Penn State Worry Questionnaire for Adults (PSWQ-A)

Abstract

The Penn State Worry Questionnaire for Adults (PSWQ) is the most widely utilized 16-item self-report questionnaire designed to assess trait pathological worry in adult populations. Developed in the United States in 1990 by Meyer, Miller, Metzger, and Borkovec, the instrument measures an individual’s disposition toward worry, encompassing its frequency, intensity, and tendency toward generalization. Although the PSWQ is not a definitive diagnostic tool, it serves as an effective screening instrument for detecting chronic worry patterns and is particularly valuable in differentiating Generalized Anxiety Disorder (GAD) from other anxiety-related conditions. The scale demonstrates robust psychometric properties, including high internal consistency and strong convergent and discriminant validity across diverse samples.

Keywords

PSWQ, pathological worry, trait anxiety, Generalized Anxiety Disorder, GAD screening, psychological assessment, self-report, psychometrics.

Authors

Thomas J. Meyer, Mark L. Miller, Robert L. Metzger, Thomas D. Borkovec.

Purpose

The primary purpose of the PSWQ is to provide a reliable and valid quantitative measure of an individual’s disposition for chronic and excessive worry, often referred to as trait pathological worry. It was specifically developed to capture the core features of excessive worry that characterize conditions like Generalized Anxiety Disorder.

While not intended as a formal diagnostic instrument, the scale is widely employed in clinical and research settings as a screening tool to identify individuals exhibiting high levels of pathological worry. Furthermore, the PSWQ is highly sensitive to treatment-related changes, making it invaluable for evaluating the efficacy of therapeutic interventions aimed at reducing worry over time (Meyer et al., 1990).

Construct

The PSWQ measures the psychological construct of trait worry, which is defined as a stable, generalized disposition or tendency to engage in excessive, uncontrollable, and chronic worry across various life domains. This construct goes beyond typical, everyday worrying to capture the debilitating nature of pathological worry that is often central to anxiety disorders.

The 16 items were derived from a comprehensive factor analysis of 161 items hypothesized to be related to worry. The resulting scale effectively quantifies the frequency, intensity, and extent to which worry is generalized, reflecting a pervasive cognitive style associated with anxiety disorders.

Validity

The PSWQ has demonstrated consistently high validity across numerous studies involving clinical and community samples. Its criterion validity is evidenced by its successful ability to distinguish GAD patients (who typically score above 50) from individuals presenting with other anxiety disorders, such as Post Traumatic Stress Disorder (Brown, Antony, & Barlow, 1992).

Regarding Convergent Validity, the PSWQ correlates highly with established measures of worry, including The Worry Domains Questionnaire (r=.67) and the student worry scale (r=.59). Discriminant Validity is also strong, as the PSWQ shows significant, yet moderate, correlations with measures of related but distinct constructs, specifically anxiety and depression. Correlations were observed with the State-Trait Anxiety Inventory (trait r= .64-.79; state r = .49) and the Beck Depression Inventory (r= .36-.62).

The scale has also proven valid in diverse cross-cultural populations, maintaining good psychometric properties in samples from Korea, India, and Germany, suggesting its generalizability extends beyond American populations. However, age is a factor that influences scores, with older adults consistently reporting significantly lower scores than younger adults in both community and clinical settings.

Reliability

The PSWQ exhibits strong internal reliability across various adult cohorts, including undergraduates, community members, and older adults diagnosed with GAD. Cronbach’s alpha coefficients consistently fall within the excellent range, spanning from .88 to .95, indicating high internal consistency among the items (Startup & Erickson, 2006).

Favorable Test-Retest Reliability has been established in younger samples, demonstrating a strong correlation coefficient of r=0.92 over an 8-10 week interval in college students. However, reliability findings are less consistent in older adult populations, where the scale has demonstrated poor test-retest reliability, potentially limiting its accuracy for assessing stable trait worry in this specific age group (Davey & Wells, 2006).

Factor Analysis

The Penn State Worry Questionnaire was initially developed based on a factor analysis of 161 items thought to be related to worry. This rigorous process aimed to distill the core components of pathological worry into a concise, 16-item measure.

The resulting PSWQ is generally treated as a single-factor instrument measuring the severity and generality of worry. While research confirms its sound unidimensional structure for assessing chronic worry, subsequent studies, particularly those involving older adults, have explored abbreviated models and confirmatory factor analyses to ensure the structure remains psychometrically stable across all demographic groups (Hopko et al., 2003).

Instrument

Test Type: Self-Report Questionnaire

Format: 16-item scale utilizing a 5-point Likert scale response format.

Language Available: English, Korean, German, and others based on documented cross-cultural validation studies.

Population Group: Adults.

Age Group: Primarily younger and middle-aged adults; also used with older adults, though caution regarding test-retest reliability is necessary.

Population Details: Used across clinical samples (e.g., GAD, depression) and non-clinical samples (e.g., community samples, undergraduates).

Test Methodology: Respondents rate each item from 1 (“not at all typical of me”) to 5 (“very typical of me”). Scores from each item are summed to yield a total score ranging from 16 to 80. Higher scores represent higher levels of pathological worry. Eleven items are positively scored, while five items require reverse scoring.

Keywords

Trait worry, GAD assessment, psychometric soundness, screening tool, clinical psychology, cognitive bias, emotional regulation, anxiety assessment.

Authors

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

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

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

Permissions & Fee and Test Year

The PSWQ was initially developed and validated in 1990 (Meyer et al., 1990). Information regarding specific fees or current permissions for commercial use is not detailed in the original source material. However, as a highly cited and frequently used instrument, it is commonly employed in academic research and clinical practice. Researchers and clinicians seeking formal usage guidelines should consult the original authors or the publisher of the validation paper.

Reference’s

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Items of the Penn State Worry Questionnaire for Adults (PSWQ-A)

The PSWQ consists of 16 items rated on a 5-point Likert scale. Eleven items are positively scored in the direction of pathological worry, while the remaining five items are reverse-scored.

• Example of positively scored item: “my worries overwhelm me“
• Example of reverse scored item: “I never worry about anything“