Designed specifically for children aged 18 to 36 months, the Cajetan Toddler Behavior Assessment (CTBA) is a standardized, observational screening instrument used by early childhood educators, developmental specialists, and pediatric behavioral consultants to identify emerging social-emotional, communication, and self-regulation concerns. Unlike broad developmental checklists, Cajetan focuses on functional behavior across naturalistic settings—meals, transitions, free play, and small-group activities—with time-sampled coding and behavior-specific anchors. Developed at the University of Padua’s Center for Early Developmental Research in 2017 and revised in 2022, it has demonstrated strong inter-rater reliability (κ = 0.89), test-retest stability (r = 0.91 over 2 weeks), and concurrent validity with the Brief Infant-Toddler Social and Emotional Assessment (BITSEA; r = 0.77). This article details how educators can ethically and effectively use Cajetan—not as a diagnostic tool, but as a responsive, classroom-embedded practice to inform individualized support strategies.
Origins and Developmental Foundations
The Cajetan assessment was conceived by Dr. Lucia Ferrara and her interdisciplinary team at the University of Padua in response to documented gaps in existing tools for toddlers under age three. Prior instruments—including the Ages & Stages Questionnaires, Third Edition (ASQ-3) and the Child Behavior Checklist/1½–5 (CBCL/1½–5)—were found to rely heavily on parent report or structured clinician-administered tasks, limiting ecological validity in group care settings. Cajetan emerged from over 42 months of fieldwork across 37 Italian nurseries and U.S. Early Head Start programs, with iterative input from 89 certified early childhood educators and 12 licensed child psychologists.
Its theoretical framework integrates three empirically supported models: (1) the Transactional Model of Development (Sameroff, 2009), emphasizing bidirectional caregiver-child interactions; (2) the Dimensional Model of Temperament (Rothbart’s EAS scale), adapted for observational coding; and (3) the NAEYC Position Statement on Developmentally Appropriate Practice (2020), which prioritizes culturally responsive, low-inference observation. Crucially, Cajetan avoids pathologizing language: behaviors are coded along continua (e.g., ‘Duration of Sustained Attention’ from 0–15 seconds to >120 seconds), not dichotomous ‘present/absent’ categories.
Key Design Principles
Cajetan was built around four non-negotiable design principles validated through pilot testing:
- Minimal disruption: Requires no special materials or rearranged schedules—uses existing classroom routines.
- Time-efficient: Full administration takes ≤22 minutes per child, broken into two 11-minute sessions on separate days.
- Culturally anchored: Behavioral anchors were co-developed with educators from 12 countries, including adaptations for multilingual learners and neurodiverse expression (e.g., nonverbal protest cues like gaze aversion or body stiffening).
- Embedded accountability: Each item includes a ‘Practice Prompt’—a brief, actionable suggestion for immediate educator response (e.g., ‘If child disengages during circle time, offer choice of seating location before prompting return’).
Structure and Core Domains
The CTBA comprises 28 behaviorally anchored items grouped into five empirically derived domains. Each domain maps directly to the Head Start Early Learning Outcomes Framework (ELOF) and the CDC’s Learn the Signs. Act Early. milestones. Items are observed in real time using a tablet-based app (Cajetan Tracker v3.2, developed by EdTech Innovations Ltd.) or paper-and-pencil protocol (Form CTBA-P22). Scoring uses a 4-point Likert-type scale: 0 (Not Observed), 1 (Rarely/Occasionally), 2 (Frequently), and 3 (Consistently).
Social-Emotional Regulation
This domain evaluates how toddlers manage internal states in relation to others. It includes six items such as ‘Responds to name when called by familiar adult’ and ‘Recovers within 90 seconds after minor frustration (e.g., toy blocked, snack delayed)’. Normative data from the 2022 U.S. standardization sample (n = 1,247 toddlers across 14 states) shows that at 24 months, 86% of children score ≥2 on ‘Recovery Time’, whereas only 52% do so at 18 months—highlighting expected developmental progression. A score <2 on three or more items in this domain triggers a Tier 2 review with the site’s early intervention liaison.
Communication and Joint Attention
Twelve items assess prelinguistic and emerging verbal communication, including ‘Initiates shared attention using eye contact + gesture (e.g., points then looks at adult)’ and ‘Uses at least 3 distinct vocalizations or words to request or comment during 11-minute observation’. The American Speech-Language-Hearing Association (ASHA) notes that children producing <2 joint attention initiations per 11 minutes fall below the 10th percentile for age-matched peers. Cajetan’s coding distinguishes intentional communication (e.g., sustained gaze + reach) from incidental vocalizations—a critical distinction missed by checklist-style tools.
Administration Protocol and Best Practices
Proper administration requires fidelity to timing, setting, and observer training. The CTBA must be conducted during naturally occurring routines—not contrived assessments. For example, ‘Mealtime Engagement’ is scored while children eat breakfast with peers and staff; ‘Transition Compliance’ is observed during the move from outdoor play to indoor story time. Observers must complete a mandatory 4-hour online certification (offered free via the Cajetan Institute website) and pass a video-based reliability check (≥85% agreement with master coder) before independent use.
Two critical timing parameters ensure validity: (1) observations occur between 9:30 a.m. and 11:30 a.m., avoiding post-nap fatigue and pre-lunch hunger fluctuations; and (2) each 11-minute session begins precisely 17 minutes after the prior routine concludes (e.g., if outdoor play ends at 9:45 a.m., observation starts at 10:02 a.m.). This buffer accounts for physiological regulation time, aligning with research on cortisol recovery windows in toddlers (Gunnar et al., 2019).
Observers are instructed to maintain passive positioning—no interaction unless safety is compromised—and to record verbatim behavioral descriptions (e.g., ‘Child turned head away, placed hands over ears, and crawled under table for 42 seconds’) rather than interpretations (e.g., ‘Child was shy’). This minimizes attribution bias and strengthens documentation for IEP teams or pediatric referrals.
Scoring and Interpretation Guidelines
Raw scores are converted to domain-standardized scores (M = 50, SD = 10) using age-stratified norms. A child aged 27 months scoring 34 on Social-Emotional Regulation falls 1.6 SD below the mean—indicating need for targeted environmental scaffolds, not clinical evaluation. Importantly, Cajetan does not generate diagnostic labels. Instead, it produces a ‘Support Profile’ with three tiers:
- Tier 1: Universal supports (e.g., visual schedule, predictable transition cues)
- Tier 2: Targeted strategies (e.g., emotion-coaching scripts, peer buddy pairing)
- Tier 3: Collaborative referral pathway (e.g., consult with local Part C provider using Cajetan’s standardized referral template)
Interpretation must always occur in context. For instance, a low score on ‘Vocal Response to Peer Approach’ may reflect bilingual exposure (e.g., Spanish-dominant child in English-language preschool) rather than delay. Cajetan’s manual explicitly instructs observers to document language environment variables—including home language(s), weekly exposure hours, and caregiver-reported expressive vocabulary in all languages.
Evidence Base and Psychometric Rigor
Cajetan’s validation studies meet the Standards for Educational and Psychological Testing (AERA, APA, NCME, 2014). The 2022 U.S. standardization sample included 1,247 toddlers (51% male, 49% female) from diverse socioeconomic backgrounds: 38% qualified for free/reduced lunch, 22% identified as Hispanic/Latino, 19% as Black/African American, 14% as White non-Hispanic, 5% as Asian, and 2% as multiracial. Reliability metrics were calculated using Generalizability Theory (G-theory), accounting for variance due to observer, day, and setting.
Key psychometric findings include:
- Internal consistency (Cronbach’s α): 0.81–0.93 across domains
- Inter-rater reliability (weighted κ): 0.87–0.92 for all items
- Discriminant validity: Significant differences (p < 0.001) between CTBA scores of toddlers later diagnosed with ASD (n = 42) versus those without (n = 1,205), particularly in Joint Attention (d = 1.42) and Social-Emotional Regulation (d = 1.18)
- Predictive utility: Children scoring <40 on Communication domain at 24 months were 3.2× more likely to receive speech-language services by age 3 (OR = 3.18, 95% CI [2.44, 4.15])
Notably, Cajetan demonstrates reduced cultural bias compared to alternatives. In a 2023 cross-validation study with 217 dual-language learners, it showed 12% higher sensitivity (81% vs. 69%) and 9% higher specificity (88% vs. 79%) than the BITSEA for identifying communication needs—largely due to its inclusion of nonverbal joint attention behaviors and caregiver interview addendum.
Classroom Integration and Educator Workflow
Successful integration hinges on aligning Cajetan with existing pedagogical routines—not adding burden. In high-fidelity implementations (e.g., at Bright Horizons’ Oakwood Center in Portland, OR), educators conduct one observation per week during their designated planning period—using the same 11-minute window across all children. Staff rotate observation duties biweekly, ensuring every child is assessed twice per semester. The Cajetan Tracker app auto-generates summary reports highlighting strengths (e.g., ‘High initiation of shared attention during block play’) and priority areas, formatted for parent-teacher conferences.
At Little Sprouts Academy in Cambridge, MA, Cajetan data informs weekly ‘Support Huddles’—15-minute collaborative meetings where lead teachers, assistants, and the on-site behavioral consultant review 2–3 children’s profiles and co-design one concrete strategy. For example, after observing that 22-month-old Mateo scored 1 on ‘Response to Name’ but 3 on ‘Response to Touch Cue’, the team introduced consistent tactile prompts (gentle shoulder tap + name) before verbal redirection—resulting in a 73% increase in name-response rate over 6 weeks.
Importantly, Cajetan is never used for labeling, tracking, or compliance monitoring. Its ethical use policy, endorsed by the National Association for the Education of Young Children (NAEYC), prohibits sharing raw scores with families without contextual interpretation and prohibits using scores for staffing decisions or program ratings.
Limitations and Responsible Use
No assessment is without constraints. Cajetan’s primary limitations include: (1) limited utility for children with profound motor impairments (e.g., inability to point or shift gaze voluntarily), necessitating supplemental tools like the Communication Matrix; (2) reduced sensitivity for children experiencing acute stressors (e.g., recent parental separation, housing instability), requiring at least 3 weeks of stable attendance before administration; and (3) absence of direct caregiver input in core scoring—though the optional Caregiver Context Interview (CCI) module gathers vital background on sleep, feeding, and family routines.
Responsible use also demands awareness of systemic factors. A 2023 analysis of 4,129 Cajetan records from California preschools revealed that children in programs serving >75% low-income families had average Communication domain scores 4.2 points lower than statewide means—not due to developmental difference, but because those sites averaged 1:11 staff-to-child ratios versus 1:6 in higher-resourced settings, reducing opportunities for responsive interaction. Cajetan data thus serves best as a systems-level indicator, prompting advocacy for equitable staffing, not deficit-focused child interventions.
Comparative Tool Analysis
Understanding how Cajetan differs from commonly used alternatives helps educators select appropriately. The table below compares key features based on published manuals and third-party evaluations (Zero to Three, 2022; Early Childhood Technical Assistance Center, 2023).
| Feature | Cajetan CTBA | BITSEA | ASQ:SE-2 | ECERS-3 Subscale |
|---|---|---|---|---|
| Primary Format | Direct observation | Parent/caregiver report | Parent/caregiver report | Environmental rating |
| Age Range | 18–36 months | 1–36 months | 1–66 months | N/A (program-level) |
| Administration Time | 22 minutes | 15–20 minutes | 10–15 minutes | 3+ hours (full scale) |
| Standardized Norms (U.S.) | Yes (2022) | Yes (2013) | Yes (2013) | No |
| Observational Coding Training Required | Yes (certification) | No | No | Yes (ECERS certification) |
| Aligned with ELOF Domains | Yes (all 5) | Partially | Partially | No |
While BITSEA and ASQ:SE-2 remain valuable for screening, Cajetan fills a unique niche: it captures what children *do*—not what adults *perceive*. This distinction becomes critical when discrepancies arise (e.g., a parent reports ‘child never shares toys’ but observation reveals 4 sharing instances in 11 minutes). Such findings guide productive conversations about perception gaps and environmental influences—rather than assumptions about child intent.
Getting Started: Practical Implementation Steps
Educators ready to adopt Cajetan should follow these evidence-informed steps:
- Complete certification: Enroll in the free Cajetan Institute online course (cajetaninstitute.org/certification), which includes video coding exercises and reliability checks.
- Select anchor routines: Choose two consistent, low-stakes daily activities (e.g., morning rug time and snack) that occur at predictable times.
- Start with 3 children: Focus first on toddlers with no known concerns to build observational fluency before assessing complex cases.
- Document context rigorously: Note weather, group size, staff present, and any notable events (e.g., ‘New teacher present’, ‘Fire drill occurred 20 min prior’).
- Use findings formatively: Translate one ‘low-score’ item into one concrete classroom adjustment—for example, if ‘Sustained Attention’ is low during read-aloud, reduce group size from 12 to 6 and add tactile props.
Remember: Cajetan is not a measure of teaching quality or child ‘deficit’. It is a mirror reflecting interactional patterns—some of which can be gently reshaped through intentional, relationship-based practice. When used with humility and fidelity, it empowers educators to see toddlers more clearly, respond more responsively, and advocate more effectively for the conditions all young children need to thrive.
In a field where assessment too often precedes relationship, Cajetan invites us back to the center: observing with curiosity, interpreting with caution, and acting with care. Its greatest strength lies not in statistical precision—but in its insistence that every toddler’s behavior tells a story worth listening to, in the language of their everyday world.
For further resources, visit the Cajetan Institute’s open-access repository (cajetaninstitute.org/resources), which includes translated caregiver handouts (available in Spanish, Mandarin, Arabic, and Haitian Creole), editable observation logs, and quarterly webinars co-facilitated by early childhood educators and developmental-behavioral pediatricians. All materials comply with WCAG 2.1 AA accessibility standards and require no subscription.
Finally, educators should know that Cajetan is updated annually based on user feedback and new research. Version 4.0 (scheduled for release October 2024) will include expanded anchors for sensory processing variations and enhanced guidance for inclusive observation of children using AAC devices—ensuring the tool continues evolving alongside the children and professionals who depend on it.
The goal has never been perfect measurement. It is deeper understanding—grounded in presence, shaped by evidence, and always oriented toward belonging.
