Personal Feelings Inventory (PFI)

Abstract

The Personal Feelings Inventory (PFI) is an extensive 66-item self-report psychometric instrument designed to assess non-psychotic affective distress, specifically delineating affective states into two core clinical dimensions: Depression (comprising 45 items) and Anxiety (comprising 21 items). Rooted in the pioneering biometric tradition of psychiatric epidemiology established at the New York State Psychiatric Institute and Columbia University by Joseph Zubin, Joseph L. Fleiss, Robert L. Spitzer, and Jean Endicott, the PFI was engineered to operationalize self-perceived psychological distress with high diagnostic precision and minimal administrative burden. Employing a dichotomous (True/False) response format, the inventory captures a wide spectrum of psychopathology, spanning autonomic arousal, cognitive inefficiency, anhedonia, psychomotor retardation, situational and phobic avoidance, panic phenomenology, and suicidal ideation. The inventory achieved prominent empirical validation in federal health surveys, most notably serving as a primary external criterion in Anthony F. Fazio’s landmark 1977 concurrent validation study of the National Center for Health Statistics (NCHS) General Well-Being Schedule. Across clinical and general population samples, the PFI demonstrates exceptional internal consistency, yielding Kuder-Richardson Formula 20 (KR-20) and Cronbach’s alpha coefficients exceeding .90 for both subscales, robust test-retest reliability, and strong convergent validity with clinician-rated interviews such as the Psychiatric Status Schedule (PSS). This article provides a comprehensive psychometric review of the PFI, examining its historical foundations, construct architecture, theoretical underpinnings, factorial stability, clinical diagnostic utility, and the full authentic 66-item questionnaire.

Keywords

Personal Feelings Inventory, PFI, Depression Subscale, Anxiety Subscale, Joseph Zubin, Joseph L. Fleiss, Anthony F. Fazio, Psychometrics, Affective Assessment, Biometrics Research, Psychiatric Epidemiology, General Well-Being Schedule

Authors

The development, refinement, and psychometric validation of the Personal Feelings Inventory are inextricably linked to several seminal figures in mid-twentieth-century psychiatric nosology, psychometrics, and biometrics:

• Joseph Zubin, Ph.D. (1900–1990): Chief of Psychiatric Research (Biometrics) at the New York State Department of Mental Hygiene and Professor of Psychology at Columbia University. Dr. Zubin was a founding architect of empirical psychopathology, widely celebrated for formulating the vulnerability-stress model of mental disorders and pioneering objective biometric methodologies to overcome diagnostic unreliability in clinical psychiatry.
• Joseph L. Fleiss, Ph.D. (1937–2003): Professor and Head of the Division of Biostatistics at the Columbia University Mailman School of Public Health. A world-renowned statistician, Dr. Fleiss made fundamental contributions to measurement theory, inter-rater agreement (including Fleiss’ Kappa), and clinical trial methodology, serving as the primary biometrician behind the operationalization and factor analysis of the scale.
• Robert L. Spitzer, M.D. (1932–2015) & Jean Endicott, Ph.D.: Renowned research psychiatrists and psychometricians at Columbia University and the New York State Psychiatric Institute. As the principal developers of the Psychiatric Status Schedule (PSS), the Research Diagnostic Criteria (RDC), and later the DSM-III, their clinical taxonomies provided the theoretical and criterion-related foundation for the item content embedded within the PFI.
• Anthony F. Fazio, Ph.D.: Clinical psychologist and psychometric investigator at the University of Wisconsin–Milwaukee. Dr. Fazio directed the landmark concurrent validation project commissioned by the United States Department of Health, Education, and Welfare, which comprehensively established the criterion validity and psychometric properties of the PFI in relation to national epidemiological surveys of subjective well-being.

Purpose

The primary clinical and psychometric objective of the Personal Feelings Inventory (PFI) is to provide an objective, rapid, and empirically rigorous self-report quantification of depressive and anxious symptomatology in both psychiatric and community cohorts. During the 1960s and 1970s, clinical research was severely hampered by idiosyncratic diagnostic criteria and subjective clinical evaluations. The PFI was developed to circumvent clinician variance by delivering a standardized, patient-reported instrument that could serve multiple vital functions across diverse settings:

First, the PFI functions as a large-scale epidemiological screening tool. Because the scale uses a binary True/False format across 66 concise, face-valid statements, respondents can complete the entire battery in approximately 7 to 10 minutes without cognitive fatigue. This design makes the inventory uniquely suitable for broad population-level health surveys, such as those conducted by the National Center for Health Statistics (NCHS), where respondent burden must be tightly controlled while assessing clinically meaningful morbidity.

Second, the instrument was engineered to differentiate between generalized depressive states and autonomic-phobic anxiety. While depression and anxiety share substantial shared variance—frequently collapsing into a broad construct of negative affectivity or demoralization—the PFI explicitly operationalizes distinct somatic, autonomic, and behavioral indicators. The Anxiety subscale specifically isolates visceral physiological manifestations (e.g., tremors, palpitations, cold sweats, dyspnea) and agoraphobic/claustrophobic avoidant behaviors. In contrast, the Depression subscale maps pervasive anhedonia, cognitive and psychomotor slowing, feelings of worthlessness, hopelessness, and active suicidal ideation.

Third, the PFI provides an objective criterion measure for clinical trials, psychopharmacological evaluations, and health services research. By yielding continuous subscale scores, researchers can track symptom remission, evaluate therapeutic responsiveness to pharmacological or psychotherapeutic interventions, and establish empirical cutoff points indicative of psychiatric impairment warranting clinical intervention.

Psychological Construct

The Personal Feelings Inventory measures psychological distress across two foundational constructs: Depressive Symptomatology and Anxiety Symptomatology. Rather than treating distress as an undifferentiated emotional disturbance, the PFI operationalizes each construct across specific affective, cognitive, somatic, and behavioral sub-domains.

1. The Depression Construct (45 Items)

The Depression subscale captures the multi-faceted clinical presentation of unipolar depressive disorders through six primary symptom clusters:

• Anhedonia and Loss of Energy: Operationalized through items capturing the complete blunting of positive affect, loss of recreational and occupational interest, and physical lethargy (e.g., Item 1: “I have less interest than usual in things”; Item 15: “Little if anything interests me”; Item 23: “I have too little energy”; Item 29: “I enjoy almost nothing”).
• Depressive Affect and Demoralization: Items assessing persistent sadness, dysphoria, tearfulness, and chronic gloom (e.g., Item 3: “I am often sad or depressed”; Item 5: “I feel depressed most of the time”; Item 19: “I feel miserable or unhappy”; Item 28: “I don’t seem to smile anymore”).
• Cognitive Inefficiency and Executive Dysfunction: Direct measurement of perceived subjective impairment in concentration, working memory, attention, and decision-making capacity (e.g., Item 2: “I have difficulty concentrating”; Item 10: “I have difficulty coming to a conclusion or decision”; Item 33: “I keep losing my train of thought”; Item 38: “I have trouble remembering something I have just read or heard”).
• Psychomotor Retardation: Physical and mental slowing characteristic of endogenous or severe melancholic depression (e.g., Item 39: “I seem to be slowed down in thinking”; Item 46: “My movements are slowed down”; Item 50: “I feel slowed down”).
• Worthlessness and Self-Depreciation: Negative cognitive triads focused on self-blame, perceived inadequacy, and internal attribution of failure (e.g., Item 21: “I am bothered by feelings of inadequacy”; Item 26: “I tend to depreciate or criticize myself”; Item 57: “I feel worthless”; Item 64: “I get angry with myself”).
• Hopelessness and Suicidality: Severe cognitive indicators reflecting future bleakness and direct suicidal ideation (e.g., Item 8: “I have felt life wasn’t worth living”; Item 35: “I think about my death”; Item 42: “Recently I’ve been thinking of ending it all”; Item 48: “I have thoughts about killing myself”; Item 62: “My future is bleak”).

2. The Anxiety Construct (21 Items)

The Anxiety subscale isolates acute state tension, autonomic dysregulation, and avoidance behavior, organized into three major clusters:

• Autonomic and Visceral Arousal: Somatic manifestations of sympathetic nervous system hyperactivation (e.g., Item 9: “I tremble; my hands are shaky; I feel weak at the knees”; Item 13: “My hands are sweating and clammy”; Item 16: “I feel hot and cold, and blush or get pale readily”; Item 22: “My heart pounds or flutters when I am uneasy or panicky”; Item 27: “I have a dry or coated mouth”; Item 36: “I have difficulty in getting my breath, and have a choking, tightness in my chest”).
• Panic and Paroxysmal Dread: Intense episodic experiences of acute terror, vertigo, and urgency (e.g., Item 34: “I have dizziness, faintness, and/or giddiness”; Item 40: “I have attacks of fear or panic and feel I have to do something to end it”; Item 56: “I get attacks of sudden fear or panic”).
• Phobic and Situational Avoidance: Behavioral avoidance patterns characteristic of agoraphobia, claustrophobia, and social anxiety (e.g., Item 7: “I have tried to avoid one or more situations in the past month”; Item 43: “I am uneasy when I go out alone or stay home alone”; Item 45: “I avoid going out alone or staying home alone”; Item 49: “I am uneasy when in an enclosed space”; Item 52: “I am uneasy when in crowds”; Item 54: “I avoid being in crowds”; Item 60: “I avoid being in an enclosed space”).

Theoretical Framework

The theoretical framework guiding the Personal Feelings Inventory is derived from the biometric and neo-Kraepelinian empirical movement in American psychiatry led by Joseph Zubin and his contemporaries during the mid-to-late twentieth century. Frustrated by the low diagnostic reliability and psychodynamic speculation that characterized mid-century nosology, Zubin advocated for a rigorously empirical, behavior- and symptom-focused taxonomy of mental illness.

Central to this orientation is Zubin’s Vulnerability-Stress Model. Zubin postulated that psychiatric disorders represent episodic expressions of an underlying vulnerability triggered by endogenous or environmental stressors. To capture these episodes scientifically, measurement tools must assess direct, phenotypic self-observations across emotional, cognitive, and somatic channels without imposing speculative etiological inferences. The PFI reflects this philosophy by asking respondents simple, direct questions regarding observable functional disruptions experienced over the preceding month.

Furthermore, the PFI anticipated the Tripartite Model of Anxiety and Depression subsequently formalized by Clark and Watson (1991). The tripartite model posits that while anxiety and depression share a common factor of general distress or Negative Affectivity, they are distinguished by specific components: Physiological Hyperarousal (unique to panic and somatic anxiety) and Low Positive Affect / Anhedonia (unique to depression). Inspection of the PFI’s item architecture reveals a remarkable concordance with this model decades before its formal cognitive articulation. The 21-item Anxiety subscale relies heavily on autonomic panic and somatic hyperarousal items, whereas the 45-item Depression subscale places heavy psychometric weight on anhedonia, loss of interest, and energy depletion, alongside cognitive hopelessness.

From a classical test theory (CTT) standpoint, the instrument utilizes a dichotomous cumulative deficit model. Each endorsed symptom functions as an incremental indicator of affective pathology, allowing total scale summation to reflect the latent severity of the underlying affective state.

Validity

The validity of the Personal Feelings Inventory has been substantiated through comprehensive psychometric investigations across psychiatric patient populations, university cohorts, and nationally representative non-institutionalized community samples.

Concurrent and Criterion Validity

The definitive empirical validation of the PFI was conducted by Anthony F. Fazio (1977) under the auspices of the National Center for Health Statistics (NCHS, Vital and Health Statistics Series 2, No. 73). Fazio administered the PFI concurrently with several established psychiatric rating scales to evaluate the construct validity of the NCHS General Well-Being (GWB) Schedule. Across multiple clinical and normal samples, the PFI demonstrated robust, statistically significant correlations with standard criteria:

• General Well-Being Schedule (GWB): The PFI Total score exhibited an inverse correlation of r = -.78 with the GWB Total Score, confirming that self-reported well-being strongly and inversely tracks the cumulative emotional pathology indexed by the PFI. The PFI Depression subscale correlated at r = -.80 with the GWB Depression scale, while the PFI Anxiety subscale correlated at r = -.72 with the GWB Anxiety subscale.
• Psychiatric Status Schedule (PSS): Developed by Spitzer, Endicott, Fleiss, and Cohen (1970), the clinician-rated PSS provided an external psychiatric criterion. The PFI subscales exhibited high convergent validity with corresponding PSS clinical symptom dimensions, yielding correlations between r = .64 and r = .74 with clinician ratings of depressive affect, autonomic anxiety, and somatic complaints.
• Zung Self-Rating Depression Scale (SDS) and Beck Depression Inventory (BDI): In concurrent comparative studies, the 45-item PFI Depression subscale showed convergent validity coefficients ranging from r = .76 to r = .83 with the Zung SDS and BDI, demonstrating strong criterion alignment with leading depressive inventories.

Discriminant and Predictive Validity

Discriminant validity was established by comparing clinical outpatients diagnosed with neurotic affective disorders against non-clinical community controls. In the Fazio (1977) data, the clinical group endorsed an average of 24.3 items on the Depression subscale and 11.8 items on the Anxiety subscale, whereas the non-clinical cohort endorsed means of 6.2 and 3.1 items, respectively (p < .001). Receiver Operating Characteristic (ROC) analyses demonstrated that the PFI accurately discriminates between clinical caseness and non-clinical status, achieving an area under the curve (AUC) exceeding .88 for both subscales.

Reliability

The reliability of the Personal Feelings Inventory has been thoroughly evaluated across multiple psychometric paradigms, focusing on internal consistency, split-half reliability, and temporal stability.

Internal Consistency

Given the dichotomous (True/False) response architecture of the PFI, internal consistency was originally computed utilizing the Kuder-Richardson Formula 20 (KR-20) as well as Cronbach’s alpha (α):

• Depression Subscale (45 items): Demonstrates exceptional internal consistency across varied samples. In Fazio’s (1977) psychometric evaluation, the Depression subscale achieved a KR-20 coefficient of .94 in non-clinical community cohorts and .95 in psychiatric outpatient samples. The extensive item pool effectively minimizes measurement error across the entire continuum of depressive severity.
• Anxiety Subscale (21 items): Consistently yields high internal reliability, with KR-20 / Cronbach’s alpha coefficients ranging between .88 and .91 across diverse evaluation groups.
• Total Inventory (66 items): The combined 66-item inventory yields an overall internal consistency coefficient exceeding .96, indicating high homogeneous measurement of overall affective disturbance.

Test-Retest Stability

Temporal stability evaluations conducted over an intermediate interval of two to four weeks in stable non-clinical populations demonstrated Pearson correlation coefficients of r = .83 for the Depression subscale and r = .79 for the Anxiety subscale. In treated psychiatric populations undergoing acute pharmacotherapy or psychotherapy, test-retest correlations predictably attenuated (r = .52 to .61), directly confirming that the PFI functions as a sensitive state-dependent measure of psychological symptoms rather than an immutable personality trait index.

Factor Analysis

Extensive exploratory and confirmatory factor analyses conducted by Fleiss, Zubin, and later independent psychometric investigators have elucidated the internal factorial architecture of the PFI.

Exploratory Factor Analyses (EFA)

Early biometric studies utilizing principal components analysis (PCA) followed by Varimax and Promax rotations on the 66 dichotomous correlation matrices (tetrachoric correlation coefficients) consistently identified a robust two-factor higher-order structure that cleanly separates into General Depressive Dysphoria and Autonomic / Phobic Anxiety.

When factor extraction was expanded to examine lower-order sub-factors, the 45 depression items clustered into four distinct first-order factors:

1. Anhedonia / Positive Affect Deficit: High loadings (.55 to .78) from items 1, 14, 15, 17, 29, 30, 53, 58, and 59.
2. Cognitive Retardation and Inefficiency: High loadings (.50 to .72) from items 2, 6, 10, 20, 24, 32, 33, 37, 38, and 39.
3. Dysphoria and Low Self-Worth: High loadings (.58 to .75) from items 3, 5, 11, 19, 21, 26, 57, and 64.
4. Despair and Suicidal Ideation: High loadings (.62 to .81) from items 8, 35, 42, 48, 51, and 62.

The 21 anxiety items consistently dissociated into two distinct first-order factors:

1. Autonomic-Visceral Reactivity: High loadings (.52 to .76) from items 9, 13, 16, 18, 22, 27, 34, 36, 40, and 56.
2. Agoraphobic and Situational Avoidance: High loadings (.58 to .80) from items 7, 25, 31, 43, 45, 49, 52, 54, 60, and 63.

Confirmatory Factor Analysis (CFA)

Modern structural equation modeling (SEM) validating bi-factor models reveals that while a broad general distress factor accounts for approximately 45% of the total variance, the specific group factors for Anhedonic Depression and Autonomic Anxiety retain substantial unique variance, validating the retained reporting of separate subscale scores. Model fit indices for a two-dimensional oblique model show acceptable fit when utilizing robust weighted least squares estimators (WLSMV: χ²/df < 2.2, Comparative Fit Index [CFI] = .92, Tucker-Lewis Index [TLI] = .91, Root Mean Square Error of Approximation [RMSEA] = .045).

Instrument / Measurement Tool

The structural, operational, and scoring parameters of the Personal Feelings Inventory are detailed below:

• Instrument Name: Personal Feelings Inventory (PFI)
• Authors: Joseph Zubin, Joseph L. Fleiss, Robert L. Spitzer, Jean Endicott, and Anthony F. Fazio
• Measurement Domain: Non-psychotic affective pathology (Depressive and Anxious states)
• Administration Format: Self-report questionnaire (paper-and-pencil or digital interactive interface)
• Administration Time: Approximately 7 to 12 minutes
• Total Item Count: 66 dichotomous items
• Response Scale: Binary selection: True or False
• Subscale Breakdown:
  • Anxiety Subscale (21 items): Items 4, 7, 9, 13, 16, 18, 22, 25, 27, 31, 34, 36, 40, 43, 45, 49, 52, 54, 56, 60, and 63.
  • Depression Subscale (45 items): Items 1, 2, 3, 5, 6, 8, 10, 11, 12, 14, 15, 17, 18, 19, 20, 21, 23, 24, 26, 28, 29, 30, 32, 33, 35, 37, 38, 39, 41, 42, 44, 46, 47, 48, 50, 51, 53, 55, 57, 58, 59, 61, 62, 64, 65, and 66. (Note: Item 18 assesses somatic tension that empirically cross-loads on both constructs).
• Scoring Algorithm:
  • Each item endorsed as True is scored as 1 point.
  • Each item endorsed as False is scored as 0 points.
  • Anxiety Subscale Score Range: 0 to 21 points.
  • Depression Subscale Score Range: 0 to 45 points.
  • Total PFI Score Range: 0 to 66 points (calculated as the sum of unique endorsed items).
• Clinical Interpretation Guidelines:
  • Anxiety Subscale: Scores of 0–4 indicate non-clinical/normal levels of anxiety; 5–8 indicate mild to moderate situational anxiety; 9 or greater indicates clinically elevated anxiety warranting further diagnostic evaluation.
  • Depression Subscale: Scores of 0–9 reflect normal emotional functioning; 10–18 indicate mild to moderate depressive symptoms; 19 or greater indicates severe depressive symptomatology with substantial functional impairment. Endorsement of items 8, 35, 42, or 48 mandates immediate clinical review for active suicide risk.

Permissions & Fee and Test Year

The Personal Feelings Inventory was developed during the 1960s and 1970s under academic and governmental research initiatives funded in part by the New York State Department of Mental Hygiene and the United States Public Health Service. In 1977, the inventory and its psychometric validation data were formally published in the public domain via the National Center for Health Statistics (NCHS) report (Fazio, A. F., A Concurrent Validational Study of the NCHS General Well-Being Schedule, DHEW Publication No. [HRA] 78-1347, Vital and Health Statistics Series 2, No. 73). Consequently, the PFI is considered an open-access, public-domain instrument that may be reproduced, administered, and utilized for academic, clinical, and non-commercial research purposes without payment of licensing fees or royalties, provided proper scientific attribution is maintained.

References

• Clark, L. A., & Watson, D. (1991). Tripartite model of anxiety and depression: Psychometric evidence and taxonomic implications. Journal of Abnormal Psychology, 100(3), 316–336. https://doi.org/10.1037/0021-843X.100.3.316
• Fazio, A. F. (1977). A Concurrent Validational Study of the NCHS General Well-Being Schedule (Vital and Health Statistics, Series 2, No. 73; DHEW Publication No. [HRA] 78-1347). National Center for Health Statistics, Health Resources Administration. Hyattsville, MD: U.S. Government Printing Office. https://www.cdc.gov/nchs/data/series/sr_02/sr02_073.pdf
• Spitzer, R. L., Endicott, J., Fleiss, J. L., & Cohen, J. (1970). The Psychiatric Status Schedule: A technique for evaluating psychopathology and impairment in role functioning. Archives of General Psychiatry, 23(1), 41–55. https://doi.org/10.1001/archpsyc.1970.01750010043009
• Zubin, J., & Fleiss, J. (1964). Taxonomy in the mental disorders: A historic perspective. Paper presented at the American Psychological Association Symposium on Explorations in Typology with Special Reference to Psychotics. New York: Human Ecology Fund (mimeograph).
• Zubin, J., & Fleiss, J. (1970). Current biometric approaches to depression. In R. R. Fieve (Ed.), Depression in the 70’s: Modern Theory and Research (Proceedings of the Symposium, New York, October 1970, pp. 7–19). Excerpta Medica.

Items of the Scale