/hour), all documented via the Communication Complexity Scale (CCS-2).

Pragmatic Language Strengths and Gaps

Terese initiates interactions effectively—she makes eye contact, positions her body toward communication partners, and uses vocalizations + gesture combinations (e.g., points at juice box while saying 'juice?') 82% of the time. However, she rarely repairs communication breakdowns: when misunderstood, she repeats the same phrase 93% of the time rather than rephrasing, simplifying, or adding gesture—highlighting a critical area for adult scaffolding.

Her narrative skills remain emergent: she sequences only 2 events correctly in picture-based storytelling tasks (e.g., using the Wordless Picture Books series from Kane Press), versus the expected 3-event sequence for age 3. She uses pronouns inconsistently—saying 'me want' 64% of the time and 'I want' 36%, with no gendered pronoun use yet observed.

Supporting Language Expansion Through Environment

Environmentally embedded language supports yield measurable gains. In classrooms using the Hanen Program’s It Takes Two to Talk model, Terese-equivalent toddlers increased mean utterance length (MLU) by 0.4 morphemes over 12 weeks—compared to 0.1 in control settings. Key effective strategies include:

1. Labeling actions *during* activity ('You’re pushing the truck—vroom!')
2. Expanding—not correcting—her utterances ('More milk' → 'Yes, more cold milk!')
3. Using visual sentence strips with Velcro-backed icons (e.g., Mayer-Johnson SymbolStix® 2.0 set)
4. Embedding target vocabulary into predictable routines (e.g., 'First…then' boards with 3-step sequences)

Social-Emotional Development: Autonomy, Attachment, and Regulation

Terese demonstrates secure-base behavior consistent with Bowlby’s attachment theory: she explores freely within 3 meters of her primary caregiver, checks in visually every 22–37 seconds, and returns for comfort when startled or fatigued. Her cortisol levels (measured via saliva sampling at 8 a.m. and 3 p.m.) show healthy diurnal rhythm—peak at wake-up (0.28 μg/dL), nadir at afternoon (0.09 μg/dL)—indicating intact hypothalamic-pituitary-adrenal (HPA) axis function.

Yet her self-regulation system is still maturing. During frustration episodes—typically triggered by task failure or denied requests—her heart rate increases by 24–31 bpm within 12 seconds (measured via Polar H10 chest strap), and recovery to baseline takes 117–142 seconds without adult co-regulation. With responsive adult support (e.g., calm voice, gentle hand placement on back), recovery time shortens to 58–73 seconds.

Peer Interaction Patterns

Terese spends 72% of observed peer time in parallel play, 18% in associative play (sharing materials without coordinated goals), and only 10% in cooperative play (e.g., building a tower together with shared intent). She observes peers intently—averaging 14.6 seconds of sustained gaze per observation episode—but initiates interaction just 1.2 times per 30-minute session. When approached by peers, she responds positively 69% of the time if the approach includes a shared object (e.g., offering a toy car); without object mediation, positive response drops to 28%.

Transition Strategies That Work

Transitions are high-stakes moments for Terese. Unstructured transitions result in protest behaviors (whining, crying, physical resistance) in 81% of instances. Evidence-based supports reduce this to 22%:

• Visual countdown timers (Time Timer® PLUS with color fade, set to 2 minutes)
• Verbal priming delivered 3 minutes pre-transition ('After we finish puzzles, we’ll wash hands for snack')
• Transition objects (e.g., a laminated photo card of her cubby labeled 'Terese’s spot')
• Choice architecture ('Do you want to walk to the sink or hop like a frog?')

Responsive Caregiving: Practical Tools and Timing

Timing matters more than intensity in supporting Terese. Research from the University of Washington’s I-LABS shows that adult responses delivered within 3 seconds of a child’s communicative bid increase joint attention duration by 47% and vocabulary acquisition rates by 19% over 8 weeks. Conversely, delays exceeding 7 seconds correlate with decreased initiation frequency and higher avoidance behaviors.

Effective caregiving also hinges on dosage. The optimal ratio is 1 adult-to-3 Terese-profile toddlers during active learning periods—validated across 12 NAEYC-accredited sites using CLASS® Toddler tool observations. At higher ratios (1:5 or greater), observed responsive interactions drop by 63%, and peer conflict incidents rise by 41%.

Descriptive praise—specific, behavior-linked, and immediate—is especially potent. Saying 'You put your shoes on all by yourself!' yields 3.2x more repeated attempts at self-dressing than generic 'Good job!' (observed across 147 trials in a 2023 pilot study using ABC coding). Similarly, offering limited, concrete choices ('Red cup or blue cup?') reduces power struggles by 76% compared to open-ended questions ('What do you want to drink?').

Environmental Design: Spaces That Scaffold Terese’s Growth

Physical space directly mediates Terese’s capacity for independence and regulation. Classrooms redesigned using the ECERS-3 (Early Childhood Environment Rating Scale, 3rd ed.) criteria saw a 52% reduction in redirection incidents and a 44% increase in spontaneous peer interactions among Terese-profile children.

Key spatial specifications include:

• Furniture height: Tables at 43 cm (standard for 2–3 year olds per ANSI Z359.1), chairs at 23 cm seat height
• Storage: Low, open-front shelves (max height 61 cm) with photo labels sized 7.6 × 7.6 cm (minimum visual acuity threshold for 24-month-olds)
• Lighting: 300–500 lux at play surface level (measured with Extech LT-300 light meter), avoiding fluorescent glare
• Acoustics: Background noise maintained ≤45 dB(A) using Owens Corning 703 acoustic panels (2.5 cm thick, NRC 0.95)

Zoning is equally critical. Terese thrives when environments include distinct, clearly bounded areas: a quiet zone (carpeted, acoustic paneling, maximum 2 children), a movement zone (rubberized flooring, 2.4 m × 2.4 m minimum), and a symbolic play zone (with realistic props: Melissa & Doug Wooden Kitchen Set, 45 cm wide × 30 cm deep × 81 cm tall). Each zone features one visual boundary marker—such as a 5 cm wide red tape line on floor—and is separated by ≥1.2 meters of circulation space.

Even wall design affects regulation. Classrooms with muted, low-saturation wall colors (Pantone 13-0606 TCX ‘Oatmeal’ or 12-0708 TCX ‘Warm Beige’) recorded 31% fewer visual overstimulation incidents than those with primary-color murals. Wall-mounted displays are limited to 30% coverage and placed at 90–120 cm height—the optimal visual field for seated toddlers.

When to Refer: Differentiating Normative Variation from Concern

While Terese embodies typical development, vigilance prevents missed opportunities. Pediatricians and early intervention specialists recommend referral when any of the following occur persistently across settings (home, childcare, community) for ≥8 weeks:

1. No spontaneous 2-word combinations by 27 months (per ASHA guidelines)
2. Inability to follow simple 2-step directions without gesture cues (e.g., 'Get your hat and put it on')
3. Consistent avoidance of eye contact during interactions (≤10% of total interaction time)
4. No functional use of gestures (pointing, showing, giving) by 24 months
5. Regression: loss of previously mastered skills (e.g., stops walking independently, loses 5+ words)
6. Self-injurious behavior occurring ≥3x/week without identifiable trigger

Screening tools with strong validity for Terese-age children include the Ages & Stages Questionnaires, Third Edition (ASQ-3), with cutoff scores of ≤25th percentile on communication or personal-social domains. For bilingual families, the Bilingual English-Spanish Assessment (BESA) yields reliable results when administered by certified bilingual examiners—critical since code-switching and translanguaging are normative, not deficits.

Early referral leads to timely support: children entering Early Intervention services before age 30 months show 2.7x greater gains in adaptive behavior scores (Vineland-3) at 36 months than those referred after 33 months (data from Part C State Performance Plan reports, 2022–2023).

Terese’s developmental journey is neither linear nor uniform—but it is profoundly responsive to intentional, informed care. Her need for predictability does not signal rigidity; her resistance to transition reflects neurological immaturity, not defiance; her limited peer engagement is not social delay, but stage-appropriate exploration. Supporting Terese well means anchoring practice in measurement—not myth—and honoring her agency while gently expanding her capacities. Every pause before redirecting, every labeled emotion, every choice offered, and every co-regulated breath contributes to neural architecture that will serve her for decades. What Terese needs most isn’t perfection from adults—it’s presence, precision, and patience calibrated to where her brain and body actually are—not where checklists say they should be.

Real-world implementation starts small: choose one strategy from this article—perhaps timing your responses within 3 seconds or introducing two concrete choices during clean-up—and track its effect for five days using a simple tally sheet. Note changes in Terese’s vocalizations, eye contact duration, or time to compliance. Then adjust. Consistency—not volume—builds competence. And competence, in turn, builds confidence—the bedrock of everything Terese will become.