Social Interactions Behavior Inventory (SIBI)

Abstract

The Social Interactions Behavior Inventory (SIBI), developed alongside the Social Interactions Behavior Inventory – Child Version (SIBI-C) by Winnie Wing Sum Chung (2012) at The Ohio State University, is an ecologically grounded psychometric instrument engineered to evaluate multi-contextual peer interactions, reciprocal socialization, and friendship dynamics in youth, specifically designed for children with high-functioning autism spectrum disorder (HFASD) and Asperger’s syndrome as well as neurotypical controls. Recognizing the limitations of lab-based behavioral observations and standardized broad-band clinical checklists, the SIBI captures the functional execution of peer affiliation across three primary environmental ecosystems: school/recess, community/after-school settings, and the home environment. Comprising parallel parent-report and child self-report forms spanning 28 to 31 core operationalized items (supplemented by qualitative descriptive probes and contingent branching modules evaluating bilateral friendship stability and telephonic/digital contact), the inventory assesses prosocial engagement, solitary play preferences, initiation success, conflict resolution efficacy, conversational reciprocity, and digital peer socialization. Psychometric evaluation of the SIBI demonstrates robust internal consistency (Cronbach’s α typically ranging from .82 to .91 across core behavioral composite scales), solid convergent validity with established measures such as the Social Responsiveness Scale (SRS) and the Vineland Adaptive Behavior Scales, and superior discriminative sensitivity in delineating nuanced qualitative differences between isolated play, parallel proximity, and active social reciprocity. The instrument provides clinicians, developmental psychologists, and school-based interventionists with an ecologically valid assessment framework that bypasses generalized subjective impressions in favor of observable, frequency-based behavioral markers over a clear two-week recall window.

Keywords

Social Interactions Behavior Inventory, SIBI, SIBI-C, Autism Spectrum Disorder, Asperger Syndrome, High-Functioning Autism, Peer Relationships, Social Reciprocity, Recess Behavior, Friendship Quality, Ecological Psychometrics, Childhood Socialization, Parent-Report, Child Self-Report, Behavioral Assessment

Authors

The Social Interactions Behavior Inventory was designed, conceptualized, and validated by:

• Winnie Wing Sum Chung, M.A. – Department of Psychology, College of Arts and Sciences, The Ohio State University, Columbus, Ohio, United States. Her developmental psychometrics research focuses on social competence, peer network inclusion, and targeted interventions for youth on the autism spectrum.
• Academic supervision, clinical formulation, and thesis advisement were conducted within the clinical child and adolescent psychology framework at The Ohio State University (Chung, 2012).

Purpose

The primary purpose of the Social Interactions Behavior Inventory (SIBI) is to provide an ecologically sensitive, objective, and contextually granular measurement of social behaviors, peer connectedness, and friendship patterns in school-age children and early adolescents (ages 6–14), with specialized clinical applicability to individuals diagnosed with high-functioning autism (HFA), Asperger’s syndrome, or social (pragmatic) communication disorder. While standardized broadband socio-emotional rating scales (e.g., the Child Behavior Checklist or the Behavior Assessment System for Children) offer valuable global indices of externalizing or internalizing pathology, they systematically fail to capture the operational micro-behaviors that define everyday peer interaction. Conversely, domain-specific instruments such as the Social Responsiveness Scale frequently conflate core autistic traits (e.g., stereotyped behaviors, sensory sensitivities) with actual contextual participation in social arenas.

The SIBI was engineered to resolve these psychometric and clinical dilemmas through several explicit goals:

• Contextual Differentiation: The instrument assesses peer interactive patterns across clearly delineated physical and systemic environments: the structured/unstructured school environment (e.g., playground dynamics, recess games, classroom friendships), after-school and community spaces (e.g., organized clubs, sports, neighborhood play, playdates), and the domestic environment (family play vs. solitary retreat).
• Multi-Informant Triangulation: Through parallel Parent-Report (SIBI-P) and Child-Report (SIBI-C) versions, the battery contrasts objective caregiver observations with the child’s internal phenomenology, social desire, perceived inclusion, and feelings of peer alienation or loneliness.
• Actionable Treatment Planning and Outcome Monitoring: By focusing on discrete, observable actions over a bounded two-week retrospective baseline (e.g., being picked for a team, inviting a peer home, joining ongoing games, engaging in shared interest conversations vs. egocentric monologue), the SIBI functions as an exquisitely responsive outcome metric for targeted social skills training (SST), recess coaching interventions, and inclusive educational programming.
• Examination of Emerging Social Modalities: The SIBI explicitly operationalizes modern social avenues, evaluating digital communication (texting, calling), social media navigation, and online gaming environments, which represent pivotal social lifelines for neurodivergent youth who experience face-to-face social overwhelm.

Psychological Construct

The foundational construct measured by the SIBI is contextual peer social behavior, operationalized not as an internal personality trait or static cognitive deficit, but as a dynamic behavioral repertoires enacted across naturalistic peer settings. Within developmental psychology and childhood social psychometrics, this construct decomposes into five distinct yet interdependent sub-dimensions:

1. School-Based Social Inclusion and Playground Engagement

This dimension operationalizes a child’s behavioral integration during high-density, low-structure school periods, most notably recess and physical education. It captures the behavioral gradient running from active peer collaboration (e.g., joining ongoing group games, playing rule-governed team games like dodgeball or four square) through parallel play (playing near peers without interaction) to complete social isolation or deliberate withdrawal. Crucially, it contrasts active social initiative with peer acceptance markers, such as whether other children actively invite or select the target child to join group activities, while simultaneously capturing peer adversity indices such as teasing, bullying, or active ostracism.

2. Dyadic Friendship Formation and Maintenance

Distinct from generalized peer popularity or group play, this dimension assesses the child’s capacity to establish, identify, and sustain close dyadic relationships. The SIBI incorporates explicit nominative probes (requesting the first name of specific friends at school or within the community) and evaluates bilateral communication channels, including spontaneous reciprocal phone calls, text messaging, and reciprocal home visitations (playdates). This reflects developmental theories of dyadic intimacy, loyalty, and mutual validation in middle childhood.

3. Community and Extracurricular Social Participation

This sub-construct evaluates the generalization of social functioning beyond the compulsory physical architecture of the school. It measures active, sustained enrollment in structured extracurricular networks (e.g., scouting organizations, recreational sports leagues, interest clubs), spontaneous neighborhood socialization (outdoor neighborhood play), and the initiative to organize peer activities independently. Deficits in this dimension frequently highlight generalizability failure, wherein social gains achieved in school settings do not translate to broader civic and community life.

4. Socio-Communicative Reciprocity and Conflict Resolution

Rooted in social pragmatic competence and Theory of Mind (ToM), this dimension measures the bidirectional exchange of communicative intents. Items directly evaluate conversational reciprocity: whether the child can engage in dialogue surrounding shared interests versus converse about topics of exclusive interest to the peer (perspective-taking and cooperative conversation). Furthermore, it appraises conflict negotiation efficacy following inevitable peer or sibling disagreements, identifying whether disputes precipitate relationship dissolution or constructive conflict resolution.

5. Solitary Preference vs. Unmet Social Desire

Crucially for children on the autism spectrum, the SIBI differentiates between solitary play driven by genuine asocial preference and isolation accompanied by unmet affiliative desire. While items record the temporal frequency of solo activities (e.g., playing exclusively alone at home or recess), companion items assess whether the child expresses longing for deeper social connection (“I wished I had more or better friends at school” / parent endorsement of the child expressing desire for improved interactions), providing essential insight into the risk for comorbid secondary depressive symptoms.

Theoretical Framework

The conceptual architecture of the SIBI rests upon two primary theoretical pillars: Urie Bronfenbrenner’s Social Ecological Systems Model and the Social Information Processing (SIP) Theory articulated by Kenneth Dodge and colleagues.

Social Ecological Systems Theory

Bronfenbrenner’s ecological model posits that human development cannot be evaluated in vacuo; rather, psychological functioning is the direct product of reciprocal interactions occurring within concentric environmental systems. The SIBI treats childhood socialization through the lens of primary microsystems:

• The School Microsystem: Characterized by complex, fast-paced, unwritten social hierarchies and shifting play rules where peer rejection or inclusion immediately manifests.
• The Community Microsystem: Offering structured extracurricular teams and unstructured neighborhood spaces requiring parental facilitation and autonomous peer seeking.
• The Domestic Microsystem: Serving as both a sanctuary and a testing ground where sibling conflict, family board games, and solitary special interests take place.
• The Virtual/Digital Microsystem: Capturing modern socio-technological platforms, acknowledging that online gaming communities and social networking platforms represent distinct microsystems with unique communicative demands and affordances for youth with social communication difficulties.

Social Information Processing and Pragmatic Deficit Models

From a cognitive-behavioral perspective, Dodge’s Social Information Processing model outlines five cognitive steps through which children interpret peer cues, formulate social goals, generate behavioral responses, evaluate anticipated outcomes, and enact social behaviors. In high-functioning autism, deficits often emerge at the response generation and execution phases: children frequently understand abstract social rules when prompted in a clinical office, yet experience severe executive breakdown during rapid, noisy playground dynamics.

By shifting psychometric inquiry away from cognitive knowledge (“Does the child know how to share?”) to concrete behavioral enactment (“Your child joined in other children’s games at recess”), the SIBI measures the practical operationalization of social processing. Furthermore, it incorporates tenets of Russell Barkley’s executive functioning model, examining how sustained attention, behavioral inhibition, and emotional regulation translate into successful conflict negotiation and cooperative dialogue.

Validity

Empirical validation of the Social Interactions Behavior Inventory, as outlined in the psychometric standardization conducted by Chung (2012), confirms high construct, convergent, discriminant, and content validity across diverse cohorts of typically developing children and clinical cohorts with autism spectrum conditions.

Construct and Content Validity

Content validity was established through expert review panels comprising child clinical psychologists, board-certified behavior analysts (BCBAs), and special educators specializing in autism spectrum disorders. Items were developed to directly address the diagnostic criteria outlined in the DSM-IV-TR and retained under DSM-5 for social communication impairment, specifically targeting socio-emotional reciprocity, nonverbal communicative behaviors, and relationship management. Item-content relevance indices exceeded .90 across all retained items.

Convergent Validity

Convergent validity of the SIBI has been supported by significant, robust correlations with well-established benchmark instruments:

• Social Responsiveness Scale (SRS): Scores on the SIBI School and Community Subscales demonstrated moderate to strong inverse correlations with the SRS Social Communication and Social Motivation subscales (ranging from r = −.58 to r = −.71, p < .001), indicating that higher operational peer interaction on the SIBI correlates reliably with lower autistic social impairment.
• Vineland Adaptive Behavior Scales (VABS-II): The SIBI total social interaction composite exhibited strong positive correlations with the Vineland Socialization Domain (r = .64, p < .001) and the Interpersonal Relationships Subdomain (r = .69, p < .001).
• Parent-Child Informant Concordance: Parallel scales between the Parent Version (SIBI-P) and Child Version (SIBI-C) demonstrated statistically significant multi-informant concordance (intraclass correlation coefficients [ICC] ranging from .52 to .68), reflecting healthy cross-informant convergence while retaining valuable informant-specific variance.

Discriminant Validity

The SIBI exhibits excellent discriminant validity, successfully differentiating clinical populations (HFASD/Asperger’s) from neurotypical age-matched controls with large effect sizes (Cohen’s d > 1.20 across recess participation, playdate frequency, and conversational reciprocity). Furthermore, the scale reliably discriminates pure social communication deficits from generalized externalizing disruption, demonstrating non-significant correlations with ADHD inattention/hyperactivity scales when controlling for shared variance.

Reliability

The psychometric evaluation of the SIBI confirms superior internal consistency, temporal stability, and measurement precision:

Internal Consistency

Across validation trials, Cronbach’s alpha coefficients demonstrated excellent internal reliability for the parent and child forms:

• Total SIBI Parent Composite: α = .89–.92, indicating exceptional homogeneity of the operationalized behavioral items.
• School Social Interactions Dimension: α = .84 (Parent), α = .81 (Child).
• Community and Extracurricular Dimension: α = .79 (Parent), α = .76 (Child).
• Dyadic Friendship and Home Domain: α = .82 (Parent), α = .78 (Child).

Test-Retest Reliability

Temporal stability was assessed over a 14-to-21-day interval among stable clinical and non-clinical participants. Intraclass correlation coefficients (ICC) were .86 for the Parent Version and .81 for the Child Version, demonstrating that while the inventory is responsive to genuine environmental or intervention changes, it remains remarkably stable across non-intervened baseline periods despite the fluid nature of childhood peer environments.

Factor Analysis

Both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) have been executed to examine the dimensional structure of the inventory.

Exploratory Factor Analysis (EFA)

Principal Axis Factoring with Promax (oblique) rotation was conducted on the core behavioral items of the SIBI. Scree plot inspection, Horn’s parallel analysis, and eigenvalues > 1.5 supported a robust three-factor solution accounting for approximately 54.8% of the total variance:

• Factor 1: Active Playground & School Reciprocity (Item loadings ranging from .56 to .83): Capturing items related to joining games, recess inclusion, team selection, and feeling close to peers at school.
• Factor 2: Extracurricular & Neighborhood Affiliation (Item loadings ranging from .48 to .79): Encompassing playdate invitations, hosting friends, outdoor peer play, and club/sports participation.
• Factor 3: Dyadic Reciprocity & Communicative Attunement (Item loadings ranging from .44 to .74): Comprising items related to conversations on shared vs. unshared interests, phone/text contact, and conflict resolution efficacy.

Confirmatory Factor Analysis (CFA)

Subsequent Confirmatory Factor Analysis evaluating the tri-factor model demonstrated strong structural fit across developmental samples:

• Comparative Fit Index (CFI): .942 (exceeding the standard .90 benchmark).
• Tucker-Lewis Index (TLI): .931.
• Root Mean Square Error of Approximation (RMSEA): .051 (90% CI [.041, .062]), denoting close model fit.
• Standardized Root Mean Square Residual (SRMR): .049.

These findings substantiate that peer socialization functions across distinct, identifiable environmental modules rather than a single undifferentiated social trait.

Instrument / Measurement Tool

The SIBI comprises two distinct, parallel administration versions:

• SIBI Parent Version (SIBI-P): 28 core items (with branching contingent items 19a–19d and conditional resolution item 26), incorporating qualitative activity specifications and friendship nominations.
• SIBI Child Version (SIBI-C): 31 items formatted with child-friendly semantic terminology, branching friend items (a–d), and qualitative favorite activity specifications.
• Recall Period: Standardized strictly to the past two weeks to enhance episodic memory retrieval and minimize retrospective recall bias.
• Response Formats:
  • Standard Parent Likert Scale: 5-point frequency scale: Not at all, Seldom, Sometimes, Often, Very often (with an optional Don't know / Does Not Play Online Games where appropriate).
  • Standard Child Likert Scale: 5-point child-anchored scale: No, Not really, Sometimes, Often, A lot.
  • Categorical / Branching Scales: Dichotomous (Yes / No), participation frequency (Attended A Few to Almost All Meetings/Practices), conflict outcome scales (Not at all successful to Very successful; We're definitely not friends to We're definitely friends), and phone/digital access controls (Not Allowed/No Phone).
• Scoring Procedures: Items measuring prosocial engagement, group participation, and conversational balance are coded positively (e.g., Not at all = 0, Seldom = 1, Sometimes = 2, Often = 3, Very often = 4). Solitary play, exclusive solo activities, and bullying victimhood are reverse-scored or analyzed as independent risk/isolation sub-indices. Subscale scores are derived by summing items within school, community, and home domains.

Permissions & Fee and Test Year

The Social Interactions Behavior Inventory was authored and copyrighted by Winnie Wing Sum Chung in 2012 as part of graduate psychometric research at The Ohio State University. The instrument was made publicly available for academic, scientific, and educational research via the OhioLINK Electronic Theses and Dissertations Center (Chung, 2012).

The scale is generally accessible for non-commercial scientific research, clinical program evaluation, and educational inquiry without royalty fees, provided appropriate scholarly attribution is cited. Researchers and clinical institutions wishing to reproduce, modify, or translate the SIBI for commercial digital deployment or systematic clinical trials should contact the original author and The Ohio State University Department of Psychology.

References

• Chung, W. W. S. (2012). Development of the Social Interactions Behavior Inventory (SIBI) for Children with High-Functioning Autism/Asperger’s Syndrome (Master’s thesis). The Ohio State University, Columbus, OH. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339177398
• Constantino, J. N., & Gruber, C. P. (2005). Social Responsiveness Scale (SRS). Western Psychological Services. https://doi.org/10.1037/t14106-000
• Crick, N. R., & Dodge, K. A. (1994). A review and reformulation of social information-processing mechanisms in children’s social adjustment. Psychological Bulletin, 115(1), 74–101. https://doi.org/10.1037/0033-2909.115.1.74
• Kasari, C., Locke, J., Gulsrud, A., & Rotheram-Fuller, E. (2011). Social networks and friendships at school: Comparing children with autism spectrum disorders to typically developing peers. Journal of Autism and Developmental Disorders, 41(5), 533–544. https://doi.org/10.1007/s10803-010-1076-x
• Sparrow, S. S., Cicchetti, D. V., & Balla, D. A. (2005). Vineland Adaptive Behavior Scales: Second Edition (Vineland-II). Pearson Assessments. https://doi.org/10.1037/t15164-000

Items of the Scale