Katz Adjustment Scales (KAS)

Abstract

The Katz Adjustment Scales (KAS), developed by Katz and Lyerly in 1963, constitute a set of inventories specifically designed for the comprehensive assessment of adjustment and social behavior among pre-psychotic and ex-hospital psychiatric patients residing in the community. The strength of the KAS lies in its utilization of dual perspectives: ratings are gathered from both the patient and a close relative, thereby offering a more holistic view of the patient’s overall functioning.

The KAS is composed of multiple forms, including Form R1 (Relative’s Ratings of Patient Symptoms and Social Behavior) and Form S1 (Symptom Discomfort). These forms systematically measure critical domains such as symptomatology, free-time activities, and satisfaction with daily life. Initial validation studies demonstrated reasonably high internal consistency and stable relationships between the various measures, supporting its utility in clinical research, particularly concerning functional ability.

Keywords

Katz Adjustment Scales, KAS, Patient Functioning, Relative Forms, Social Behavior, Clinical Adjustment, Pre-Psychotic Patients, Ex-Hospital Patients, Discriminative Validity, Symptom Discomfort.

Authors

Katz, Martin M., Lyerly, Samuel B.

Purpose

The primary purpose of the KAS is to provide a standardized, multifaceted assessment of an individual’s ability to function effectively outside of a hospital setting. It is specifically tailored to capture the nuances of community integration and psychological status among individuals who have suffered or are at risk of suffering from significant mental illness.

By soliciting input from both the patient and a relevant family member or caregiver, the scale aims to identify discrepancies in perception regarding the patient’s symptoms, social competence, and overall satisfaction. This dual assessment approach is crucial for clinical planning and evaluating the efficacy of community-based treatments for psychiatric patients.

Construct

The central psychological construct measured by the Katz Adjustment Scales is Functional Ability, defined broadly to encompass the patient’s capacity for successful community living. This construct is operationalized through several sub-domains:

• Symptomatology: The presence and severity of psychological distress (e.g., Form S1).
• Social Behavior: The quality and quantity of interactions and relationships (e.g., Form R1).
• Free-Time Activities: Engagement in constructive or satisfying leisure pursuits.
• Adjustment: Overall perceived success and satisfaction in adapting to non-institutional environments.

Validity

Validation efforts for the KAS focused heavily on establishing its ability to differentiate between groups, supporting its discriminative validity. The original research demonstrated that the various measures within the KAS framework maintained stable and predictable relationships with one another, suggesting that the different forms measure related but distinct aspects of community functioning.

While the initial publication by Katz and Lyerly (1963) confirmed the utility of the scale in distinguishing between different levels of community functioning in psychiatric patients, detailed psychometric analyses regarding convergent or criterion validity beyond internal consistency were not extensively documented in the foundational work.

Reliability

The reliability of the Katz Adjustment Scales was evaluated using a cross-validation sample, where the measures exhibited reasonably high levels of internal consistency. High internal consistency suggests that the items designed to measure the same underlying construct are highly correlated with each other, ensuring homogeneity within the subscales.

Although specific Cronbach’s alpha values are not provided in the summary, the reported consistency indicates that the KAS provides stable and reliable measurements of adjustment and behavior across multiple forms and perspectives (patient versus relative).

Factor Analysis

Based on the foundational documentation, no formal factor analysis data was indicated or published for the initial development of the Katz Adjustment Scales. This means the underlying dimensional structure of the scale—how the various items cluster into specific factors—was not empirically confirmed using methods such as exploratory or confirmatory factor analysis at the time of its introduction. Researchers utilizing later versions of the KAS should consult subsequent literature for updated factor structure reports.

Instrument

Test Type: Rating Scale

Format: Items in the inventories are rated on 3- and 4-point scales, depending on the specific form (e.g., frequency or discomfort levels).

Language Available: English (Original)

Population Group: Human; Male; Female; Outpatient

Age Group: Adulthood (18 years and older)

Population Details: The scale was developed and validated primarily using a sample of psychiatric patients, particularly those who were pre-psychotic or recently discharged from institutional care (ex-hospital patients).

Test Methodology: Paper-and-pencil administration. The instrument consists of five distinct forms designed for assessment from both the patient’s perspective and the relative’s perspective, resulting in a dual-report structure. The total number of items varies across the five forms.

Keywords

Functional Ability, Rating Scale, Internal Consistency, Ex-Hospital Patients, Symptomatology, Clinical Assessment, Psychometrics, Community Functioning, Psychological Reports.

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: Not provided in source content.

Correspondence Address: Martin M. Katz was affiliated with the National Institute of Mental Health Psychopharmacology Service Center; Samuel B. Lyerly was affiliated with the Human Ecology Fund.

Permissions & Fee and Test Year

The original research detailing the scale development was published in 1963. To access the proprietary test items or to utilize the full instrument for research or clinical purposes, users must contact the original publisher or rights holder. The source content indicates that Test Items are not readily available for public distribution without permission.

Reference’s

Katz, M. M., & Lyerly, S. B. (1963). Methods for measuring adjustment and social behavior in the community: I. Rationale, description, discriminative validity and scale development. Psychological Reports, 13(2), 503–535. The DOI link for the original article is: https://doi.org/10.2466/pr0.1963.13.2.503

Items of the Katz Adjustment Scales (KAS)

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

Test Items Available: No (To access the test items, contact the publisher.)