Spence Children’s Anxiety Scale (SCAS) – Parent Version

Abstract

The Spence Children’s Anxiety Scale (SCAS) – Parent Version is a highly respected and widely utilized psychometric instrument designed for the assessment of anxiety symptoms in children and adolescents, aged primarily 8 to 15. This parent-report measure allows primary caregivers to evaluate the frequency and severity of their child’s anxiety manifestations over the preceding six months. Developed by Susan H. Spence, the SCAS is theoretically grounded in the diagnostic criteria of the Diagnostic and Statistical Manual of Mental Disorders (DSM), particularly focusing on six clinically relevant dimensions of youth anxiety. The instrument serves as an efficient and valid tool for clinical screening, supporting differential diagnosis, and monitoring treatment efficacy for various child anxiety disorders.

Keywords

SCAS, Parent Report, Childhood Anxiety, Separation Anxiety, Social Phobia, Panic Attack, Generalized Anxiety Disorder, Obsessive-Compulsive Disorder, Psychometric Scale, Child Mental Health, Screening Tool.

Authors

Susan H. Spence, Nauta, Scholing, Rapee, Abbott, Waters, McDonald, Ingram, Barrett, Turner, Mousavi, Moradi, Farzad, Mahdavi.

Purpose

The primary objective of the SCAS Parent Version is to provide a standardized, reliable, and valid means of quantifying anxiety symptoms in youth from an external, observational viewpoint. By relying on parent reports, the scale captures behavioral and emotional manifestations of anxiety that may be externalized or observable in different settings, such as home or school. This perspective is vital as it complements the child self-report version, often revealing symptoms that the child may lack the insight to recognize, minimize, or accurately report.

In clinical practice, the scale is instrumental in identifying children whose symptoms meet or exceed established clinical thresholds for specific anxiety disorders, thereby guiding early intervention and treatment planning. Furthermore, in research contexts, the SCAS Parent Version provides a robust outcome measure for evaluating the longitudinal efficacy and effectiveness of various psychological and pharmacological treatments aimed at reducing youth anxiety.

Construct

The SCAS Parent Version measures the latent construct of childhood anxiety, which is organized into six distinct first-order factors designed to correspond directly with the DSM-IV and subsequent revisions of anxiety disorder classification. This structure ensures that the assessment captures the full, heterogeneous spectrum of anxiety presentation in young people.

The six theoretical factors assessed, which combine to form a comprehensive total anxiety score, are:

• Panic attack and agoraphobia (focusing on somatic symptoms and fears of public spaces).
• Separation anxiety (concerns about being away from primary attachment figures or home).
• Physical injury fears (Specific Phobia type, including fears of medical procedures, animals, or heights).
• Social phobia (fear of negative evaluation and performance anxiety).
• Obsessive-Compulsive Disorder (assessing intrusive thoughts and compulsive, repetitive behaviors).
• Generalized anxiety disorder / Overanxious disorder (measuring non-specific, pervasive worry and associated physical complaints).

Validity

The SCAS Parent Version demonstrates strong evidence of Construct validity, supported by extensive research across diverse international samples, including foundational studies by Nauta et al. (2004) and Spence et al. (2003). The intended six-factor structure, which maps onto the DSM classification system, has been consistently confirmed through the use of Confirmatory Factor Analysis (CFA).

Convergent validity is established by showing significant positive correlations between SCAS scores and scores derived from other established measures of child internalizing problems, such as the Revised Children’s Manifest Anxiety Scale (RCMAS) and internalizing subscales of the Child Behavior Checklist (CBCL). Conversely, Discriminant validity is evidenced by low or moderate correlations with measures assessing non-anxiety psychopathology (e.g., externalizing behaviors), confirming that the scale accurately isolates and measures anxiety constructs specifically.

Reliability

The reliability of the SCAS Parent Version is consistently reported as high across both clinical and non-clinical populations. The measure exhibits excellent internal consistency, with Cronbach’s alpha coefficients for the subscales typically ranging from 0.70 to 0.90, and the total anxiety score frequently achieving coefficients above 0.90, indicating strong homogeneity among the items within each construct.

Furthermore, the scale demonstrates robust Test-retest reliability over various time intervals, highlighting the stability of the measure when assessing chronic conditions like Generalized Anxiety Disorder. Adequate inter-rater reliability has also been observed, suggesting that different parents or caregivers reporting on the same child tend to produce consistent scores, although this metric can sometimes be influenced by variability in parental awareness or reporting bias.

Factor Analysis

The psychometric foundation of the SCAS Parent Version rests heavily on factor analytic techniques, stemming from Susan H. Spence’s initial structural work in 1997. The use of Confirmatory Factor Analysis (CFA) has been critical in validating the measure, consistently supporting a highly robust six-factor model structure that accurately mirrors established DSM nosology for childhood anxiety.

The established factor groupings, which provide a clear clinical profile, are:

1. Panic attack and agoraphobia (Items 12, 19, 25, 27, 28, 30, 32, 33, 34)
2. Separation anxiety (Items 5, 8, 11, 14, 15, 38)
3. Physical injury fears (Specific Phobia) (Items 2, 16, 21, 23, 29)
4. Social phobia (Items 6, 7, 9, 10, 26, 31)
5. Obsessive compulsive disorder (Items 13, 17, 24, 35, 36, 37)
6. Generalized anxiety disorder / overanxious disorder (Items 1, 3, 4, 18, 20, 22)

Instrument

Test Type: Parent-report questionnaire / Screening and Diagnostic Aid

Format: 4-point Likert scale, ranging from 0 (Never) to 3 (Always). The instrument comprises 38 scored items corresponding to the six subscales, plus 4 additional open-ended items for supplementary qualitative data.

Language Available: English (Original), with validated translations available in numerous languages including Dutch, Iranian/Farsi, and Spanish.

Population Group: Clinical and non-clinical populations of children and adolescents.

Age Group: Primarily validated for children aged 8 to 15 years, although the core structure is applicable for assessing school-aged youth, and adapted versions exist for preschoolers.

Population Details: The scale is administered to parents or primary caregivers who respond based on their direct observations of the child’s behavior and emotional state over the past six months.

Test Methodology: This is a quantitative, self-administered questionnaire. Scoring involves summing the item responses to calculate scores for each of the six subscales, and subsequently deriving a total anxiety score. Higher scores uniformly indicate greater severity and frequency of anxiety disorders symptoms.

Keywords

Psychological assessment, Child mental health, Pediatric psychology, CFA, Screening tool, Anxiety symptoms, DSM-IV, Clinical threshold, Psychometrics, Parent Rating Scale.

Authors

Author ORCID Identifier: N/A (Information not provided in source)

Affiliation Email addresses: N/A (Information not provided in source)

Correspondence Address: N/A (Information not provided in source)

Permissions & Fee and Test Year

The Spence Children’s Anxiety Scale instrument is widely recognized for its accessibility. It is generally made available for non-commercial research and standard clinical use without requiring a fee, often downloadable directly from the author’s affiliated academic websites. The initial core structure and factor model were developed and published by Spence in 1997. The specific validation and psychometric properties of the Parent Report measure were primarily established and published around the early 2000s (e.g., Nauta et al., 2004).

The official resource for the instrument and related information can be accessed online: http://www.scaswebsite.com/1_1_.html

Reference’s

• Nauta, Scholing, Rapee, Abbott, Spence and Waters. (2004). A parent report measure of children’s anxiety. Behaviour Research and Therapy. 42 (7), 813-839.
• Spence. S.H., (1997). Structure of Anxiety Symptoms Among Children: A Confirmatory Factor-Analytic Study. J Abnorm Psych 106(2): 280-297.
• Spence, S.H., Rapee, R., McDonald, C., & Ingram, M. (2001). The structure of anxiety symptoms among preschoolers. Behaviour Research and Therapy, 39, 1293 – 1316.
• Spence. S.H, Barrett. P.M, Turner. C.M. (2003). Psychometric Properties of the Spence Children’s Anxiety Scale with Young Adolescents. J Anxiety Disord 17(6): 605-625.
• Mousavi, R., Moradi, A.R., Farzad, V., Mahdavi, E., Spence, S., (2007), Psychometric Properties of the Spence Children’s Anxiety Scale with an Iranian Sample, International psychology journal, 1(1), 1-16.

Items of the Spence Children’s Anxiety Scale (SCAS) – Parent Version

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.