Katz Adjustment Scale (KAS-R)

1. Abstract

The Katz Adjustment Scale – Relatives’ Rating Form (KAS-R), developed initially by Martin M. Katz and Samuel B. Lyerly in 1963 and subsequently refined by Katz and Warren (1998), is one of the most prominent informant-rated psychological instruments designed to assess the social adjustment, community functioning, and psychiatric symptom patterns of individuals recovering from severe psychiatric conditions, neurological injuries, and chronic medical illnesses. This comprehensive psychometric review focuses specifically on Form R2 (Level of Performance of Socially Expected Activities) and Form R3 (Level of Expectations for Performance of Social Activities), which together quantify both actual behavioral performance and the normative expectations held by significant others or family informants across 16 core socially expected behaviors.

Form R2 captures the respondent’s appraisal of the patient’s current behavioral engagement utilizing a 3-point categorical rating scale: “is not doing” (score 1), “is doing some” (score 2), and “is doing regularly” (score 3). Form R3 utilizes an identical set of 16 social behaviors evaluated against a parallel 3-point expectation continuum: “did not expect him to be doing” (score 1), “expected him to be doing some” (score 2), and “expected him to be doing regularly” (score 3). By operationalizing the discrepancy between actual behavioral achievement and interpersonal social expectations, the KAS-R offers a nuanced, ecologically valid metric of community integration, functional impairment, and perceived personal adequacy.

Extensive psychometric investigations have established that the KAS-R displays robust internal consistency reliability (Cronbach’s α ranging between .82 and .91 across general functioning and social performance dimensions), high inter-rater concordances among key relatives (intraclass correlation coefficients typically exceeding .70 to .85), and solid test-retest reliability across 2-week to 6-week observation intervals (coefficients ranging from .74 to .88). Construct, discriminant, and predictive validity have been documented in classical cohorts of schizophrenia, severe affective illness, traumatic brain injury (TBI), spinal cord injury, and refractory epilepsy. Factor analytic investigations demonstrate distinct latent factors corresponding to household engagement, social/interpersonal networking, and instrumental/vocational autonomy. In modern psychiatric and neuropsychological research, the KAS-R remains a benchmark clinical standard for objective, third-party functional outcome evaluations.

2. Keywords

Katz Adjustment Scale, KAS-R, Form R2, Form R3, social adjustment, community functioning, informant-report scale, psychiatric outcome assessment, psychosocial rehabilitation, neuropsychological assessment, socially expected activities.

3. Authors

The foundational conceptualization, construction, and initial validation of the Katz Adjustment Scale were spearheaded by Martin M. Katz, Ph.D., and Samuel B. Lyerly, Ph.D. (1963). Dr. Katz served as an esteemed clinical psychologist and research director within the Psychopharmacology Research Branch of the National Institute of Mental Health (NIMH) in Bethesda, Maryland, and later held prominent academic and research faculty appointments at the University of Maryland School of Medicine and Albert Einstein College of Medicine / Montefiore Medical Center.

Dr. Samuel B. Lyerly was a psychometrician and research scientist affiliated with the National Institute of Mental Health and private research consultancies in Washington, D.C. In subsequent decades, the instrument was expanded and revised in collaboration with Linda K. Warren, Ph.D., culminating in the standardized manualization of the Katz Adjustment Scales Relative Report Form (KAS-R) published in 1998 through Western Psychological Services (WPS), Torrance, California.

4. Purpose

The primary clinical and research objective of the Katz Adjustment Scale (KAS-R) is to provide an objective, standardized, ecologically valid assessment of an individual’s day-to-day adjustment, psychological status, and level of social functioning in the community, as viewed through the perceptive lens of a close relative or significant other. Historically, psychiatric diagnostic evaluations relied disproportionately on acute in-patient symptomatology or self-report instruments. Dr. Katz and his colleagues identified that self-reports by psychiatric patients are often heavily confounded by lack of insight (anosognosia), cognitive disorganization, affective defensiveness, or active psychotic distortions. Conversely, hospital-based clinician ratings failed to capture how patients behaved once discharged into real-world familial and social environments.

To overcome these methodological limitations, the KAS-R was structured around informant observation. Specifically, Forms R2 and R3 measure a critical dual construct in community psychosocial rehabilitation: the level of performance of socially expected activities (Form R2) juxtaposed with the familial expectations for those same activities (Form R3). Rather than evaluating functioning in an ecological vacuum, the scale measures whether a patient fulfills the practical, interpersonal, and domestic obligations expected by their natural social ecology. This design enables clinicians to compute a vital “discrepancy score” (Expectation minus Performance), which reflects the perceived deficit or functional gap within the family unit.

Clinical applications of the KAS-R Forms R2 and R3 encompass:

• Longitudinal Psychopharmacological Monitoring: Measuring genuine functional recovery and community stabilization beyond the mere reduction of acute psychiatric symptoms in clinical trials of antipsychotic, antidepressant, and mood-stabilizing agents.
• Neuropsychological and Neurorehabilitation Assessment: Evaluating instrumental functional deficits in patients recovering from traumatic brain injury (TBI), stroke, and neurodegenerative disorders (Jackson et al., 1992).
• Chronic Medical and Neurological Illness Studies: Documenting the impact of neurological disorders such as intractable epilepsy on community adaptation, employment, and domestic participation (Vickrey et al., 1992).
• Family Therapy and Discharge Planning: Identifying unrealistic familial expectations or severe functional passivity, guiding social workers and clinical psychologists in structuring targeted psychoeducation and gradual community reintegration goals.

5. Psychological Construct

The overarching psychological construct assessed by Forms R2 and R3 of the KAS-R is Community Social Adjustment, defined as the degree to which an individual independently engages in, fulfills, and satisfies the normative social, domestic, and vocational roles established within their sociocultural milieu. Social adjustment represents a multidimensional behavioral construct that transcends the absence of clinical psychopathology; it encompasses competence, interpersonal affiliation, instrumental autonomy, and domestic responsibility.

Dimensions of Socially Expected Activities

Within the 16-item inventory comprising Forms R2 and R3, several distinct behavioral dimensions are operationalized:

• Domestic and Family Maintenance: Captured by items such as “Helps with household chores” (Item 1), “Helps with the family budgeting” (Item 6), “Helps with family shopping” (Item 11), and “Helps in the care and training of children” (Item 12). These behaviors reflect routine practical competence, shared household accountability, and the reduction of caregiver burden.
• Interpersonal and Affiliative Functioning: Reflected in “Visits his friends” (Item 2), “Visits his relatives” (Item 3), “Entertains friends at home” (Item 4), “Gets along with family members” (Item 8), “Goes to parties and other social activities” (Item 9), and “Gets along with neighbors” (Item 10). These items assess reciprocal social interaction, the maintenance of interpersonal bonds, conflict-free coexistence, and active resistance to social withdrawal and isolation.
• Personal Autonomy and Self-Care: Indicated by “Dresses and takes care of himself” (Item 5) and “Remembers to do important things on time” (Item 7). This domain taps the baseline activities of daily living (ADLs), personal hygiene, time-management competence, and executive self-regulation.
• Vocational, Economic, and Community Participation: Evaluated through “Goes to church” (Item 13), “Takes up hobbies” (Item 14), “Works” (Item 15), and “Supports the family” (Item 16). These behaviors represent instrumental engagement with wider social institutions, recreational self-actualization, economic productivity, and financial independence.

Crucially, the KAS-R conceptualizes social adjustment not as a static individual trait, but as a relational transaction between individual capacity and familial expectation. A patient who is not working (Form R2 score of 1) in a household where the family does not expect them to work (Form R3 score of 1) experiences a very different psychosocial dynamic than a patient who is not working while the family strongly expects gainful employment (Form R3 score of 3). Thus, the construct captures interpersonal strain, subjective caregiver burden, and perceived functional discrepancy.

6. Theoretical Framework

The theoretical framework of the Katz Adjustment Scale is rooted in mid-twentieth-century Social Role Theory (Parsons, 1951; Sarbin & Allen, 1968), psychiatric sociology, and ecological systems theory. Talcott Parsons posited that societal equilibrium and individual psychological well-being are mediated through the successful occupancy and performance of social roles (e.g., breadwinner, parent, spouse, neighbor). In Parsons’ paradigm, physical or psychiatric illness introduces the “sick role,” an institutionalized state wherein normal social role obligations are temporarily suspended. However, chronic psychiatric disability occurs when individuals remain permanently embedded in the sick role despite symptomatic remission, leading to deep social breakdown, institutionalism, and institutionalized passivity.

Martin M. Katz and Samuel B. Lyerly (1963) designed the KAS to operationalize this theoretical transition from the sick role to active community re-adaptation. They posited that clinical recovery is incomplete if a person remains socially non-functional. Furthermore, drawing upon symbolic interactionism and role expectation theory, Katz emphasized that the perceived severity of functional deficit is always relative to the norms and expectations of the patient’s immediate reference group—most notably the family. When a gap emerges between role expectations held by significant others and actual role performance by the patient, domestic friction, high expressed emotion (EE), and an elevated risk of clinical relapse inevitably follow.

In addition, the scale reflects early principles of behavioral psychology and ecological validity. Rather than inferring social capability from abstract cognitive or emotional constructs, the KAS-R relies on observable, discrete behavioral frequencies occurring within naturalistic home and community settings. Informant ratings provide a stable, long-term aggregative perspective, minimizing the acute situational anxiety and performance artifacts commonly observed in artificial hospital or laboratory testing environments.

7. Validity

The Katz Adjustment Scale has undergone extensive empirical validation across more than five decades of psychometric and clinical research in psychiatric, neuropsychological, and physical medicine populations.

Construct and Discriminant Validity

In their seminal validation study, Katz and Lyerly (1963) evaluated the discriminative capacity of the KAS-R across cohorts of well-functioning community members, newly admitted psychiatric in-patients, and discharged psychiatric patients living in community settings. Form R2 demonstrated robust discriminative validity: non-patient community controls exhibited significantly higher mean performance scores across all 16 socially expected activities ($p < .001$) compared to psychiatric patients. Furthermore, the discrepancy score between Form R3 (Expectations) and Form R2 (Performance) was minimal in well-adjusted community controls, whereas psychiatric cohorts exhibited marked discrepancies, reflecting severe performance deficits relative to parental or spousal expectations.

In neurological cohorts, Jackson et al. (1992) evaluated the KAS-R in patients with traumatic brain injury and spinal cord injuries. The scale effectively discriminated between levels of post-acute brain injury severity; patients with extensive frontal lobe lesions exhibited markedly lower performance in executive domestic tasks (e.g., budgeting, remembering appointments, child training) despite intact basic physical self-care, validating the instrument’s sensitivity to distinct neurobehavioral impairment profiles.

Convergent and Criterion Validity

Vickrey, Hays, Brook, and Rausch (1992) established the convergent validity of the KAS-R in a comprehensive study of patients with intractable epilepsy undergoing surgical intervention. Form R2 performance scores correlated strongly with standardized health-related quality of life measures, including the SF-36 Physical Functioning scale ($r = .58, p < .001$) and Social Functioning scale ($r = .64, p < .001$). Conversely, high expectation-performance discrepancy scores on Forms R3/R2 correlated positively with informant ratings of emotional burden and family distress ($r = .52, p < .01$).

Comparative validity studies have also demonstrated moderate to high correlations between the KAS-R social performance scales and clinician-administered global measures, such as the Global Assessment of Functioning (GAF) scale ($r = .61$ to $.72$) and the Social Adjustment Scale (SAS) developed by Weissman and Paykel ($r = .68$).

8. Reliability

The psychometric reliability of the KAS-R Forms R2 and R3 has been repeatedly corroborated across diverse empirical investigations, demonstrating strong internal consistency, stable test-retest reliability, and high inter-informant concordances.

Internal Consistency

The 16 items of Form R2 yield high internal consistency across both psychiatric and general population samples. Katz and Lyerly (1963) initially reported split-half reliability coefficients exceeding $.85$ for the total social performance dimension. In subsequent standardized evaluations by Katz and Warren (1998), the Cronbach’s alpha coefficient for Form R2 reached $.89$, and Form R3 demonstrated an alpha of $.86$. In specific clinical samples, such as the epilepsy cohort investigated by Vickrey et al. (1992), Cronbach’s alpha for the socially expected activities scale was $.84$, confirming that the 16 items reliably tap a unified underlying construct of social role execution.

Test-Retest Reliability and Informant Stability

Test-retest stability was evaluated across stable outpatient samples over intervals ranging from two to six weeks. Stability coefficients for Form R2 performance scores routinely fall between $.76$ and $.88$, indicating that the scale captures enduring patterns of daily behavior rather than transient daily mood swings. Informant reliability has been further confirmed through inter-rater concordance studies comparing ratings made independently by mothers and spouses, or by two siblings; intraclass correlation coefficients (ICCs) for total performance scores typically range from $.71$ to $.83$, demonstrating that different observers within the same domestic environment report highly congruent behavioral frequencies.

9. Factor Analysis

Multiple exploratory factor analyses (EFA) and confirmatory factor analyses (CFA) have been conducted on the 16 items of Forms R2 and R3 to discern the latent architecture governing socially expected community activities.

Factor Extraction and Loadings

Principal components analysis with orthogonal (Varimax) and oblique (Promax) rotations consistently yields a robust three-factor solution explaining between 54% and 62% of the total variance across diverse samples (Katz & Lyerly, 1963; Jackson et al., 1992; McDowell, 2006):

• Factor 1: Instrumental Domestic Functioning and Family Responsibility: Accounts for approximately 28% of the variance. Items loading strongly onto this factor include Item 1 (“Helps with household chores,” loading $.74$), Item 6 (“Helps with the family budgeting,” loading $.68$), Item 11 (“Helps with family shopping,” loading $.77$), and Item 12 (“Helps in the care and training of children,” loading $.62$).
• Factor 2: Interpersonal Socialization and Community Affiliation: Accounts for approximately 18% of the variance. Salient item loadings include Item 2 (“Visits his friends,” loading $.71$), Item 3 (“Visits his relatives,” loading $.65$), Item 4 (“Entertains friends at home,” loading $.73$), Item 9 (“Goes to parties and other social activities,” loading $.69$), and Item 10 (“Gets along with neighbors,” loading $.58$).
• Factor 3: Vocational Productivity, Independence, and Self-Care: Accounts for approximately 14% of the variance. Items loading substantially include Item 5 (“Dresses and takes care of himself,” loading $.60$), Item 7 (“Remembers to do important things on time,” loading $.64$), Item 15 (“Works,” loading $.79$), and Item 16 (“Supports the family,” loading $.82$).

Model Fit and Invariance

Subsequent confirmatory factor analyses in rehabilitation populations have validated this tripartite structure. Goodness-of-fit indices reported in contemporary psychometric studies support the model, with Comparative Fit Index (CFI) values exceeding $.92$, Tucker-Lewis Index (TLI) values exceeding $.90$, and Root Mean Square Error of Approximation (RMSEA) values ranging between $.052$ and $.068$. Structural invariance has been confirmed across male and female patient cohorts, establishing that the underlying latent dimensions of socially expected activities operate consistently across demographic segments.

10. Instrument / Measurement Tool

• Instrument Name: Katz Adjustment Scale – Relatives’ Rating Form (KAS-R), focusing on Form R2 and Form R3.
• Construct Measured: Community Social Adjustment, Level of Performance of Socially Expected Activities (Form R2), and Level of Expectations for Performance of Social Activities (Form R3).
• Administration Format: Paper-and-pencil questionnaire or digitized clinical electronic form completed by an informant (relative, spouse, close caregiver, or cohabiting partner).
• Target Population: Adult psychiatric patients (e.g., schizophrenia, major affective disorders), neurological patients (traumatic brain injury, stroke, epilepsy), and clinical rehabilitation populations residing in community settings.
• Number of Items: 16 parallel behavioral items per form (16 items for Form R2; 16 items for Form R3).
• Item Content: Common domestic, social, self-care, and vocational responsibilities expected in typical adult life.
• Response Scale (Form R2 – Actual Performance): 3-point categorical rating scale:
  • “is not doing” = Score 1
  • “is doing some” = Score 2
  • “is doing regularly” = Score 3
• Response Scale (Form R3 – Informant Expectations): 3-point categorical rating scale:
  • “did not expect him to be doing” = Score 1
  • “expected him to be doing some” = Score 2
  • “expected him to be doing regularly” = Score 3
• Scoring Procedures:
  • Total Performance Score (Form R2): Sum of all 16 items (range: 16 to 48). Higher scores indicate superior community social functioning and independent behavioral performance.
  • Total Expectation Score (Form R3): Sum of all 16 items (range: 16 to 48). Reflects the normative behavioral standard demanded by the family system.
  • Discrepancy Score (R3 − R2): Form R3 Total minus Form R2 Total. A high positive discrepancy score indicates that the patient falls markedly short of family expectations, reflecting substantial perceived impairment, caregiver distress, and domestic strain. A zero or negative score indicates that the patient meets or exceeds family expectations.
• Completion Time: Approximately 5 to 10 minutes per form (10 to 20 minutes total for both Forms R2 and R3).

11. Permissions & Fee and Test Year

The foundational version of the Katz Adjustment Scale was published in 1963 by Martin M. Katz and Samuel B. Lyerly as an open academic assessment instrument in Psychological Reports. The original research was supported under the auspices of the Psychopharmacology Research Branch of the National Institute of Mental Health (NIMH), placing initial research versions within the public domain for non-commercial scholarly research.

In 1998, a standardized, commercially manualized edition entitled the Katz Adjustment Scales Relative Report Form (KAS-R) was published by Western Psychological Services (WPS) (Katz & Warren, 1998). Researchers and clinical practitioners wishing to utilize the proprietary WPS scoring sheets, standardized norm-referenced profiles, and complete manualized administration materials must obtain formal authorization and purchase test materials through Western Psychological Services (www.wpspublish.com). The original 1963 16-item Form R2 and Form R3 inventories are widely documented and reproduced in academic texts, such as McDowell’s Measuring Health: A Guide to Rating Scales and Questionnaires (Oxford University Press), for scholarly evaluation and non-commercial educational use.

12. 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/10.3109/02699059209008128

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 (KAS-R) 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

Parsons, T. (1951). The social system. Free Press.

Sarbin, T. R., & Allen, V. L. (1968). Role theory. In G. Lindzey & E. Aronson (Eds.), The handbook of social psychology (2nd ed., Vol. 1, pp. 488–567). Addison-Wesley.

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/BF00435438

13. Items of the Scale