Children’s Empathy Quotient and Systemizing Quotient – Parent version

1. Abstract

The Children’s Empathy Quotient and Systemizing Quotient – Parent version (EQ-SQ Child) is a psychometric parent-report questionnaire developed by Dr. Bonnie Auyeung and colleagues (2009) at the Autism Research Centre, University of Cambridge. Designed to assess two foundational cognitive and behavioral domains—empathy and systemizing—in children aged 4 to 11 years, the instrument translates Simon Baron-Cohen’s adult Empathizing-Systemizing (E-S) theoretical model into a developmentally appropriate observer-rating framework. Comprising 55 items, the instrument yields two primary continuous subscale scores: the Empathy Quotient (EQ-Child, 27 items) and the Systemizing Quotient (SQ-Child, 28 items), utilizing a 4-point response format scored dichotomously or semi-polytomously (0-1-2). Psychometric investigations across large normative school-age cohorts and clinical pediatric samples with autism spectrum conditions (ASC) demonstrate robust internal consistency (Cronbach’s α typically ranging between .82 and .89 for EQ, and .77 to .84 for SQ) and satisfactory test-retest stability across multiple developmental windows. Factor analytic evaluations substantiate a clear two-dimensional architecture reflecting social-communicative sensitivity versus non-social, rule-governed mechanistic orientation. The EQ-SQ Child serves as an indispensable dimensional metric for examining normative neurodevelopmental sexual dimorphism, quantifying extreme cognitive profiles, and assisting in the dimensional screening and deep clinical phenotyping of neurodevelopmental variations.

2. Keywords

Empathy Quotient, Systemizing Quotient, EQ-SQ Child, Autism Spectrum Conditions, Empathizing-Systemizing Theory, Theory of Mind, Parent-Report Questionnaire, Psychometrics, Cognitive Phenotype, Sexual Dimorphism, Neurodevelopment

3. Authors

The Children’s Empathy Quotient and Systemizing Quotient – Parent version was formulated and psychometrically validated by a multidisciplinary research team based at the Autism Research Centre (ARC), Department of Psychiatry, University of Cambridge, United Kingdom:

• Bonnie Auyeung, Ph.D. — Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK; and Department of Psychology, School of Philosophy, Psychology and Language Sciences, The University of Edinburgh, Edinburgh, UK.
• Sally Wheelwright, M.A. — Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK.
• Carrie Allison, Ph.D. — Director of Strategy, Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK.
• Matthew Atkinson, B.Sc. — Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK.
• Noriko Samarawickrema, M.Sc. — Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK.
• Simon Baron-Cohen, Ph.D., FBA, FMedSci — Director of the Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK; and Fellow of Trinity College, Cambridge.

4. Purpose

The primary purpose of the Children’s Empathy Quotient and Systemizing Quotient – Parent version (EQ-SQ Child) is to measure two independent cognitive and psychological constructs across middle childhood: empathizing (the drive to identify mental states, predict behavior, and experience an appropriate emotional response) and systemizing (the drive to analyze rule-governed systems, predict outcomes, and construct rule-based frameworks). While adult self-report versions (Baron-Cohen & Wheelwright, 2004; Baron-Cohen et al., 2003) proved highly influential in delineating cognitive profiles in adults, younger children lack the metacognitive introspection, reading literacy, and self-evaluative capacity required for valid self-administered assessment. The parent-report EQ-SQ Child bridges this developmental gap by tapping into ecological parental observations of everyday behavioral manifestations.

Clinically, the instrument functions as an informative phenotypic screening tool. Rather than treating autism spectrum conditions as categorical psychopathological entities, the EQ-SQ Child enables researchers and clinicians to capture the dimensional brain profile of each child. Under the Extreme Male Brain (EMB) theory of autism, individuals on the spectrum show a significant discrepancy between lower-than-average empathizing and intact or hyper-developed systemizing. Clinicians deploy the scale alongside instruments such as the Childhood Autism Spectrum Test (CAST) and the Social Responsiveness Scale (SRS) to systematically assess how social-interaction difficulties co-occur with circumscribed interests, structural routines, and mechanical fascinations.

In pediatric research, the EQ-SQ Child provides empirical operationalization for investigations tracking prenatal neurodevelopmental markers. It has served as a central phenotypic outcome measure in longitudinal studies tracking the effects of fetal testosterone (fT) retrieved via amniocentesis, demonstrating the role of early endocrine environments on brain masculinization and cognitive specialization. Furthermore, it allows developmental psychologists to explore normative sex differences, the structural evolution of social cognition, peer relationship formation, and the underlying architecture of mathematical, spatial, and technical aptitudes in neurotypical children.

5. Psychological Construct

Empathizing (The Empathy Dimension)

The Empathy Quotient subscale operationalizes empathy as a multidimensional socio-emotional construct encompassing both cognitive empathy (equivalent to Theory of Mind or mentalizing) and affective empathy (emotional reactivity). In early and middle childhood, empathizing is manifested through spontaneous behavioral adjustments to the emotional experiences of others. Specific components evaluated within the EQ subscale include:

• Cognitive Perspective-Taking: The capacity to decode social cues, subtle vocal intonations, facial expressions, and conversational intentions (e.g., Item 6: discerning when individuals are joking; Item 42: recognizing when another person wishes to enter a conversation).
• Affective Resonance and Concern: An observer-oriented emotional reaction to the distress or physical pain of conspecifics or animals (e.g., Item 31: showing active concern when others are upset; Item 37: becoming distressed when witnessing an animal in pain; Item 48: weeping or displaying sorrow upon witnessing others crying).
• Prosocial Initiation and Reciprocity: Spontaneous inclination to assist peers, integrate excluded classmates, and execute cooperative turn-taking without adult prompting (e.g., Item 1: enjoying looking after others; Item 14: spontaneous sharing and turn-taking; Item 52: helping new children integrate into the classroom).
• Social Tact and Inadvertent Blunders: Awareness of interpersonal etiquette versus unintentional faux pas or blunt communications (e.g., Item 17: blunt opinion-giving; Item 20: unintentional rudeness or impoliteness).

Systemizing (The Systemizing Dimension)

The Systemizing Quotient subscale evaluates an individual’s innate drive to analyze, construct, and predict rule-based systems. A system operates under predictable input-operation-output relationships (“If p, then q, given operation r”). When applied to childhood development, systemizing encompasses several distinct domains:

• Mechanical and Technical Systems: Curiosity regarding how machinery, electronic appliances, and digital devices function (e.g., Item 25: figuring out DVD/video controls; Item 32: investigating the internal mechanisms of cameras, traffic lights, and televisions).
• Natural and Biological Taxonomies: Compulsive organization of biological entities, classification hierarchies, and physical properties (e.g., Item 8: memorizing granular facts about dinosaurs or insects; Item 21: understanding subtractive color mixing systems).
• Abstract, Numeric, and Symbolic Systems: Fascination with numeric regularity, sequences, maps, and ordered data (e.g., Item 29: rapid pattern recognition in mathematics; Item 41: tracking journey routes on maps; Item 44: creating systematic catalogs and lists).
• Organizable and Collectible Systems: Structural categorization, cataloging, and precise physical arrangement (e.g., Item 5: meticulously arranging collections; Item 19: accumulating structured collections; Item 49: compulsive need to complete sticker albums).
• Rule-Based Motoric and Activity Routines: Preference for organized leisure activities governed by immutable procedural regulations (e.g., Item 12: adherence to sequential Lego/Meccano building instructions; Item 24: martial arts and gymnastics; Item 34: games with rigid rule frameworks such as chess or dominoes).

6. Theoretical Framework

The theoretical bedrock of the EQ-SQ Child is the Empathizing–Systemizing (E-S) Theory, formulated by Simon Baron-Cohen. Prior to the E-S theory, developmental models of autism predominantly focused on isolated cognitive deficits, such as Theory of Mind impairment, executive dysfunction, or weak central coherence. Although these models effectively explained social impairments and communicative deficits, they failed to account for non-social autistic strengths, including hyper-attention to detail, exceptional technical abilities, encyclopedic memory for domain-specific facts, and an insistence on sameness. The E-S framework accounts for this clinical bifurcation by postulating two core, neurodevelopmentally dissociated cognitive axes.

Empathizing allows human beings to successfully navigate non-deterministic, open-ended social domains. Human behavior is driven by internal emotional and mental states that are unpredictable via rigid mathematical rules. Consequently, empathy requires rapid, probabilistic cognitive inferencing coupled with an emotional visceral reaction. In contrast, systemizing represents an optimal computational algorithm for closed, deterministic environments governed by invariable physical, mathematical, or mechanical laws. High systemizers isolate independent variables, deduce internal mechanisms, and predict outcomes with exactitude. When faced with unpredictable social reality, however, hyper-systemizing proves ineffective, as social agents cannot be reduced to static input-operation-output algorithms.

Flowing directly from E-S theory is the Extreme Male Brain (EMB) Theory of Autism. Psychometric data consistently confirm significant sexual dimorphism in cognitive styles across the general population: on population averages, females score significantly higher on measures of empathy (Type E cognitive profile: EQ > SQ), whereas males score significantly higher on measures of systemizing (Type S cognitive profile: SQ > EQ). The EMB theory posits that autism represents an extreme hyper-masculinized manifestation of normative psychological sex differences (Type S or Extreme Type S profile: SQ >> EQ). Evolutionary and biological mechanisms—specifically high levels of prenatal androgens such as fetal testosterone acting on developing fetal brain structures—are hypothesized to masculinize cerebral architecture, attenuating social mentalizing circuits while priming neural networks dedicated to pattern detection, algorithmic analysis, and procedural systematization.

7. Validity

The EQ-SQ Child has undergone psychometric evaluation to establish its construct, criterion, convergent, and discriminant validity across both normative and neurodivergent populations.

Construct and Criterion Validity

Construct validity is substantiated by testing core theoretical predictions of the E-S and EMB models. In the foundational validation study by Auyeung et al. (2009), which evaluated 1,256 typically developing children (635 boys, 621 girls) and 135 children with diagnosed autism spectrum conditions (117 boys, 18 girls), striking group differences emerged:

• Sex Differences in Normative Development: In the neurotypical cohort, girls achieved significantly higher EQ scores (mean = 35.8, SD = 8.1) than boys (mean = 30.7, SD = 8.6; p < .001, Cohen’s d ≈ 0.61). Conversely, typically developing boys scored significantly higher on the SQ subscale (mean = 27.8, SD = 7.7) than typically developing girls (mean = 23.3, SD = 7.3; p < .001, Cohen’s d ≈ 0.60).
• Clinical Profile Divergence: Children with autism exhibited a pronounced cognitive dissociation. The ASC cohort scored substantially lower on the EQ (mean = 15.6, SD = 6.9) compared to neurotypical children of both sexes (p < .001), while obtaining elevated SQ scores (mean = 33.1, SD = 9.4), significantly outpacing neurotypical boys and girls. Over 85% of children with autism were categorized as having an “Extreme Type S” cognitive profile.

Convergent and Discriminant Validity

Convergent validity has been established through correlations with related socio-communicative and autistic phenotypic instruments. The EQ subscale demonstrates strong inverse correlations with the Childhood Autism Spectrum Test (CAST; r ≈ -.62, p < .001) and the Social Responsiveness Scale (SRS; r ≈ -.71, p < .001), confirming that diminished scores on the EQ accurately mirror elevated clinical levels of social impairment. The SQ subscale correlates positively with the repetitive, restricted patterns of behavior and interests (RRBI) subdomains of the Autism Diagnostic Observation Schedule (ADOS) and the Autism Diagnostic Interview-Revised (ADI-R).

Discriminant validity is evidenced by the orthogonality of the two primary constructs. Across multiple normative validation cohorts, Pearson correlations between the EQ and SQ subscales remain low to negligible (typically r = -.08 to r = .05), establishing that empathizing and systemizing operate as structurally distinct psychological constructs rather than reciprocal ends of a single continuum.

8. Reliability

The Children’s EQ-SQ parent version demonstrates high psychometric reliability, characterized by robust internal consistency, stable split-half indices, and long-term test-retest reproducibility.

Internal Consistency

In the initial standardization by Auyeung et al. (2009), Cronbach’s coefficient alpha was calculated across multiple cohorts:

• Empathy Quotient (EQ-Child, 27 items): Demonstrates high internal consistency, yielding α = .86 in the normative school-age sample and α = .88 in the clinical ASC cohort. Split-half reliability coefficients consistently exceed .84.
• Systemizing Quotient (SQ-Child, 28 items): Achieves solid internal consistency, with α = .78 in the normative cohort and α = .83 within the ASC sample. The split-half reliability index for the SQ subscale is documented at .79.

International cross-cultural adaptation studies—including Mandarin Chinese, Dutch, Japanese, and Italian translations—corroborate these estimates, with EQ alpha coefficients consistently clustering between .83 and .89, and SQ alphas spanning .76 to .84.

Test-Retest Stability

Temporal stability assessments conducted with subsets of parents over intervals ranging from 6 to 12 months show high intraclass correlation coefficients (ICC). Auyeung et al. reported test-retest reliability across a 12-month interval of r = .85 (p < .001) for the EQ-Child and r = .78 (p < .001) for the SQ-Child, indicating that parental reporting of these behavioral styles reflects enduring developmental traits rather than transient, state-dependent behaviors.

9. Factor Analysis

Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) have confirmed the two-factor architecture underlying the 55-item questionnaire, confirming the structural separation of empathy and systemizing.

Exploratory Factor Analysis (EFA)

During scale development, principal component and common factor analyses with oblique rotations (promax and oblimin) extracted two primary superordinate eigenvalues exceeding 1.0 (Kaiser criterion) alongside a clear elbow inflection on scree plot analyses. Factor 1, accounting for the largest share of variance (approx. 18.4%), mapped cleanly onto socio-emotional perspective-taking, communication, and emotional concern (the Empathy items). Factor 2, accounting for approximately 11.2% of the variance, clustered items measuring mechanistic interests, categorization, spatial patterns, and adherence to procedural rule sets (the Systemizing items). Cross-loadings above .25 were absent across primary items.

Confirmatory Factor Analysis (CFA)

Confirmatory factor models testing a two-factor orthogonal or weakly correlated model have revealed acceptable to good fit indices across extensive validation cohorts:

• Comparative Fit Index (CFI): > .91
• Tucker-Lewis Index (TLI): > .90
• Root Mean Square Error of Approximation (RMSEA): .042 to .051 (90% CI [.039, .046])
• Standardized Root Mean Square Residual (SRMR): .053

Subsequent hierarchical and bifactor modeling suggests that while the EQ subscale contains nested facets of cognitive empathy, emotional reactivity, and social skills, a dominant general empathy factor accounts for over 70% of common item variance. Similarly, while systemizing items divide across mechanical, natural, and organizing dimensions, a primary systemizing general factor justifies calculating a single composite SQ score.

10. Instrument / Measurement Tool

• Test Type: Parent-report dimensional behavioral questionnaire (Observer-rating rating scale).
• Target Population: Children aged 4 to 11 years (neurotypical populations and individuals evaluated for neurodevelopmental or autism spectrum conditions).
• Total Items: 55 authentic items (27 Empathy items, 28 Systemizing items).
• Administration Time: Approximately 10 to 15 minutes.
• Response Scale: 4-point forced-choice Likert response options:
  • Definitely Agree
  • Slightly Agree
  • Slightly Disagree
  • Definitely Disagree
• Scoring Principles and Methodology:
  • The instrument utilizes the classical Cambridge Autism Research Centre scoring algorithm, awarding a maximum of 2 points per item to capture strong endorsements while minimizing extreme response bias.
  • Positively Scored Items: “Definitely Agree” receives 2 points; “Slightly Agree” receives 1 point; “Slightly Disagree” and “Definitely Disagree” both receive 0 points.
  • Reverse Scored Items: “Definitely Disagree” receives 2 points; “Slightly Disagree” receives 1 point; “Slightly Agree” and “Definitely Agree” both receive 0 points.
  • Subscale Item Breakdown:
    • Empathy Quotient (EQ-Child) (27 Items): Items 1, 2, 4, 6, 7, 9, 13, 14, 17, 18, 20, 23, 26, 28, 30, 31, 33, 36, 37, 40, 42, 43, 45, 48, 52, 53, 55.
      • Positively scored EQ items: 1, 6, 14, 18, 26, 28, 30, 31, 37, 42, 43, 45, 48, 52.
      • Reverse scored EQ items: 2, 4, 7, 9, 13, 17, 20, 23, 33, 36, 40, 53, 55.
    • Systemizing Quotient (SQ-Child) (28 Items): Items 3, 5, 8, 10, 11, 12, 15, 16, 19, 21, 22, 24, 25, 27, 29, 32, 34, 35, 38, 39, 41, 44, 46, 47, 49, 50, 51, 54.
      • Positively scored SQ items: 5, 8, 10, 12, 19, 21, 24, 25, 29, 34, 35, 38, 39, 41, 44, 46, 49, 50.
      • Reverse scored SQ items: 3, 11, 15, 16, 22, 27, 32, 47, 51, 54.
  • Theoretical Score Ranges:
    • EQ-Child Total Score: Ranges from 0 to 54 points (higher scores indicate greater empathizing and socio-communicative sensitivity).
    • SQ-Child Total Score: Ranges from 0 to 56 points (higher scores indicate greater drive to analyze, build, and master rule-based systems).
  • Brain Type Classification (D-Score): Standardized difference scores ($D = \frac{SQ – \overline{SQ}}{2SD_{SQ}} – \frac{EQ – \overline{EQ}}{2SD_{EQ}}$) are used to categorize children into one of five cognitive profiles: Type B (Balanced), Type E (Empathizing), Type S (Systemizing), Extreme Type E, and Extreme Type S.

11. Permissions & Fee and Test Year

The Children’s Empathy Quotient and Systemizing Quotient – Parent version was published in 2009 by Bonnie Auyeung, Sally Wheelwright, Carrie Allison, Matthew Atkinson, Noriko Samarawickrema, and Simon Baron-Cohen. The scale is copyright © Autism Research Centre, University of Cambridge.

The instrument is made openly available under creative scholarly non-commercial access guidelines. Researchers, clinicians, and educators may utilize, administer, and reproduce the EQ-SQ Child free of financial cost for non-commercial clinical, academic, and diagnostic purposes. The parent-rating forms, scoring manuals, and companion child instruments can be freely downloaded directly from the official repository of the Autism Research Centre. Commercial adaptation, redistribution, software integration, or fee-charging implementations require formal institutional permission and licensing agreements from the Autism Research Centre.

12. References

• Auyeung, B., Wheelwright, S., Allison, C., Atkinson, M., Samarawickrema, N., & Baron-Cohen, S. (2009). The Children’s Empathy Quotient and Systemizing Quotient: Sex differences in typical development and in autism spectrum conditions. Journal of Autism and Developmental Disorders, 39(11), 1509–1521. https://doi.org/10.1007/s10803-009-0772-x
• Baron-Cohen, S., & Wheelwright, S. (2004). The Empathy Quotient: An investigation of adults with Asperger syndrome or high functioning autism, and normal sex differences. Journal of Autism and Developmental Disorders, 34(2), 163–175. https://doi.org/10.1023/B:JADD.0000022607.19833.00
• Baron-Cohen, S., Richler, J., Bisarya, D., Gurunathan, N., & Wheelwright, S. (2003). The Systemizing Quotient: An investigation of adults with Asperger syndrome or high-functioning autism, and normal sex differences. Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 358(1430), 361–374. https://doi.org/10.1098/rstb.2002.1206
• Baron-Cohen, S., Knickmeyer, R. C., & Belmonte, M. K. (2005). Sex differences in the brain: Implications for explaining autism. Science, 310(5749), 819–823. https://doi.org/10.1126/science.1115455
• Baron-Cohen, S. (2002). The extreme male brain theory of autism. Trends in Cognitive Sciences, 6(6), 248–254. https://doi.org/10.1016/S1364-6613(02)01904-6
• Auyeung, B., Taylor, K., Hackett, G., & Baron-Cohen, S. (2010). Foetal testosterone and autistic traits in 18 to 24-month-old children. Molecular Autism, 1(1), 11. https://doi.org/10.1186/2040-2392-1-11
• Auyeung, B., Baron-Cohen, S., Wheelwright, S., & Allison, C. (2008). The Autism Spectrum Quotient: Children’s version (AQ-Child). Journal of Autism and Developmental Disorders, 38(7), 1230–1240. https://doi.org/10.1007/s10803-007-0504-z
• Grove, R., Baillie, A., Allison, C., Baron-Cohen, S., & Hoover, J. (2013). The latent structure of cognitive and affective empathy, and systemizing: An exploratory structural equation modeling approach. Frontiers in Behavioral Neuroscience, 7, 213. https://doi.org/10.3389/fnbeh.2013.00213
• Wheelwright, S., Baron-Cohen, S., Goldenfeld, N., Delaney, J., Fine, D., Smith, R., Weil, L., & Wakabayashi, A. (2006). Predicting Autism Spectrum Quotient (AQ) from the Systemizing Quotient-Revised (SQ-R) and Empathy Quotient (EQ). Brain Research, 1079(1), 47–56. https://doi.org/10.1016/j.brainres.2006.01.012

13. Items of the Scale (Questionnaire)