Child Anxiety Life Interference Scale (CALIS)

Abstract

The Child Anxiety Life Interference Scale (CALIS) was developed in response to the common clinical practice of focusing solely on anxiety disorder symptoms for formal diagnosis, often neglecting the assessment of functional impairment. The CALIS provides a psychometrically supported method for comprehensively evaluating the functional impact, or life interference, that children’s anxiety has on their daily functioning, as well as the resulting burden on their parents’ lives. Developed at the Centre for Emotional Health at Macquarie University, the CALIS utilizes a multi-informant approach, gathering data from both the child and two distinct parental perspectives, thereby offering a holistic measure of impairment that is highly relevant to tracking treatment efficacy and client satisfaction.

Keywords

Child anxiety, life interference, functional impairment, psychological assessment, anxiety disorders, clinical utility, psychometrics, treatment outcome.

Authors

H. Lyneham, E. Sburlati, M. Abbott, R. Rapee, J. Hudson, D. Tolin, S. Carlson

Purpose

The primary purpose of the Child Anxiety Life Interference Scale (CALIS) is to provide a standardized, reliable, and valid tool for quantifying the degree to which a child’s anxiety interferes with critical life domains. Unlike traditional measures that prioritize symptom counts necessary for diagnosis, the CALIS emphasizes the functional consequences of anxiety, such as difficulties in social settings, school performance, or family routines.

The scale’s design allows clinicians and researchers to use multi-informant reports to gain a comprehensive understanding of the child’s experience and its systemic impact. By quantifying interference, the CALIS aids in establishing specific treatment goals, monitoring progress throughout intervention, and evaluating overall treatment success, particularly considering that reductions in life impairment are strongly correlated with client treatment satisfaction.

Construct

The CALIS measures the psychological construct of Anxiety Life Interference, often referred to as functional impairment or disability resulting from anxiety symptoms. This construct is defined by the degree to which anxiety prevents the child from engaging in typical, age-appropriate activities or fulfilling expected roles across various settings (e.g., home, school, social environment).

Importantly, the CALIS operationalizes this construct across three distinct perspectives: the child’s self-reported interference, the parents’ report of interference in the child’s life, and the parents’ report of interference in their own lives (due to the child’s anxiety). This multi-dimensional approach acknowledges that anxiety is a complex phenomenon with pervasive effects extending beyond the individual child.

Validity

The validity of the CALIS is supported by initial findings from the developmental study (Lyneham et al., 2013), which established it as a significant and valid measure of anxiety life interference within the tested population. The scale’s focus on functional impairment aligns with clinical outcomes, suggesting strong ecological and clinical validity. Furthermore, its ability to differentiate levels of impairment across multiple domains supports its utility in informing targeted treatment planning.

However, it is crucial to note that current validity data is derived exclusively from the initial evaluative study involving 622 Australian or American children diagnosed with anxiety disorders. Clinicians are advised to use and interpret the CALIS results with caution, pending broader validation studies, particularly those addressing potential impacts of cultural differences on the scale’s psychometric properties.

Reliability

The CALIS demonstrates robust reliability across multiple metrics, confirming its stability and consistency in measurement. The initial psychometric evaluation reported the following findings:

• Internal Consistency: The scale exhibited moderate internal consistency, indicating that the items within each subscale reliably measure the same underlying construct. Cronbach’s Alphas ranged from a satisfactory .84 for the child self-report scale to a strong .90 for the maternal report scale.
• Inter-rater Reliability: Moderate inter-rater reliability was observed between parents and children. This finding is consistent with existing literature (e.g., Niditch & Varela, 2011) suggesting inherent, yet predictable, differences in how children and parents perceive and report the functional impact of anxiety.
• Test-retest Reliability: The CALIS demonstrated strong test-retest reliability. Significant correlations were produced when the scale was administered before and after a waitlist period, confirming the stability of the measure over time when clinical status is unchanged.

Factor Analysis

The provided source content does not explicitly detail the results of a formal factor analysis (e.g., Exploratory or Confirmatory Factor Analysis) used to determine the underlying latent structure of the CALIS items. However, the scale is structured around three distinct administrative scales (Child Self-Report, Parent Report on Child’s Life, Parent Report on Parent’s Life), suggesting an intended multi-dimensional or multi-informant structure based on clinical logic rather than purely statistical factor extraction.

Instrument

Test Type: Clinical rating scale; Multi-informant psychological assessment.

Format: Paper-and-pencil or digital self-report/parent-report questionnaire.

Language Available: English (Original development).

Population Group: Children and adolescents with anxiety disorders and their parents/caregivers.

Age Group: Children aged 6 to 17 years.

Population Details: The initial standardization sample consisted of 622 Australian or American children diagnosed with anxiety disorders. The scale is designed to be used in clinical settings alongside symptom-specific scales.

Test Methodology: The CALIS is comprised of three separate components: one 10-item scale for the child (self-report) and two 9-item scales for the parent (Child Interference and Parent Interference). All items are rated on a five-point Likert scale, where 0 represents not at all and 4 represents a great deal. Higher scores indicate greater anxiety life interference.

Keywords

CALIS, Macquarie University, functional impairment, psychological measure, treatment monitoring, parental burden, clinical assessment, Cronbach’s Alpha, child psychology.

Authors

Author ORCID Identifier: Not provided in source material.

Affiliation Email addresses: Not provided in source material.

Correspondence Address: Developed at the Centre for Emotional Health, Macquarie University, Sydney, Australia.

Permissions & Fee and Test Year

The Child Anxiety Life Interference Scale (CALIS) was first published and documented in 2013 by Lyneham et al. The scale is noted to be freely available for use. The original availability information directs users to the developing institution. The scale is freely available from: http://www.mq.edu.au/

Reference’s

Lyneham, H., Sburlati, E., Abbott, M., Rapee, R., Hudson, J., Tolin, D., & Carlson, S. (2013). Psychometric properties of the Child Anxiety Life Interference Scale (CALIS). Journal of Anxiety Disorders, 27(7), 711-9. doi: 10.1016/j.janxdis.2013.09.008

Niditch, L., & Varela, R. (2011). Mother-child disagreement in reports of child anxiety: Effects of child age and maternal anxiety. Journal of Anxiety Disorders, 25(3), 450-5. doi: 10.1016/j.janxdis.2010.11.009

Items of the Child Anxiety Life Interference Scale (CALIS)

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

Items relate to common activities, including examples such as:

• “being with friends outside of school”
• “your career choice”