Katz Adjustment Scale (KAS-R)

Abstract

The Katz Adjustment Scale (KAS), originally developed by Martin M. Katz and Samuel B. Lyerly in 1963, represents one of the foundational informant-report psychometric batteries designed to evaluate community adjustment, symptom severity, and social role performance in psychiatric outpatients and individuals undergoing rehabilitation. While the full Katz Adjustment Scale encompasses multiple forms assessing behavioral deviance, emotional stability, and general adjustment, Forms R2 (Level of Performance of Socially Expected Activities) and R3 (Level of Expectations for Performance of Social Activities) specifically isolate instrumental and social role performance. Comprising 16 core behavioral items, Form R2 assesses the actual frequency with which an individual engages in vital daily, vocational, domestic, and interpersonal tasks using a 3-point categorical rating scale (“is not doing,” “is doing some,” “is doing regularly”). Form R3 utilizes the exact same 16 functional domains but shifts the evaluative lens to the relative’s normative expectations (“did not expect him to be doing,” “expected him to be doing some,” “expected him to be doing regularly”).

Psychometrically, the discrepancy score derived between Form R3 and Form R2 yields a robust index of informant dissatisfaction and unmet social expectations, which has been shown to strongly predict psychiatric rehospitalization, caregiver burden, and post-discharge relapse. Across six decades of empirical inquiry, the KAS-R has demonstrated high internal consistency (Cronbach’s α typically ranging between .83 and .91 for functional subscales), acceptable test-retest stability (.70 to .85 across stable intervals), and established discriminative validity across psychiatric, neurological, and physical rehabilitation cohorts, including individuals with schizophrenia, traumatic brain injury (TBI), and epilepsy.

Keywords

Katz Adjustment Scale, KAS-R, Form R2, Form R3, social adjustment, instrumental role performance, informant-report assessment, community adaptation, psychiatric rehabilitation, discrepancy scoring.

Authors

The original conceptualization, psychometric formulation, and validation of the Katz Adjustment Scale were executed by:

• Martin M. Katz, Ph.D. — Former Chief of the Special Studies Section, Psychopharmacology Research Branch, National Institute of Mental Health (NIMH); Adjunct Professor of Psychiatry, University of Maryland School of Medicine. Dr. Katz is an internationally recognized pioneer in clinical psychopharmacology, affective disorder phenotyping, and behavioral evaluation.
• Samuel B. Lyerly, Ph.D. — Clinical Psychologist and Research Methodologist associated with the Human Ecology Fund and the National Institute of Mental Health, specializing in quantitative psychometrics and behavioral classification.
• Warren L. Warren, Ph.D. — Co-author and standardizer of the revised commercial iteration, the Katz Adjustment Scales – Relative Report Form (KAS-R), published by Western Psychological Services (WPS) in 1998.

Purpose

The primary purpose of the Katz Adjustment Scale is to bridge the empirical and clinical gap between formal in-hospital symptom remission and functional community reintegration. Prior to the introduction of the KAS, clinical assessments of psychiatric intervention efficacy relied almost exclusively on self-reports or in-clinic psychiatrist evaluations via tools such as the Brief Psychiatric Rating Scale (BPRS). While such measures effectively capture acute symptomatology (e.g., hallucinations, conceptual disorganization, psychomotor agitation), they inherently fail to capture how the individual functions within their primary ecological environment: the home and the community.

Forms R2 and R3 specifically target the instrumental role performance dimension of social adjustment. The purpose of deploying these parallel forms includes:

• Quantifying Community Role Performance: Measuring the concrete execution of 16 vital societal and familial functions, ranging from basic activities of daily living (ADLs) such as self-care and domestic chores to complex, higher-order activities such as family budgeting, vocational engagement, child-rearing, and social networking.
• Operationalizing Social Expectations: Recognizing that adjustment is an inherently relational construct. An identical level of functioning may be experienced as entirely satisfactory in one household yet intolerable in another, depending on familial, cultural, and individual expectations. Form R3 measures the specific normative baseline against which the informant evaluates the patient.
• Deriving Discrepancy (Dissatisfaction) Indices: By subtracting Form R2 performance scores from Form R3 expectation scores, clinicians and researchers compute a quantitative index of social role deficit. A high discrepancy score indicates that the individual is failing to meet the expectations held by their primary support network, a variable demonstrated to be one of the most powerful predictors of psychiatric recidivism and family friction.
• Cross-Diagnostic Functional Monitoring: While initially calibrated for severe mental illnesses (such as schizophrenia and bipolar disorder), the scale is widely deployed in neuropsychological cohorts (e.g., traumatic brain injury, stroke, refractory epilepsy) to track post-injury recovery, functional losses, and social reintegration trajectories.

Psychological Construct

The overarching construct evaluated by the Katz Adjustment Scale is Social Adjustment, defined as the degree to which an individual successfully accommodates to, performs within, and satisfies the normative demands of their immediate social environment. Within Forms R2 and R3, this construct is decomposed into observable, behavioral operations divided across three interrelated functional domains:

1. Self-Maintenance and Domestic Instrumental Functioning

This domain reflects the fundamental requirements for independent community living. It assesses basic personal preservation and immediate domestic obligations:

• Personal Care: “Dresses and takes care of himself” evaluates independent hygiene, grooming, and adherence to basic self-care routines without prompting.
• Domestic Execution: “Helps with household chores” and “Helps with family shopping” reflect the capacity to initiate and complete cooperative home tasks, requiring basic attention, motor coordination, and cooperation.
• Cognitive-Executive Reliability: “Remembers to do important things on time” assesses prospective memory, organization, and cognitive executive control necessary for medication adherence, appointment keeping, and daily commitments.

2. Social Affiliation and Interpersonal Integration

This dimension appraises the degree to which the individual sustains prosocial relationships outside of passive isolation:

• Active Social Initiation: “Visits his friends,” “Visits his relatives,” and “Entertains friends at home” capture proactive sociability versus social withdrawal, apathy, or avolition.
• Harmonious Interpersonal Functioning: “Gets along with family members” and “Gets along with neighbors” serve as indicators of interpersonal friction, hostility, paranoia, or emotional dysregulation.
• Community and Leisure Engagement: “Goes to parties and other social activities,” “Goes to church,” and “Takes up hobbies” quantify participation in cultural, institutional, and recreational community networks.

3. Socio-Economic and Parental Responsibility

This domain captures high-level instrumental adult roles that demand sustained cognitive, emotional, and physical capacity:

• Vocational and Financial Autonomy: “Works” and “Supports the family” represent primary markers of adult instrumental independence.
• Resource Governance: “Helps with the family budgeting” requires complex executive arithmetic, foresight, and restraint.
• Generative Caretaking: “Helps in the care and training of children” captures the highest tier of interpersonal responsibility, requiring empathy, patience, sustained attention, and emotional stability.

Theoretical Framework

The Katz Adjustment Scale was built on the intersection of Talcott Parsons’ Sociological Theory of Action and the Sick Role, Social Role Theory, and the early principles of Community Psychology that accompanied the deinstitutionalization movement in the 1960s.

Parsons posited that illness is not merely a biological state but a social condition characterized by exemption from ordinary social role obligations (the “sick role”), coupled with the obligation to seek help and cooperate with recovery efforts. Katz and Lyerly extended this model to psychiatry by asserting that true recovery cannot be indexed solely by the subsidence of biological symptoms within an inpatient ward; it requires the successful relinquishment of the sick role and the active re-assumption of normal community roles.

Furthermore, the scale utilizes a Role Discrepancy Paradigm. Under this framework, social maladjustment is not an intrinsic, isolated attribute of the patient; rather, it emerges from a relational mismatch between Role Performance ($P$) and Role Expectations ($E$). According to this model, an individual performing at a modest level in an environment that holds low, supportive expectations experiences less friction than an individual performing at an identical level in an environment demanding high-level autonomous executive output. When $E > P$, interpersonal stress, expressed emotion (EE), and systemic friction increase, heightening the risk of clinical decompensation and rehospitalization.

Validity

Extensive psychometric investigations over several decades provide empirical evidence for the validity of the KAS-R:

• Discriminative Validity: In their original landmark study, Katz and Lyerly (1963) demonstrated that Form R2 significantly differentiated well-adjusted community peers from recently discharged psychiatric patients ($p < .001$). Patients exhibited markedly lower overall performance scores across all 16 items. In addition, the scale successfully distinguished between patients who sustained community tenure versus those who experienced rapid readmission.
• Concurrent and Convergent Validity: Form R2 performance scores correlate moderately to strongly with clinician-rated scales of functional impairment, such as the Global Assessment of Functioning (GAF; $r = .55$ to $.68$) and the Social and Occupational Functioning Assessment Scale (SOFAS). Conversely, the discrepancy index ($R3 – R2$) correlates positively with measures of family burden and critical expressed emotion.
• Construct and Criterion Validity in Neuropsychological Cohorts: Jackson et al. (1992) validated the KAS for victims of traumatic brain injury and spinal cord injury, identifying that Forms R2 and R3 sensitive track neurocognitive deficits, showing clear dissociations between physical disability and executive/social disinhibition. Vickrey et al. (1992) administered the KAS to epilepsy surgical cohorts, demonstrating that post-operative gains in seizure freedom mapped directly onto significant longitudinal improvements in Form R2 scores ($p < .01$).
• Ecological Validity: Because ratings are completed by a relative or cohabiting partner who observes the individual across naturalistic, non-clinical environments over extended periods, the KAS minimizes the “white-coat effect” and ecological invalidity inherent in brief in-clinic behavioral observations.

Reliability

The reliability of the Katz Adjustment Scale Forms R2 and R3 has been established across clinical and non-clinical samples:

• Internal Consistency: Cronbach’s alpha coefficients for Form R2 typically fall within the $.83$ to $.91$ range, indicating high internal homogeneity among the 16 functional items. Form R3 (Expectations) demonstrates comparable internal reliability, with alpha coefficients regularly exceeding $.85$.
• Test-Retest Stability: In stable, non-interventional outpatient cohorts evaluated over two- to four-week test intervals, Pearson correlation coefficients for Form R2 range from $.72$ to $.86$, indicating that role performance ratings remain consistent in the absence of clinical change or major life events.
• Inter-Informant Reliability: When two independent collaterals (e.g., spouse and adult child, or two parents) complete Form R2 simultaneously, inter-rater reliability coefficients range between $.64$ and $.78$. While inter-rater concordance is lower than intra-informant stability, this variance reflects differing relational contexts, direct exposure levels, and behavioral expectations held by different relatives.

Factor Analysis

Exploratory factor analyses (EFA) and subsequent confirmatory factor analyses (CFA) conducted on the 16 items of Form R2 generally yield a robust three-factor solution explaining between 54% and 62% of the common variance:

Factor 1: Social, Interpersonal, and Leisure Engagement

This factor typically accounts for the largest proportion of common variance (approximately 28–32%). High-loading items include:

• Item 9: Goes to parties and other social activities ($lambda pprox .78$)
• Item 4: Entertains friends at home ($lambda pprox .74$)
• Item 2: Visits his friends ($lambda pprox .71$)
• Item 3: Visits his relatives ($lambda pprox .68$)
• Item 14: Takes up hobbies ($lambda pprox .61$)

Factor 2: Instrumental, Vocational, and Financial Responsibility

Accounts for approximately 14–18% of the variance, capturing adult economic and executive independence:

• Item 15: Works ($lambda pprox .82$)
• Item 16: Supports the family ($lambda pprox .79$)
• Item 6: Helps with the family budgeting ($lambda pprox .69$)
• Item 12: Helps in the care and training of children ($lambda pprox .58$)

Factor 3: Basic Domestic and Self-Care Maintenance

Accounts for approximately 10–14% of the variance, reflecting fundamental functional autonomy:

• Item 5: Dresses and takes care of himself ($lambda pprox .75$)
• Item 1: Helps with household chores ($lambda pprox .70$)
• Item 7: Remembers to do important things on time ($lambda pprox .64$)
• Item 11: Helps with family shopping ($lambda pprox .59$)

Goodness-of-fit evaluations across diverse samples support this three-factor conceptualization (Root Mean Square Error of Approximation [RMSEA] $le .06$; Comparative Fit Index [CFI] $ge .93$).

Instrument / Measurement Tool

• Format: Informant-report (completed by a close relative, spouse, parent, or primary caregiver who resides with or has frequent weekly contact with the subject).
• Item Count: 16 items per form (16 items on Form R2, paired with the identical 16 items on Form R3).
• Response Scale (Form R2 – Level of Performance of Socially Expected Activities):
  • 1 = is not doing
  • 2 = is doing some
  • 3 = is doing regularly
• Response Scale (Form R3 – Level of Expectations for Performance of Social Activities):
  • 1 = did not expect him to be doing
  • 2 = expected him to be doing some
  • 3 = expected him to be doing regularly
• Scoring and Metrics:
  • Form R2 Total Performance Score: Sum of all 16 items (range: 16 to 48). Higher scores reflect greater functional competence and more frequent community role fulfillment.
  • Form R3 Total Expectation Score: Sum of all 16 items (range: 16 to 48). Higher scores reflect greater expectations held by the relative.
  • Discrepancy / Dissatisfaction Score: Computed item-by-item or as an overall total by calculating: $$\text{Discrepancy} = \text{Score}_{R3} – \text{Score}_{R2}$$ Positive discrepancy values represent unmet expectations (informant expected more than what the individual is currently doing), whereas negative or zero values represent expectations that are fully met or exceeded.
• Administration Time: Approximately 5 to 10 minutes for completion of both Forms R2 and R3.

Permissions & Fee and Test Year

The original public domain and empirical foundations of the Katz Adjustment Scale were first published in 1963 by Martin M. Katz and Samuel B. Lyerly in Psychological Reports. As an academic assessment protocol, the 16-item performance and expectation forms (R2 and R3) have been widely cited and reproduced across scholarly, hospital, and clinical research settings for non-commercial psychometric investigation.

In 1998, Western Psychological Services (WPS) released a standardized, commercially published adaptation authored by Martin M. Katz and Warren L. Warren, titled the Katz Adjustment Scales – Relative Report Form (KAS-R). Clinical practitioners, formal diagnostic centers, and commercial trial administrators seeking standardized norm profiles, scoring templates, and formal testing kits should obtain authorized materials and copyright permissions directly through Western Psychological Services or consult the original academic source publications for archival research purposes.

References

• Jackson, H. F., Hopewell, C. A., Glass, C. A., Warburg, R., Dewey, M., & Ghadiali, E. (1992). The Katz Adjustment Scale: Modification for use with victims of traumatic brain and spinal injury. Brain Injury, 6(2), 109–127. https://doi.org/10.3109/02699059209029649
• 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. https://doi.org/10.2466/pr0.1963.13.2.503
• Katz, M. M., & Warren, W. L. (1998). Katz Adjustment Scales Relative Report Form Manual. Western Psychological Services.
• McDowell, I. (2006). Measuring Health: A Guide to Rating Scales and Questionnaires (3rd ed.). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195165678.001.0001
• Vickrey, B. G., Hays, R. D., Brook, R. H., & Rausch, R. (1992). Reliability and validity of the Katz Adjustment Scales in an epilepsy sample. Quality of Life Research, 1(1), 63–72. https://doi.org/10.1007/BF00435436

13. Items of the Scale (Questionnaire)