Peer Interactions in Primary School Questionnaire

1. Abstract

The Peer Interactions in Primary School Questionnaire (PIPS) is an empirically validated, self-report psychometric instrument designed to evaluate peer victimization and bullying perpetration among primary and elementary school children, particularly those in grades 1 through 6 (ages 6 to 12). Developed by Thomas P. Tarshis and Lynne C. Huffman in 2007, the instrument addresses a critical developmental gap in early childhood school psychology, where existing assessment batteries often relied exclusively on parent or teacher proxy reports or featured language comprehension barriers for emergent readers. The PIPS consists of 22 concisely worded items evaluated across a three-point Likert-type response scale (0 = Never, 1 = Sometimes, 2 = A Lot). Psychometric evaluation confirms a robust two-factor dimensional structure comprising the Victim Subscale (12 items) and the Bully Subscale (10 items), measuring overt physical, verbal, and relational forms of peer-directed aggression and interpersonal mistreatment. Across standard validation studies, the questionnaire demonstrates strong internal consistency reliability, with Cronbach’s alpha coefficients typically reported at α = .86 for the Victim subscale and α = .78 to .80 for the Bully subscale, accompanied by solid 2-week to 4-week test-retest reliability ($r > .75$). Structural validity has been verified using exploratory and confirmatory factor analysis, confirming clean factor differentiation with high convergent validity against established behavioral measures such as the Child Behavior Checklist (CBCL), the Olweus Bully/Victim Questionnaire, and teacher sociometric nominations. This article provides a comprehensive academic analysis of the PIPS, outlining its theoretical underpinnings in social-ecological systems and developmental psychopathology, psychometric properties, scoring procedures, clinical utility, and research applications.

2. Keywords

Peer Interactions in Primary School Questionnaire, PIPS, bullying perpetration, peer victimization, childhood aggression, relational aggression, primary school psychometrics, developmental assessment, sociometric status, pediatric mental health

3. Authors

The Peer Interactions in Primary School Questionnaire was conceived, developed, and psychometrically validated by clinical and developmental researchers specialized in child and adolescent psychiatry and behavioral pediatrics:

• Thomas P. Tarshis, MD, MPH: Child and Adolescent Psychiatrist, Bay Area Children’s Association (BACA), Cupertino, California, USA; formerly affiliated with the Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine. Dr. Tarshis has contributed extensively to research on school climate, peer harassment, youth aggression, and accessible community mental health systems for pediatric populations.
• Lynne C. Huffman, MD: Associate Professor of Pediatrics (Developmental-Behavioral Pediatrics) and, by courtesy, of Psychiatry and Behavioral Sciences at the Stanford University School of Medicine, Stanford, California, USA. Dr. Huffman is an authority on neurodevelopmental risk, emotional regulation, and biological markers of stress in primary school children.

Primary Developer Contact:
Thomas Tarshis, MD
Bay Area Children’s Association
20380 Town Center Lane, Suite 215
Cupertino, CA 95014, USA
Email: [email protected]

4. Purpose

Bullying during the primary school years is a pervasive public health concern linked to adverse socioemotional, cognitive, and somatic outcomes, including chronic school absenteeism, depressive symptoms, generalized anxiety, academic underachievement, and elevated risks for self-harm and externalizing conduct disorders. Despite the proliferation of adolescent bullying assessment inventories throughout the 1990s and early 2000s, measuring these phenomena in young children presented formidable methodological obstacles. Pre-existing instruments frequently incorporated complex vocabulary, abstract temporal recall windows (e.g., “over the past 6 months”), or explicit, emotionally loaded terminology such as “bullying” or “victimized,” which introduced substantial reporting bias, social desirability distortion, and cognitive fatigue among primary grade students.

The fundamental purpose of the Peer Interactions in Primary School Questionnaire (PIPS) is to provide a developmentally calibrated, objective, and psychometrically sound self-report instrument capable of screening both victimization and perpetration dynamics directly from the child’s perspective. By deliberately excluding the pejorative term “bully” from the child-facing items, the PIPS captures concrete behavioral markers (e.g., “I push or slap other students” or “Other students make me cry”) rather than subjective identity labels. This design mitigates defensive underreporting by perpetrators and reduces the stigma experienced by victimized children.

In clinical contexts, child psychologists, pediatricians, and school counselors deploy the PIPS as an early identification screening tool during psychoeducational assessments, triage for school-based intervention programs, and clinical evaluations of internalizing and somatic distress. In school-wide prevention programs, the tool serves as an evaluative metric to establish baseline epidemiological rates of peer aggression, track longitudinal trajectories across developmental transitions, and rigorously quantify the efficacy of multi-tiered systems of support (MTSS) and anti-bullying curricula.

5. Psychological Construct

The PIPS operationalizes peer mistreatment through a dual-construct framework encompassing two reciprocal yet distinct behavioral spectrums: Peer Victimization and Bullying Perpetration. Unlike unidimensional models that treat bullying and victimization as polar opposites of a single axis, developmental psychometrics recognizes them as orthogonal dimensions, enabling the identification of four distinct peer groups: pure victims, pure bullies, aggressive victims (bully-victims), and uninvolved youth.

The Victimization Construct (Victim Subscale)

Peer victimization within the PIPS reflects the subjective experience of repeated, harmful actions perpetrated by peers where an asymmetric power dynamic prevents the child from easily defending themselves. The instrument assesses this construct across three major functional domains:

• Physical and Property Victimization: Manifests as direct bodily aggression and unauthorized appropriation or destruction of personal possessions. Representative items assess physical abuse (“I am hit or kicked by other students”) and material violation (“Other students take things from me that I do not want to give them”).
• Verbal and Psychological Harassment: Encompasses direct overt verbal hostility, name-calling, and explicit intimidation intended to elicit fear or sadness. Assessed behaviors include teasing (“Other students tease me”), explicit threats (“Another student tells me they will hurt me”), and derision (“Other students make fun of me”).
• Relational Victimization and Social Exclusion: Reflects indirect, covert forms of manipulation aimed at damaging the child’s social standing, peer relationships, or feelings of belonging. Key indicators include systemic isolation (“Other students leave me out of games on purpose”), deliberate ostracism (“Other students ignore me on purpose”), and active peer rejection at recess (“At recess, I play by myself”).
• Somatic and Affective Repercussions: Captures the internalizing emotional impact generated by peer hostility, such as induced emotional distress (“Other students make me cry”), depressive affect (“Other students make me feel sad”), and school avoidance behavior (“I want to stay home from school because students are mean to me”).

The Perpetration Construct (Bully Subscale)

Bullying perpetration reflects proactive or reactive aggression directed toward peers with the intent of causing physical harm, social subjugation, or psychological distress. The PIPS assesses perpetration through distinct behavioral manifestations:

• Direct Physical Aggression: Overt physical assaults, rough interpersonal handling, and coercive bodily actions (“I push or slap other students”, “I hit or kick other students”).
• Direct Verbal Hostility and Intimidation: Overt spoken hostility designed to demean or control peers (“I call other students bad names”, “I tease other students”, “I tell other students I will hit or hurt them”).
• Social and Relational Aggression: Manipulative behaviors that recruit peers to ostracize or humiliate targeted individuals for social amusement or dominance (“I say mean things about a student to make other kids laugh”, “I give other students mean or ‘dirty’ looks”).
• Intentionality and Moral Affect: Evaluates conscious malevolent intent (“I make other students feel sad on purpose”, “I am mean to other students”) and incorporates an affective component addressing post-transgression guilt or remorse (“I feel bad because I am mean to other students”).

6. Theoretical Framework

The architecture and conceptual validity of the PIPS are grounded in several complementary paradigms within developmental psychology and behavioral ecology.

Social-Ecological Systems Theory

In accordance with Urie Bronfenbrenner’s Ecological Systems Theory, peer interactions do not occur in an isolated dyadic vacuum; rather, they reflect nested microsystemic transactions shaped by classroom dynamics, playground design, school climate, teacher supervision, and cultural norms. Bullying perpetration functions as a dynamic social process embedded within the peer group hierarchy. Children navigate peer groups by adopting defined participant roles (Salmivalli et al., 1996), such as reinforcers, assistants, defenders, or outsiders. The PIPS captures both the interpersonal behaviors displayed by perpetrators striving for peer status and the ecological consequences experienced by victimized youth in common micro-environments, such as during unstructured recess.

Olweus’s Foundational Bullying Typology

The structural distinction within the PIPS draws heavily on Dan Olweus’s seminal definition of bullying, which requires three foundational criteria: (1) intentional harm-doing, (2) recurrence over time, and (3) an asymmetrical balance of power. Rather than requiring young children to cognitively assess power asymmetry through meta-cognitive self-judgment, the PIPS embeds these criteria directly into concrete behavioral indicators, capturing the power imbalance through items assessing physical superiority, social exclusion, fear induction, and school avoidance.

Social Information Processing (SIP) Theory

The behavioral divergence between bullies and victims operationalized by the PIPS maps onto Kenneth Dodge’s Social Information Processing model. Aggressive youth frequently demonstrate hostile attribution biases (interpreting benign peer gestures as hostile) and select proactive aggressive strategies to attain social dominance. In contrast, socially victimized youth often display cue-interpretation hypervigilance, internalize peer feedback as evidence of personal inadequacy, and develop conditioned school-avoidance coping responses. The PIPS items mirror these exact behavioral and cognitive expressions.

7. Validity

The psychometric validity of the PIPS has been established through empirical investigations demonstrating robust construct, convergent, discriminant, and criterion-related validity.

Construct and Structural Validity

Construct validity was initially established by Tarshis and Huffman (2007) via rigorous item analysis, principal axis factoring, and structural equation modeling on large cohorts of primary school children ($N = 432$). Structural analyses confirmed that a two-factor model provides superior fit over a single-factor “general peer problem” model. The two latent factors—Victimization and Perpetration—exhibited moderate negative to weak orthogonal inter-factor correlations (typically $r = -.10$ to $.15$ across community samples), demonstrating that the instrument successfully differentiates victimization from perpetration rather than conflating them into a single bipolar continuum.

Convergent and Concurrent Validity

Convergent validity has been repeatedly corroborated by benchmarking the PIPS subscales against recognized gold-standard psychometric inventories and external observational indices:

• Achenbach System of Empirically Based Assessment (ASEBA): The PIPS Victim subscale exhibits statistically significant positive correlations with the Internalizing Problems ($r = .48$, $p < .001$), Anxious/Depressed ($r = .52$, $p < .001$), and Somatic Complaints ($r = .39$, $p < .01$) scales of the Child Behavior Checklist (CBCL) and Youth Self-Report (YSR). Conversely, the PIPS Bully subscale correlates significantly with the CBCL Externalizing Problems ($r = .54$, $p < .001$), Rule-Breaking Behavior ($r = .46$, $p < .001$), and Aggressive Behavior ($r = .61$, $p < .001$) subscales.
• Peer Sociometric Nominations: Cross-informant validation studies demonstrate strong agreement between child self-ratings on the PIPS and sociometric peer nominations. Children with elevated scores on the Bully subscale receive significantly higher nominations for “starts fights” and “disruptive” ($r = .51$), while high scorers on the Victim subscale correlate with “gets picked on” and “withdrawn” nominations ($r = .58$).
• Teacher Behavioral Ratings: Teacher ratings of student aggression and social vulnerability align robustly with student PIPS responses, corroborating multi-informant validity.

Discriminant and Criterion Validity

The PIPS exhibits clear discriminant validity against unrelated constructs such as academic aptitude and non-interpersonal attention deficits. Criterion validity is evidenced by the tool’s predictive power regarding school engagement: elevated scores on the Victim subscale directly predict verified unexcused school absences, clinic visits for functional abdominal pain, and subjective feelings of school alienation.

8. Reliability

The PIPS demonstrates excellent reliability profiles across classical test theory metrics, including internal consistency, test-retest stability, and standard error of measurement.

Internal Consistency Reliability

Across validation studies involving diverse demographic cohorts of elementary students, the PIPS subscales demonstrate high internal consistency:

• Victim Subscale (12 items): Cronbach’s alpha coefficients range consistently between α = .84 and α = .88, with the seminal Tarshis and Huffman (2007) validation study reporting α = .86. McDonald’s omega estimates similarly indicate robust composite reliability (ω = .87). Corrected item-total correlations for the Victim subscale range from .41 to .68, with no single item removal improving overall scale alpha.
• Bully Subscale (10 items): Cronbach’s alpha coefficients range between α = .77 and α = .82 (α = .78 in the primary validation cohort). Corrected item-total correlations range from .36 to .64. Item 18 (“I feel bad because I am mean to other students”) displays lower item-total correlation relative to direct physical aggression items, reflecting the complex emotional variance associated with remorse, yet its retention is clinically critical for distinguishing callous-unemotional traits from reactive aggressive subtypes.

Test-Retest Reliability and Temporal Stability

Temporal stability assessments conducted over a 2- to 4-week interval yield intraclass correlation coefficients (ICC) and Pearson correlation coefficients of:

• Victim Subscale: $r = .79$ to $.83$, indicating substantial stability across academic terms while maintaining sensitivity to ecological interventions.
• Bully Subscale: $r = .74$ to $.78$, demonstrating reliable behavioral reporting over short intervals.

The Standard Error of Measurement (SEM) remains low across both subscales ($ ext{SEM} < 1.8$ raw score points), establishing high measurement precision suitable for individual-level clinical and psychoeducational decision-making.

9. Factor Analysis

The underlying dimensionality of the PIPS has been thoroughly evaluated through Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

Exploratory Factor Analysis (EFA)

During the developmental phase, an initial item pool of prospective behavioral statements was subjected to Principal Axis Factoring (PAF) with oblique (Promax) rotation to accommodate plausible latent correlations between behavioral manifestations. Scree plot inspection, parallel analysis, and Kaiser’s eigenvalue-greater-than-one criterion unambiguously supported a two-factor latent solution accounting for over 46% of the total variance.

Factor 1 cleanly aggregated all 12 victim-centric items (loadings ranging from .45 to .76), while Factor 2 aggregated all 10 bully-centric items (loadings ranging from .42 to .75), demonstrating absent cross-loadings above the standard .30 cutoff threshold.

Confirmatory Factor Analysis (CFA)

Subsequent structural modeling across independent validation samples confirmed good absolute and incremental model fit indices for the two-factor model:

• Chi-square to degrees of freedom ratio ($\chi^2/df$): 1.72 (values < 2.0 indicate excellent fit).
• Comparative Fit Index (CFI): .94 to .96.
• Tucker-Lewis Index (TLI): .93 to .95.
• Root Mean Square Error of Approximation (RMSEA): .042 (90% CI: [.034, .050]), well below the standard .06 benchmark for good fit.
• Standardized Root Mean Square Residual (SRMR): .048.

Measurement invariance testing across gender groups confirmed strict factorial invariance (configural, metric, and scalar invariance), demonstrating that the PIPS measures bullying and victimization equivalently across male and female students.

10. Instrument / Measurement Tool

• Official Instrument Name: Peer Interactions in Primary School Questionnaire (PIPS)
• Target Population: Primary and elementary school children aged 6 to 12 years (typically Grades 1 through 6). For younger students (Grades 1–2), oral group administration or individual read-aloud protocol is recommended.
• Administration Modality: Paper-and-pencil self-report or computer-administered digital assessment; individual or classroom-wide group testing.
• Total Administration Time: Approximately 8 to 12 minutes.
• Total Item Count: 22 items.
• Subscale Composition:
  • Victim Subscale: 12 items (Items 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 20, and 22).
  • Bully Subscale: 10 items (Items 2, 4, 6, 8, 10, 12, 14, 16, 18, and 21).
• Response Format: 3-point ordinal Likert scale:
  • Never = 0 points
  • Sometimes = 1 point
  • A Lot = 2 points
• Scoring Procedures:
  • Victim Subscale Score: Sum the assigned points of Items 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 20, and 22. Score range: 0 to 24. Higher scores denote elevated exposure to peer victimization, rejection, and relational harassment.
  • Bully Subscale Score: Sum the assigned points of Items 2, 4, 6, 8, 10, 12, 14, 16, 18, and 21. Score range: 0 to 20. Higher scores reflect elevated levels of aggressive perpetration and antisocial peer conduct.
  • Total Global Interaction Score (Optional): While subscale scores are primary, total scores (range 0 to 44) can evaluate general interpersonal conflict.
• Clinical Classification Matrix: Using established local norm distributions or standard deviation cutoffs (≥ 1.5 SD above the sample mean):
  • Low Risk / Uninvolved: Average or low scores across both subscales.
  • Pure Victim: High Victim subscale score (≥ 1.5 SD), Low Bully subscale score (< 1.0 SD).
  • Pure Bully: High Bully subscale score (≥ 1.5 SD), Low Victim subscale score (< 1.0 SD).
  • Bully-Victim (Aggressive Victim): Elevated scores on both subscales (≥ 1.5 SD), representing the subgroup at highest psychiatric risk.

11. Permissions & Fee and Test Year

• Year of Formal Publication: 2007.
• Original Copyright: © 2007 Lippincott Williams & Wilkins (LWW), Wolters Kluwer Health. Published in the Journal of Developmental and Behavioral Pediatrics.
• Public Health Compendium Inclusion: The PIPS is officially indexed on page 55 of Measuring Bullying Victimization, Perpetration, and Bystander Experiences: A Compendium of Assessment Tools, released by the Centers for Disease Control and Prevention (CDC).
• Accessibility and Licensing: The scale items and scoring directions are accessible for non-profit academic research, school-based screening, and clinical practice. However, because original publication rights are held by Wolters Kluwer/LWW, formal written permission or institutional licensing through the Copyright Clearance Center (CCC) is legally required for commercial diagnostic incorporation or reproduction in revenue-generating publications. Researchers must contact the lead author, Dr. Thomas Tarshis, or the publisher regarding adapted uses.

12. References

Below are primary academic works and compendia documenting the development, psychometric properties, and clinical application of the PIPS:

• Dodge, K. A., & Pettit, G. S. (2003). A biopsychosocial model of the development of chronic conduct problems in children. Development and Psychopathology, 15(3), 749–771. https://doi.org/10.1017/s0954579403000375
• Hamburger, M. E., Basile, K. C., & Vivolo, A. M. (2011). Measuring bullying victimization, perpetration, and bystander experiences: A compendium of assessment tools. Centers for Disease Control and Prevention, National Center for Injury Prevention and Control. https://www.cdc.gov/violenceprevention/pdf/bullycompendiumbk-a.pdf
• Olweus, D. (1993). Bullying at school: What we know and what we can do. Blackwell Publishers.
• Salmivalli, C., Lagerspetz, K., Björkqvist, K., Österman, K., & Kaukiainen, A. (1996). Bullying as a group process: Participant roles and their relations to social status within the group. Aggressive Behavior, 22(1), 1–15. https://doi.org/10.1002/(SICI)1098-2337(1996)22:1<1::AID-AB1>3.0.CO;2-T
• Tarshis, T. P., & Huffman, L. C. (2007). Psychometric properties of the Peer Interactions in Primary School (PIPS) questionnaire. Journal of Developmental and Behavioral Pediatrics, 28(2), 125–132. https://doi.org/10.1097/01.DBP.0000267564.91230.b3

13. Items of the Scale