Spider Phobia Questionnaire for Children (SPQ-C)

1. Abstract

The Spider Phobia Questionnaire for Children (SPQ-C) is a standardized, self-report psychometric instrument designed to assess the severity of spider fear and arachnophobia in pediatric and adolescent populations aged approximately 8 to 15 years. Developed by Merel Kindt, Jos F. Brosschot, and Peter Muris in 1996 as an adaptation of the adult Spider Phobia Questionnaire (SPQ; Klorman et al., 1974), the SPQ-C operationalizes the cognitive, somatic, behavioral, and emotional manifestations of spider phobia through 29 dichotomous items. Respondents evaluate each statement using a binary response format (“True” vs. “Not true”). Psychometric evaluations demonstrate strong internal consistency (Cronbach’s α = .89) and acceptable test-retest reliability across multi-week intervals (r = .61), reflecting stable trait fear alongside developmentally sensitive variance. Factor analytic investigations predominantly support a robust unidimensional construct representing generalized spider fear, while sub-facets capture behavioral avoidance, physiological reactivity, cognitive preoccupation, and animal-related disgust. The scale exhibits high convergent validity with related pediatric fear measures—such as the Fear Survey Schedule for Children-Revised (FSSC-R)—and strongly predicts performance on behavioral avoidance tasks (BATs) and attentional bias paradigms (e.g., the pictorial and linguistic Spider Stroop task). By establishing clear empirical benchmarks for non-clinical vs. phobic youth, the SPQ-C serves as a vital diagnostic screener, outcome measure in exposure-based cognitive behavioral therapy (CBT), and research tool in developmental psychopathology.

2. Keywords

Spider Phobia Questionnaire for Children, SPQ-C, arachnophobia, pediatric specific phobia, child anxiety assessment, behavioral avoidance test, psychometrics, Merel Kindt, cognitive bias, evolutionary preparedness

3. Authors

The SPQ-C was developed and validated by a consortium of Dutch clinical psychologists and psychometric researchers specializing in cognitive vulnerability, experimental psychopathology, and childhood anxiety disorders:

• Merel Kindt, Ph.D. — Professor of Clinical Psychology at the University of Amsterdam (UvA), Netherlands. Dr. Kindt is internationally recognized for pioneering work on memory reconsolidation in phobias, associative fear learning, and cognitive processing biases in pediatric and adult anxiety disorders.
• Jos F. Brosschot, Ph.D. — Professor of Health Psychology at Leiden University, Netherlands. His research specializes in the cognitive regulation of stress, perseverative cognition (worry and rumination), and psychosomatic mechanisms in emotional disorders.
• Peter Muris, Ph.D. — Professor of Developmental Psychopathology at Maastricht University, Netherlands. Dr. Muris has authored extensive psychometric evaluations and clinical investigations on childhood specific phobias, anxiety-related cognitive biases, and behavioral inhibition.

4. Purpose

The primary purpose of the Spider Phobia Questionnaire for Children (SPQ-C) is to provide an empirically grounded, developmentally calibrated psychometric measure for evaluating spider-specific anxiety in children and adolescents. While animal fears represent one of the most common normative developmental fears of early to middle childhood, a significant subset of children experience debilitating, clinically elevated phobic reactions that satisfy the diagnostic criteria for a Specific Phobia (Animal Type) under DSM-IV, DSM-5, and ICD-11 diagnostic frameworks. The SPQ-C serves several critical clinical and research imperatives:

• Differential Screening and Diagnostic Clarification: The SPQ-C distinguishes between normative, sub-clinical developmental aversion toward arachnids and clinical-grade phobic reactions that induce functional impairment, academic disruption, or extreme distress.
• Quantifying Multi-Domain Phobic Symptoms: The questionnaire captures the multidimensional expression of phobia, covering overt behavioral avoidance (e.g., refusing to enter parks or closets), anticipatory hypervigilance (e.g., checking shoes or scanning surroundings), autonomic arousal (e.g., shivering, nausea, tension), and catastrophic cognitions.
• Clinical Treatment Monitoring and Outcome Evaluation: In pediatric exposure therapy and cognitive-behavioral protocols, the SPQ-C serves as a sensitive pre- and post-intervention baseline, measuring symptom reduction, desensitization, and the extinction of avoidant response patterns.
• Experimental Psychopathology Research: The instrument is widely employed in cognitive and developmental psychology to correlate self-reported subjective fear with objective cognitive markers, including attentional bias (Stroop and dot-probe tasks), selective memory recall, interpretive bias, and physiological reactions during in vivo Behavioral Avoidance Tasks (BAT).

5. Psychological Construct

The psychological construct assessed by the SPQ-C is pediatric arachnophobia (specific phobia: animal type). Phobias of animals, particularly spiders, are characterized by persistent, excessive, and developmentally inappropriate fear triggered by the presence or anticipation of the stimulus. The construct encompasses four primary interrelated symptom clusters:

1. Behavioral Avoidance and Escape

Avoidance is the behavioral hallmark of specific phobia. In the SPQ-C, this dimension assesses the child’s overt efforts to bypass possible encounters with spiders, such as refusing to visit parks or gardens (Item 1), detouring on the way to school even if it causes tardiness (Item 28), keeping closet doors closed (Item 9), or fleeing when an encounter occurs (Item 20). It also measures avoidance of symbolic representations, such as closing one’s eyes during television scenes (Item 3) or abandoning books that feature spiders (Item 27).

2. Physiological and Somatosensory Reactivity

Exposure or anticipation of exposure to the phobic object triggers acute activation of the sympathetic nervous system and visceral affective responses. The SPQ-C measures specific somatic manifestations, including bodily shivering (Item 15), muscular tension (Item 11), feelings of nausea or stomach sickness (Item 13), and generalized nervousness upon receiving social cues that spiders are near (Item 8).

3. Cognitive Hypervigilance and Catastrophizing

Cognitive models of phobia emphasize that phobic individuals exhibit distorted threat appraisal and selective attention. The SPQ-C captures anticipatory checking routines (Item 10: checking shoes for spiders; Item 23: examining fruit before picking) and pervasive catastrophic appraisal (Item 21: ranking spiders as the most terrifying animal; Item 5: an inability to sleep if a spider has been spotted in the bedroom).

4. Disgust Sensitivity and Affective Valence

Contemporary psychopathology recognizes that animal phobias—particularly insect and arachnid fears—are maintained not only by danger appraisal but also by profound disgust sensitivity. Items assessing aversion to physical morphology and movement patterns (Item 18: viewing the way spiders walk as an “ugly sight”) and reverse-scored items evaluating aesthetic appreciation (Item 26: admiring spider webs; Item 16: viewing spiders as funny or interesting) reflect this valence component.

6. Theoretical Framework

The SPQ-C is grounded in multiple complementary frameworks within cognitive-behavioral psychology, evolutionary psychobiology, and developmental psychopathology:

1. Evolutionary Preparedness Theory

Pioneered by Martin Seligman (1971) and expanded by Arne Öhman and Susan Mineka (2001), preparedness theory posits that humans have evolved phylogenetically conditioned predispositions to rapidly acquire and resist extinction of fears toward stimuli that posed ancestral survival threats (such as venomous snakes and spiders). The SPQ-C reflects this evolutionary framework; unlike culturally novel threats (e.g., electrical outlets, guns), spider phobias manifest predictably in middle childhood and require minimal direct traumatic conditioning to emerge.

2. Rachman’s Three Pathways of Fear Acquisition

Stanley Rachman (1977) formulated three primary pathways through which children acquire fears: (a) direct conditioning (aversive classical conditioning), (b) vicarious conditioning (observational learning and modeling from parents or peers), and (c) negative informational transmission (verbal threat information). SPQ-C items incorporate peer-referent and pedagogical contexts (Item 17: expectations of peer fear; Item 25: avoidance of classroom instruction on spiders), capturing the systemic informational and observational pathways through which children maintain phobic expectations.

3. Beck and Clark’s Cognitive Content-Specificity Model

Under the cognitive theory of anxiety (Aaron Beck & David A. Clark), phobic disorders are driven by idiosyncratic cognitive schemas characterized by overestimating the probability and severity of threat, coupled with an underestimation of personal coping resources. SPQ-C items capture hyper-activated threat schemas wherein neutral or ambiguous stimuli (e.g., shadows in a closet, fruit displays) are automatically interpreted as harboring lethal or overwhelming arachnid threats.

7. Validity

The psychometric validity of the SPQ-C has been established across multiple independent studies spanning non-clinical school cohorts, experimental laboratory cohorts, and clinical outpatient populations:

Construct and Convergent Validity

In the foundational psychometric study conducted by Kindt, Brosschot, and Muris (1996), the SPQ-C was administered to a normative sample of 152 primary school children alongside established pediatric anxiety inventories. The SPQ-C exhibited robust convergent validity:

• Correlation with Animal Fear Dimensions: SPQ-C scores correlated strongly (r > .60, p < .001) with the Animal Fear subscale of the Dutch version of the Fear Survey Schedule for Children-Revised (FSSC-R).
• Convergence with Behavioral Avoidance Tasks (BAT): Klein, Becker, and Rinck (2009) demonstrated that SPQ-C scores strongly correlate with children’s actual approach behavior toward live spiders. Children scoring above established cutoffs on the SPQ-C displayed significantly greater terminal distance from a caged spider, higher anticipatory subjective units of distress (SUDS), and higher rates of early task termination.

Discriminant and Divergent Validity

The scale effectively discriminates between specific animal phobia and generalized, unrelated emotional distress. SPQ-C scores show modest to low correlations (r = .15 to .28) with generalized anxiety, depression, and social phobia inventories, indicating that the tool isolates specific spider fear rather than general negative affectivity or neuroticism. Furthermore, Kindt and Brosschot (1999) documented that high scorers on the SPQ-C did not demonstrate cognitive bias toward non-threat or general negative linguistic stimuli, confirming construct-specific cognitive reactivity.

Criterion and Predictive Validity

The SPQ-C reliably predicts experimental cognitive processing biases. In studies utilizing the linguistic and pictorial Spider Stroop paradigm, children classified as spider-phobic via the SPQ-C showed pronounced color-naming latency interference specifically when viewing spider-related words or spider photographs, whereas low-scoring control peers showed no such attentional slowing (Kindt & Brosschot, 1999).

8. Reliability

Empirical evaluations confirm that the SPQ-C possesses solid internal reliability and temporal stability:

• Internal Consistency: In the initial normative validation sample by Kindt et al. (1996), Cronbach’s alpha was calculated at α = .89. Subsequent independent studies by Klein, Rinck, and Becker (2009) confirmed high internal consistency coefficients ranging from α = .87 to α = .91 across diverse age cohorts.
• Test-Retest Reliability: Temporal stability assessed across a 2.5-year longitudinal follow-up yielded a test-retest correlation coefficient of r = .61 (p < .001). This level of stability is notable for a pediatric cohort spanning dynamic developmental stages (from age 8–10 to 11–13), indicating that while normative childhood fears fluctuate, relative trait vulnerability in spider fear remains moderately stable over years.
• Split-Half and Item Reliability: Corrected item-total correlations across the majority of items exceed .40, with only select reverse-scored items exhibiting slightly lower discriminatory power.

9. Factor Analysis

The structural dimensionality of the SPQ-C has been explored through both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA):

Exploratory Factor Structure

Principal component analyses (PCA) conducted by Kindt et al. (1996) revealed a dominant first factor that accounted for substantial common variance (eigenvalue > 6.5), supporting the psychometric practice of aggregating items into a single total score of spider fear severity. While secondary factors emerge when examining unrotated or obliquely rotated solutions—separating behavioral avoidance/escape from physiological fear and disgust—the strong inter-factor correlations (typically r > .55) indicate that a overarching general factor underpins the questionnaire.

Confirmatory Factor Models and Item Performance

Later investigations evaluating structural fit models (e.g., Klein et al., 2009) have compared unidimensional versus hierarchical multi-factor solutions:

• Unidimensional Model: Demonstrates acceptable fit indices (CFI > .90, RMSEA ≤ .06) when residual correlations between oppositely phrased (reverse-scored) items are accounted for.
• Loadings on Key Phobic Items: Items directly reflecting visceral somatic panic and extreme behavioral avoidance (e.g., Item 7: fear of touching; Item 11: feeling tense; Item 15: shivering; Item 20: running away) exhibit the highest standardized factor loadings (λ = .65 to .81).
• Function of Reverse-Scored Items: Positively phrased items (such as Item 6: enjoying watching spiders weave webs; Item 14: finding spiders useful; Item 26: admiring webs) load negatively onto the primary fear factor, confirming that lack of positive affective engagement is an integral component of the construct.

10. Instrument / Measurement Tool

• Instrument Name: Spider Phobia Questionnaire for Children
• Acronym: SPQ-C
• Target Population: Children and young adolescents aged approximately 8 to 15 years
• Administration Format: Self-report questionnaire (pencil-and-paper or digital assessment)
• Estimated Completion Time: 5 to 10 minutes
• Item Count: 29 items
• Response Scale: Dichotomous binary choice: True or Not true
• Scoring Rules:
  • Items reflecting fear, distress, or avoidance are scored: True = 1, Not true = 0. These items include: 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 15, 17, 18, 20, 21, 22, 23, 25, 27, 28, and 29.
  • Reverse-scored items reflecting calmness, enjoyment, tolerance, or positive evaluation are scored: True = 0, Not true = 1. These items are: 6, 12, 14, 16, 19, 24, and 26.
  • Total Score Range: 0 to 29 points.
  • Interpretation: Higher aggregate scores indicate elevated spider phobia severity. In clinical and experimental paradigms, scores exceeding 18–20 points commonly signify clinical-range arachnophobia, whereas scores below 6–8 reflect minimal or absent fear. Normative sex differences consistently indicate higher mean scores in girls compared to boys across all childhood age brackets.

11. Permissions & Fee and Test Year

The Spider Phobia Questionnaire for Children (SPQ-C) was developed and published in 1996 by Merel Kindt, Jos F. Brosschot, and Peter Muris. The original study was published in Behaviour Research and Therapy, an academic journal published by Elsevier. In accordance with standard conventions in clinical child psychology, the questionnaire was reproduced for research and clinical practice in Joel Fischer and Kevin J. Corcoran’s seminal reference sourcebook, Measures for Clinical Practice and Research: A Sourcebook (4th ed., 2007, Oxford University Press, Vol. 1, pp. 609–610).

The instrument is considered accessible for academic, clinical, and non-commercial research purposes without licensing fees, provided that appropriate bibliographic attribution is given to the original authors. For commercial software integration, commercial assessment platforms, or large-scale clinical trials requiring proprietary distribution, interested parties should consult the primary author or copyright clearance mechanisms.

12. References

• Fischer, J., & Corcoran, K. J. (2007). Measures for clinical practice and research: A sourcebook (4th ed., Vol. 1). Oxford University Press, pp. 609–610.
• Kindt, M., & Brosschot, J. F. (1999). Cognitive bias in spider-phobic children: Comparison of a pictorial and a linguistic spider Stroop. Journal of Psychopathology and Behavioral Assessment, 21(3), 207–220. https://doi.org/10.1023/A:1022137604471
• Kindt, M., Brosschot, J. F., & Muris, P. (1996). Spider Phobia Questionnaire for children (SPQ-C): A psychometric study and normative data. Behaviour Research and Therapy, 34(3), 277–282. https://doi.org/10.1016/0005-7967(95)00072-0
• Klein, A. M., Becker, E. S., & Rinck, M. (2009). Direct and indirect measures of spider fear predict unique variance in children’s fear-related behavior. Cognition & Emotion, 25(7), 1204–1213. https://doi.org/10.1080/02699931.2010.536551
• Klein, A. M., Rinck, M., & Becker, E. S. (2009). The Spider Anxiety and Disgust Screening for Children (SADS-C): Reliability and validity of a short measure of spider anxiety in children. Journal of Anxiety Disorders, 23(8), 1058–1064. https://doi.org/10.1016/j.janxdis.2009.07.007
• Klorman, R., Hastings, J. E., Weerts, T. C., Melamed, B. G., & Lang, P. J. (1974). Psychometric description of some specific-fear questionnaires. Behavior Therapy, 5(3), 401–409. https://doi.org/10.1016/S0005-7894(74)80008-0
• Muris, P., & Merckelbach, H. (2000). How serious are common childhood fears? Behaviour Research and Therapy, 38(3), 217–228. https://doi.org/10.1016/S0005-7967(99)00042-3
• Öhman, A., & Mineka, S. (2001). Fears, phobias, and preparedness: Toward an evolved module of fear and fear learning. Psychological Review, 108(3), 483–522. https://doi.org/10.1037/0033-295X.108.3.483
• Seligman, M. E. (1971). Phobias and preparedness. Behavior Therapy, 2(3), 307–320. https://doi.org/10.1016/S0005-7894(71)80064-3

13. Items of the Scale