Early Childhood Behaviour Questionnaire (ECBQ)

1. Abstract

The Early Childhood Behavior Questionnaire (ECBQ) is a comprehensive parent-report psychometric instrument designed to evaluate individual differences in temperament among toddlers aged 16 to 36 months (approximately 1 to 3 years old). Developed by Samuel P. Putnam, Maria A. Gartstein, and Mary K. Rothbart (2006), the ECBQ bridges a critical developmental measurement gap situated between infancy and preschool-age assessments. Rooted in Mary K. Rothbart’s psychobiological framework, the instrument operationalizes temperament as constitutionally based individual differences in reactivity and self-regulation across motor, emotional, and attentional domains. The standard version of the ECBQ comprises 201 items organized into 18 discrete, fine-grained subscales. These 18 primary scales hierarchically map onto three robust, higher-order developmental dimensions: Negative Affectivity, Surgency/Extraversion, and Effortful Control.

Caregivers rate the frequency of specific, concrete toddler behaviors observed within recent, routine daily contexts using a 7-point Likert-type scale ranging from 1 (“Never”) to 7 (“Always”), supplemented by a “Does Not Apply” option. Extensive psychometric testing on normative cohorts reveals strong internal consistency across scales, with Cronbach’s alpha coefficients predominantly exceeding .80. Principal axis factor analyses and confirmatory structural evaluations have consistently demonstrated the replication of its three-factor macrostructure across diverse cultural and linguistic adaptations, including Russian, Japanese, and European cohorts. Inter-rater agreement between primary and secondary caregivers demonstrates substantial cross-informant concordance, and longitudinal analyses establish robust multi-wave stability across toddlerhood. The ECBQ provides researchers and developmental clinicians with a nuanced, empirically validated battery for mapping developmental pathways, self-regulatory emergence, and the transactional etiology of internalizing and externalizing psychological disorders.

2. Keywords

Early Childhood Behavior Questionnaire, ECBQ, toddler temperament, psychometrics, Rothbart temperament framework, Effortful Control, Surgency, Negative Affectivity, behavioral reactivity, parent-report questionnaire

3. Authors

The Early Childhood Behavior Questionnaire was developed through collaborative longitudinal research conducted across multiple academic psychometric and developmental laboratories:

• Samuel P. Putnam, Ph.D. — Professor of Psychology, Department of Psychology, Bowdoin College, Brunswick, Maine, USA. Primary investigator specializing in temperament development from infancy through middle childhood.
• Maria A. Gartstein, Ph.D. — Professor of Psychology, Department of Psychology, Washington State University, Pullman, Washington, USA. Co-developer of the Infant Behavior Questionnaire-Revised (IBQ-R) and expert in infant/toddler socioemotional trajectories.
• Mary Klevjord Rothbart, Ph.D. — Distinguished Professor Emerita of Psychology, Department of Psychology, University of Oregon, Eugene, Oregon, USA. Foundational theorist in developmental temperament, executive attention, and the neurodevelopmental architecture of self-regulation.

Inquiries regarding scale administration, scoring keys, and research licenses are centrally maintained through the Rothbart Temperament Questionnaires Lab at Bowdoin College.

4. Purpose

Prior to the publication of the Early Childhood Behavior Questionnaire, developmental psychology faced a pronounced methodological lacuna. While highly refined, fine-grained caregiver-report instruments existed for infancy—such as the Infant Behavior Questionnaire-Revised (IBQ-R; Gartstein & Rothbart, 2003)—and for children aged 3 to 7 years—most notably the Children’s Behavior Questionnaire (CBQ; Rothbart, Ahadi, Hershey, & Fisher, 2001)—the developmental interval of toddlerhood (ages 1 to 3 years) lacked an equivalent multidimensional measurement tool. Existing measures appropriate for this transition, such as the Toddler Behavior Assessment Questionnaire (TBAQ; Goldsmith, 1996), operationalized temperament primarily in terms of emotional distress and motoric activity, omitting emerging self-regulatory capacities.

The ECBQ was systematically designed to resolve this gap by constructing an upward extension of the IBQ-R and a downward extension of the CBQ. Its fundamental purpose is to measure toddler temperament with fine-grained specificity, delineating how biologically rooted emotional, attentional, and motor response tendencies interact with environmental stimuli. Crucially, the ECBQ expands beyond rudimentary emotional reactivity to evaluate the ontogenetic emergence of effortful control—the voluntary modulation of attentional allocation and behavioral inhibition that emerges vigorously during the second and third years of life.

In academic research, the ECBQ serves as an indispensable tool for investigating normative developmental trajectories, individual differences in executive function, neuroendocrine reactivity, and the transactional mechanisms underlying parent-child attachment. In applied and developmental research contexts, the questionnaire facilitates the early identification of temperamental vulnerability markers. For instance, heightened levels of temperamental fear and sadness, coupled with low attentional control, consistently operate as precursors to internalizing difficulties (such as childhood anxiety and depressive manifestations), whereas excessive motor activation, high impulsivity, and compromised inhibitory control forecast externalizing trajectories, including oppositional defiant behaviors and early attentional deficits.

5. Psychological Construct

The ECBQ operationalizes temperament through 18 distinct, primary behavioral subscales that hierarchically converge into three superordinate dimensions. Each construct is defined through contextualized behavioral manifestations observed in naturalistic environments:

Broad Dimension 1: Negative Affectivity

Negative Affectivity reflects general distress prone reactivity, negative emotional tone, somatic discomfort, and neurosensory sensitivity. It encompasses eight differentiated subscales:

• Discomfort: The expression of negative affect, distress, or irritability elicited by subtle sensory physical attributes of the environment, including tactile, visual, auditory, or temperature variations (e.g., crying or complaining when clothes feel scratchy or shoes feel tight).
• Fear: Negative emotional reactions, withdrawal, or behavioral hesitation elicited by novel, intense, sudden, or potentially threatening situations, objects, or persons (e.g., retreating behind a parent when encountering an unfamiliar large dog or a loud mechanical toy).
• Sadness: Manifestations of dejection, lowered mood, tearfulness, or behavioral lethargy following disappointment, loss of a desired object, or perceived separation from a caregiver (e.g., crying quietly or sighing repeatedly when a favorite toy breaks).
• Frustration: Negative emotional reactivity, protest, or behavioral disruption triggered when ongoing goal-directed behavior is interrupted, blocked, or altered (e.g., screaming, stamping feet, or throwing an item when prohibited from touching a delicate object).
• Soothability (Reverse-Coded in Dimension): The toddler’s capacity to recover from distress, emotional agitation, or crying following soothing techniques or parental comforting interventions (e.g., calming down quickly when cuddled, spoken to softly, or redirected).
• Motor Activation: Rapid, repetitive, or unconstrained motoric discharge occurring in response to emotional stimulation, frustration, or anticipation (e.g., clenching fists, kicking legs, or flailing arms during states of excitement or distress).
• Perceptual Sensitivity: The toddler’s heightened detection or behavioral awareness of low-intensity sensory stimuli within the surrounding environment (e.g., noticing distant sirens, clock ticking, faint odors, or slight changes in room decor).
• Shyness: Behavioral inhibition, social withdrawal, vocal suppression, or avoidance displayed in the presence of unfamiliar adults, peers, or novel social dynamics (e.g., clinging to a parent’s leg or refusing to speak when greeted by unfamiliar visitors).

Broad Dimension 2: Surgency / Extraversion

Surgency reflects high approach tendencies, positive emotional tone, behavioral speed, and reward anticipation. It consists of five subscales:

• Activity Level: The overall frequency, pace, and vigor of gross motor movements displayed during awake hours (e.g., running rather than walking, climbing on furniture, or remaining constantly in physical motion).
• High-Intensity Pleasure: The experience of positive affect, pleasure, laughter, or exuberance elicited by intense, rapid, novel, or high-energy physical activities (e.g., gleeful shouting during rough-and-tumble play, swinging high, or spinning rapidly).
• Impulsivity: The latency and speed with which behavioral approach is initiated following the presentation of an attractive object or novel stimulus, reflecting immediate, non-deliberative execution (e.g., instantly grabbing forbidden objects before looking to a caregiver).
• Positive Anticipation: Exuberant, highly positive emotional arousal, excitement, or approach directed toward expected pleasurable activities, events, or rewards (e.g., clapping, bouncing, and laughing enthusiastically when told an outing to the park is about to occur).
• Sociability: Positive vocalization, social seeking, open approach, and pleasurable engagement directed toward familiar or unfamiliar peers and adults (e.g., actively greeting others, waving, or initiating joint social play).

Broad Dimension 3: Effortful Control

Effortful Control reflects the nascent executive capacity to voluntarily inhibit a dominant response in order to execute a subdominant response, maintain focal attention, and self-regulate sensory-affective arousal. It is operationalized through five subscales:

• Attention Focusing: The ability to sustain attentional engagement on a single task, object, or play activity without succumbing to external distractions (e.g., meticulously working on a shape sorter or coloring for extended periods without looking away).
• Attention Shifting: The flexible regulatory capacity to intentionally disengage and re-orient attentional focus from one activity, stimulus, or emotional state to another (e.g., seamlessly moving from building blocks to sitting down for a snack when prompted).
• Cuddliness: The toddler’s positive behavioral responsiveness, tactile seeking, and physical relaxation when held, embraced, or comforted by a caregiver (e.g., molding comfortably into a parent’s lap while being read a story).
• Inhibitory Control: The capacity to plan, initiate, and suppress motoric or verbal actions in response to parental commands or social rules (e.g., stopping immediately when told “stop” or refraining from touching an electrical outlet when instructed).
• Low-Intensity Pleasure: The manifestation of calm enjoyment, quiet happiness, or content satisfaction elicited by low-stimulus, gentle, or peaceful activities (e.g., peacefully watching ripples in water, listening quietly to a gentle song, or looking out a window).

6. Theoretical Framework

The Early Childhood Behavior Questionnaire is firmly anchored within the psychobiological model of temperament developed by Mary K. Rothbart and colleagues (e.g., Rothbart & Derryberry, 1981; Rothbart et al., 2001). Within this theoretical paradigm, temperament is defined as constitutionally based individual differences in reactivity and self-regulation, influenced over time by heredity, maturation, and experience.

The term “constitutional” specifies that temperament features a biological substrate rooted in neurochemical, neuroendocrine, and genetic mechanisms, while remaining structurally malleable and dynamic in response to environmental transactions and neurological maturation. Rothbart’s model decomposes temperamental architecture into two intertwined, functional subsystems:

1. Reactivity: The biological excitability, latency, threshold, intensity, and rise/recovery time of physiological, neuroendocrine, autonomic, motor, and affective systems to internal and external stimulation. In the ECBQ, reactivity is represented across positive/approach modalities (Surgency) and distress/defense modalities (Negative Affectivity).
2. Self-Regulation: The neural, cognitive, and behavioral processes that serve to modulate, dampen, enhance, or redirect constitutional reactivity. In toddlerhood, this is embodied in the progressive maturation of Effortful Control.

From a neurodevelopmental perspective, the theoretical construct of Effortful Control corresponds directly to the functional maturation of the anterior executive attention network, which involves the anterior cingulate cortex (ACC), the prefrontal cortex, and interconnected basal ganglia circuits (Posner & Rothbart, 2000). While early infancy is predominantly governed by the orienting attention network and subcortical limbic structures (underpinning basic reactivity, fear, and orienting), the toddler years represent an evolutionary window characterized by rapid synaptogenesis and myelination within the prefrontal regions. Consequently, the ECBQ is theoretically tailored to document this precise developmental epoch, capturing the shift from exogenous, reflex-driven behavioral patterns to endogenous, volitional regulatory mechanisms.

7. Validity

The construct, convergent, discriminant, and cross-cultural validity of the ECBQ have been rigorously substantiated across independent clinical and developmental psychometric investigations.

Construct and Structural Validity

During its initial scale development, Putnam, Gartstein, and Rothbart (2006) conducted comprehensive principal axis factoring that clearly extracted three robust, interpretable broad dimensions matching Rothbart’s theoretical paradigm. Cross-age stability across cross-sectional age cohorts (18, 24, 30, and 36 months) demonstrated that the developmental constructs remain coherent across toddlerhood. Structural consistency has been replicated across various linguistic and cultural adaptations. For instance, Sukigara, Nakagawa, and Mizuno (2015) confirmed the tripartite structural invariant of the Japanese version of the ECBQ across both cross-sectional and longitudinal cohorts, and Slobodskaya and Kozlova (2016) demonstrated structural robustness in a large Russian cohort.

Convergent and Discriminant Validity

Convergent validity has been established by correlating ECBQ dimensions with legacy temperament measures and standardized observational protocols. In the initial validation cohorts (Putnam et al., 2006), ECBQ scales derived from the Toddler Behavior Assessment Questionnaire (TBAQ)—such as Activity Level, Frustration (Anger), and Fear (Social Fear)—demonstrated substantial convergence with the parent TBAQ scales (correlations ranging from .65 to .82), demonstrating that the newly constructed scales successfully captured the intended behavioral criteria. Furthermore, longitudinal assessments linking the Infant Behavior Questionnaire-Revised (IBQ-R) at 12 months with the ECBQ at 18 to 36 months confirmed that infant reactive distress mapped onto toddler Negative Affectivity, infant smiling/laughter predicted toddler Surgency, and early infant duration of orienting robustly predicted early childhood Effortful Control.

To eliminate shared-method variance inherent in questionnaire-only designs, multiple studies have validated the ECBQ against laboratory-based behavioral tasks using the Laboratory Temperament Assessment Battery (Lab-TAB). Toddler Effortful Control scores on the ECBQ (specifically Inhibitory Control and Attention Focusing) correlate significantly with laboratory behavioral batteries requiring delayed gratification, whisper tasks, and spatial tower-building under restrictive rules (Putnam et al., 2006; Kochanska, Murray, & Harlan, 2000). Similarly, ECBQ Fear and Shyness subscales correlate strongly with observed behavioral freezing, latency to approach novel physical stimuli, and vocal inhibition in structured laboratory observation paradigms.

Predictive Validity

The ECBQ demonstrates pronounced predictive utility for later developmental and socioemotional outcomes. Slobodskaya and Kozlova (2016) demonstrated that early childhood ECBQ dimensions systematically predicted Big Five personality traits in middle childhood: Effortful Control predicted later Conscientiousness, Surgency predicted Extraversion, and Negative Affectivity was an early developmental antecedent of Neuroticism. In clinical and developmental risk paradigms, elevated Negative Affectivity combined with deficits in Effortful Control on the ECBQ prospectively predicts higher internalizing symptoms (separation anxiety, somatic complaints), while low Effortful Control coupled with elevated Surgency (particularly Impulsivity) significantly forecasts externalizing behavioral disruptions, peer aggression, and conduct problems at ages 4 to 6.

8. Reliability

The psychometric reliability of the Early Childhood Behavior Questionnaire has been extensively confirmed across internal consistency, inter-rater concordance, and multi-interval longitudinal stability metrics:

Internal Consistency

In the foundational psychometric investigations by Putnam, Gartstein, and Rothbart (2006), internal consistency was examined across two large independent cohorts consisting of multiple age tranches (18, 24, 30, and 36 months). Across 72 independently calculated Cronbach’s alpha coefficients for Sample 2 (the final 201-item version), 37 alphas exceeded .80, indicating high internal consistency. An additional 30 alphas ranged comfortably between .70 and .79. Only five scale iterations yielded coefficients slightly below .70, with only one single subscale measurement (Impulsivity assessed specifically at the 18-month timepoint) dropping marginally below .60 (α = .58), an expected developmental artifact due to the emergence of deliberate motor planning at this very young age. Overall scale reliability averages approximately .81 across dimensions, demonstrating strong internal item cohesion.

Inter-Rater Reliability

Concordance between primary caregivers (predominantly mothers) and secondary caregivers (predominantly fathers) was systematically evaluated to assess cross-informant reliability (Putnam et al., 2006). Statistically significant positive correlations were established across the vast majority of the 18 subscales. The highest inter-rater agreement was observed for discrete, overt dimensions of Negative Affectivity, such as Fear (r ≈ .62) and Frustration (r ≈ .58). Lower, though statistically significant, agreement emerged on more subtle, context-dependent behaviors such as Low-Intensity Pleasure, Sociability, Motor Activation, Attention Shifting, and Positive Anticipation (with coefficients ranging from .30 to .45), reflecting differential parent-child interactive contexts and situational variance.

Longitudinal and Test-Retest Stability

Longitudinal stability analyses conducted across 6-month, 12-month, and 18-month intervals reveal remarkable developmental stability across toddlerhood. With the exception of the 18-to-36-month trajectory for Positive Anticipation, all longitudinal stability correlations for primary caregivers across the 18-, 24-, 30-, and 36-month assessment waves were statistically significant at p < .01 (Putnam et al., 2006). Test-retest stability coefficients over 6-month intervals (e.g., 18 to 24 months, 24 to 30 months) consistently yielded moderate-to-high correlations (typically ranging from .50 to .75), demonstrating that while individual toddler temperament manifests predictable developmental expansion, individual rank-order stability remains robust throughout the second and third years of life.

9. Factor Analysis

The underlying factor structure of the ECBQ was initially identified and replicated through exploratory and confirmatory factor analytic procedures detailed by Putnam, Gartstein, and Rothbart (2006).

Initial Exploratory Factor Analysis (EFA)

A Principal Axis Factoring (PAF) extraction method accompanied by oblique (Promax) and orthogonal (Varimax) rotations was performed on scale scores across the initial development sample and replicated on the cross-sectional/longitudinal final validation cohort. Inspection of scree plots, eigenvalues-greater-than-one criteria, and conceptual interpretability yielded a robust, invariant three-factor solution that accounted for the majority of the common variance across the 18 primary subscales:

Confirmatory Factor Analysis (CFA) and Cross-National Replications

Subsequent international psychometric studies have tested the stability of this three-factor model using Confirmatory Factor Analysis (CFA) and Structural Equation Modeling (SEM). Sukigara et al. (2015) administered the Japanese ECBQ to 450 mothers of toddlers aged 18 to 36 months. CFA models testing the hierarchical three-factor specification yielded satisfactory goodness-of-fit indices (Comparative Fit Index [CFI] > .90, Root Mean Square Error of Approximation [RMSEA] ≤ .06), confirming that the latent tripartite organization transcended Western cultural boundaries.

Similarly, Slobodskaya and Kozlova (2016) subjected Russian adaptations to factor extraction, successfully recovering identical loadings where Discomfort, Fear, and Sadness loaded cleanly onto Negative Affectivity; Impulsivity and Activity loaded onto Surgency; and Inhibitory Control and Attention Focusing loaded onto Effortful Control. Across all international analytic trials, intercorrelations between the three overarching factors remained modest to moderate (typically |r| < .30), confirming that Negative Affectivity, Surgency, and Effortful Control represent functionally independent constructs within early neurodevelopment.

10. Instrument / Measurement Tool

The structural and administrative parameters of the Early Childhood Behavior Questionnaire (Standard Form) are detailed below:

• Formal Tool Title: Early Childhood Behavior Questionnaire (ECBQ)
• Acronym: ECBQ
• Authors / Developers: Samuel P. Putnam, Maria A. Gartstein, and Mary K. Rothbart (2006)
• Target Population / Age Range: Toddlers aged 16 to 36 months (1.3 to 3.0 years)
• Respondent / Informant: Primary caregiver (mother, father, legal guardian) with daily, intimate observational contact with the child
• Total Number of Items: 201 items (Standard Full Form); abbreviated Short and Very Short Forms have been developed independently for large-scale epidemiological screenings
• Number of Primary Subscales: 18 discrete scales: Activity Level, Attention Focusing, Attention Shifting, Cuddliness, Discomfort, Fear, Frustration, High-Intensity Pleasure, Impulsivity, Inhibitory Control, Low-Intensity Pleasure, Motor Activation, Perceptual Sensitivity, Positive Anticipation, Sadness, Shyness, Sociability, and Soothability
• Higher-Order Dimensions: 3 broad macro-factors (Negative Affectivity, Surgency/Extraversion, Effortful Control)
• Item Presentation Format: Highly contextualized, concrete behavioral descriptors embedded in typical domestic scenarios occurring within the preceding 1 to 2 weeks (e.g., “When told ‘no’, how often did your child…”; “During daily bath time, how often did your child…”)
• Response Scale: 7-point Likert-type frequency rating format:
  • 1 = Never
  • 2 = Very Rarely
  • 3 = Less Than Half the Time
  • 4 = About Half the Time
  • 5 = More Than Half the Time
  • 6 = Almost Always
  • 7 = Always
  • NA = Does Not Apply (used when the child has not been observed in the specific situation within the specified timeframe)
• Administration Modality: Paper-and-pencil self-administered questionnaire or secure computer-assisted digital web survey
• Estimated Completion Time: Approximately 45 to 60 minutes for the standard 201-item form
• Scoring Procedure: Scale scores are calculated by summing item values and dividing by the total number of non-missing items answered (excluding “Does Not Apply” entries), yielding mean continuous scores ranging from 1.00 to 7.00. Negatively keyed items are reverse-scored prior to aggregation.

11. Permissions & Fee and Test Year

• Year of Formal Publication: 2006 (initial longitudinal validation published in Infant Behavior and Development).
• Copyright & Intellectual Property: © 2006 Samuel P. Putnam, Maria A. Gartstein, and Mary K. Rothbart. All rights reserved.
• Accessibility & Distribution Fee: The Early Childhood Behavior Questionnaire is provided free of charge for non-commercial academic research and clinical training purposes. The authors and Bowdoin College do not levy commercial per-copy usage fees for scientific research.
• Licensing and Request Procedure: Researchers must complete an automated formal permission request form prior to acquiring the questionnaire, scoring keys, and electronic scoring macros. Forms, administrative manuals, and international translated versions can be formally requested through the official Rothbart Temperament Questionnaires Portal hosted by Bowdoin College.
• Clinical and Diagnostic Disclaimer: The ECBQ was developed to capture normative, individual variation in behavioral and self-regulatory development. It is not a standardized clinical diagnostic test and is not normed for the independent, standalone diagnosis of psychiatric or neurological pathologies without comprehensive multi-method developmental evaluation.

12. References

Gartstein, M. A., & Rothbart, M. K. (2003). Studying infant temperament via the Revised Infant Behavior Questionnaire. Infant Behavior and Development, 26(1), 64–86. https://doi.org/10.1016/S0163-6383(02)00169-8

Goldsmith, H. H. (1996). Studying temperament via construction of the Toddler Behavior Assessment Questionnaire. Child Development, 67(1), 218–235. https://doi.org/10.1111/j.1467-8624.1996.tb01730.x

Kochanska, G., Murray, K. T., & Harlan, E. T. (2000). Effortful control in early childhood: Continuity and change, antecedents, and implications for social development. Developmental Psychology, 36(2), 220–232. https://doi.org/10.1037/0012-1649.36.2.220

Posner, M. I., & Rothbart, M. K. (2000). Developing mechanisms of self-regulation. Development and Psychopathology, 12(3), 427–441. https://doi.org/10.1017/s0954579400003096

Putnam, S. P., Gartstein, M. A., & Rothbart, M. K. (2006). Measurement of fine-grained aspects of toddler temperament: The Early Childhood Behavior Questionnaire. Infant Behavior and Development, 29(3), 386–401. https://doi.org/10.1016/j.infbeh.2006.01.004

Rothbart, M. K., Ahadi, S. A., Hershey, K. L., & Fisher, P. (2001). Investigations of temperament at three to seven years: The Children’s Behavior Questionnaire. Child Development, 72(5), 1394–1408. https://doi.org/10.1111/1467-8624.00355

Rothbart, M. K., & Derryberry, D. (1981). Development of individual differences in temperament. In M. E. Lamb & A. L. Brown (Eds.), Advances in developmental psychology (Vol. 1, pp. 37–86). Lawrence Erlbaum Associates.

Slobodskaya, H. R., & Kozlova, E. A. (2016). Early temperament as a predictor of later personality. Personality and Individual Differences, 99, 127–132. https://doi.org/10.1016/j.paid.2016.04.094

Sukigara, M., Nakagawa, A., & Mizuno, R. (2015). Development of a Japanese version of the Early Childhood Behavior Questionnaire (ECBQ) using cross-sectional and longitudinal data. SAGE Open, 5(3), 1–11. https://doi.org/10.1177/2158244015590443

13. Items of the Scale