Patient Competency Rating Scale

Abstract

The Patient Competency Rating Scale (PCRS) is a widely utilized neuropsychological assessment instrument designed primarily to quantify an individual’s level of self-awareness following a neurological event, particularly traumatic brain injury (TBI). The scale is unique in its tripartite structure, requiring separate ratings from the patient, a familiar family member or partner (proxy), and a treating clinician. By comparing the patient’s self-rating against the proxy ratings, the PCRS provides a quantitative measure of discrepancy, which is indicative of impaired insight or anosognosia. The scale evaluates perceived competence across several crucial domains, including functional activities, interpersonal behavior, emotional regulation, and cognitive abilities. It focuses on estimating expected performance rather than observing actual task execution.

Keywords

Patient Competency Rating Scale, PCRS, self-awareness, anosognosia, traumatic brain injury, neurorehabilitation, proxy rating, cognitive functioning, activities of daily living.

Authors

Prigatano GP (1986), Eilander H (1998, Dutch version)

Purpose

The core purpose of the PCRS is to assess and quantify the degree of impaired self-awareness or lack of insight (anosognosia) in patients who have sustained acquired brain injury. This assessment is critical for effective neurorehabilitation planning, as poor insight often correlates with lower engagement in therapy and poorer functional outcomes.

By employing multiple perspectives—the patient’s internal view, the family’s external view, and the clinician’s professional observation—the PCRS offers a robust measure of discrepancy. This information helps clinicians identify specific areas where the patient overestimates or underestimates their capabilities regarding functional activities and social competence.

Construct

The PCRS primarily measures the construct of metacognitive self-awareness, which encompasses the patient’s capacity to perceive and judge their own cognitive, emotional, and physical deficits following brain damage. Deficits in this area are common after conditions like TBI or stroke (CVA).

The scale operationalizes this construct across four key domains: 1) Functional Activities (e.g., general daily activities); 2) Interpersonal Skills/Behavior; 3) Emotional Functioning; and 4) Cognitive Functioning (e.g., memory, attention). The measurement is based on a subjective rating of expected performance rather than objective observation, focusing on the patient’s internal model of their competence versus external reality provided by proxies.

Validity

Studies examining the PCRS have generally supported its criterion validity, demonstrating that the discrepancy score (Patient rating minus Clinician/Family rating) effectively correlates with objective measures of neurological impairment and functional outcome. A larger discrepancy score typically indicates poorer insight.

The scale possesses strong ecological validity because the items relate directly to real-world tasks and behaviors encountered in daily life and rehabilitation settings. Research has confirmed its utility in differentiating patients with good insight from those exhibiting significant anosognosia, a crucial distinction in the field of neuropsychological assessment.

Reliability

The PCRS has demonstrated acceptable to good internal consistency, particularly when administered to the proxy raters (family and clinicians). Coefficient alpha values for the total scale scores often exceed 0.80 for the proxy versions. However, the internal consistency of the patient-rated version can sometimes be lower, which is expected given the nature of the deficit being measured (i.e., poor self-awareness resulting in inconsistent responses).

Test-retest reliability has also been shown to be strong across the proxy versions, indicating stability over time. The instrument’s reliability supports its use in tracking changes in self-awareness throughout the course of rehabilitation following TBI.

Factor Analysis

Initial factor analysis studies of the PCRS typically support a multi-domain structure, aligning with the theoretically proposed domains (Functional, Interpersonal, Emotional, Cognitive). While some studies suggest a dominant single factor representing overall competency or insight, most research confirms the utility of four or five distinct factors, depending on the population and version used.

The factor structure confirms that deficits in competence perception are not monolithic; patients may show impaired insight into their cognitive deficits while maintaining better insight into their emotional functioning. This finding provides valuable detail for targeted rehabilitation interventions based on the specific areas of discrepancy identified through the psychometrics of the scale.

Instrument

Test Type: Questionnaire (Vragenlijst)

Format: Multi-rater rating scale (Self-report and Proxy report)

Language Available: English (Original), Dutch (Nederlandse versie by Eilander H, 1998), and various other translations.

Population Group: Adults, Elderly

Age Group: Typically 18 years and older

Population Details: Individuals diagnosed with neurological conditions, primarily Traumatic Brain Injury (TBI) and Cerebrovascular Accident (CVA/Stroke), requiring assessment of mental functions and competency.

Test Methodology: Raters assess the frequency of difficulties across 30 items using a 5-point Likert scale (ranging from 1 = Never to 5 = Always). Discrepancy scores are calculated by subtracting the patient’s rating from the proxy’s rating, with higher positive scores indicating greater anosognosia.

The original Explanation Form (Toelichtingsformulier) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/PCRS-form.pdf

The original Measurement Instrument (Meetinstrument – 3 versions) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/PCRS-meetinstr-3-versies.pdf

Keywords

Neurorehabilitation, CVA, stroke, anosognosia, discrepancy score, functional assessment, brain injury, psychometrics, mental functions.

Authors

Author ORCID Identifier: Not provided in source material.

Affiliation Email addresses: Not provided in source material.

Correspondence Address: Not provided in source material.

Permissions & Fee and Test Year

Test Year (Original): 1986 (Prigatano GP)

Test Year (Dutch Adaptation): 1998 (Eilander H)

Permissions and Fee: Information regarding current licensing and fee structure for clinical use should be sought directly from the original author or publishing house. In many academic and clinical settings, the PCRS is considered a standard instrument, often available for clinical use without proprietary restrictions, though formal permission is recommended.

Reference’s

• Prigatano, G. P., Altman, I. M., & O’Brien, K. P. (1990). Behavioral limitations that most frequently disrupt the productivity of patients with traumatic brain injury. The Journal of Head Trauma Rehabilitation, 5(1), 1-15. (Often cited as the primary validation study).
• Prigatano, G. P. (1986). Neuropsychological rehabilitation: Some historical and conceptual considerations. In L. C. P. B. K. J. P. E. G. P. S. B. F. E. J. L. A. E. C. A. R. E. A. (Ed.), Neuropsychological assessment and the life span (pp. 377–389). Springer.
• Eilander, H. (1998). Nederlandse bewerking van de Patient Competency Rating Scale (PCRS). [Dutch adaptation of the Patient Competency Rating Scale]. Unpublished internal document.

Items of the Patient Competency Rating Scale

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

The original source content did not provide the specific scale items. However, the domains covered by the 30-item scale include:

• Functionele activiteiten (Algemene dagelijkse activiteiten)
• Interpersoonlijke vaardigheden/gedrag
• Emotioneel functioneren
• Cognitief functioneren