Derogatis Sexual Functioning Inventory

Abstract

The Derogatis Sexual Functioning Inventory (DSFI) is an omnibus, multidimensional self-report psychological instrument formulated by Leonard R. Derogatis to evaluate the multifaceted nature of human psychosexual functioning. Conceptualized in the mid-1970s and continually refined through clinical psychometric investigations, the DSFI addresses the critical psychometric limitation of reducing sexual health to mere behavioral tallies of coital frequency or orgasmic attainment. The inventory comprises 254 items organized systematically into 10 substantive clinical subtests: Information, Experiences, Drive, Attitudes, Psychological Symptoms, Affects, Gender Role Definition, Fantasy, Body Image, and Sexual Satisfaction. Crucially, the Psychological Symptoms subtest incorporates the complete 53-item Brief Symptom Inventory (BSI), while the Affects subtest integrates the 40-item Derogatis Affects Balance Scale (DABS), thereby providing an exhaustive assessment of both primary psychosexual parameters and global psychiatric distress.

The instrument yields two primary summary metrics: the Sexual Functioning Index (SFI), an actuarial total score derived from the summation of normalized area standard T-scores (mean = 50, standard deviation = 10) across all 10 clinical dimensions, and the Global Sexual Satisfaction Index (GSSI), a single-item, 9-point anchored subjective rating continuum. Psychometric evaluations across diverse clinical and non-clinical cohorts demonstrate robust internal consistency across subtests (Cronbach’s alpha coefficients ranging from .60 to .97) and high test-retest reliability over a 14-day interval (coefficients typically falling between .77 and .92). Construct and criterion-related validity have been verified across dozens of clinical trials and comparative studies, including discriminating organic from psychogenic erectile disorders, evaluating oncological and endocrine disruptions to sexual health, and tracking pharmacological interventions. The DSFI remains a benchmark clinical and research battery for comprehensive psychosexual profiling.

Keywords

Derogatis Sexual Functioning Inventory, DSFI, sexual dysfunction assessment, psychometrics, Brief Symptom Inventory, Derogatis Affects Balance Scale, Sexual Functioning Index, psychosexual evaluation, multidimensional sex inventory, sexual satisfaction

Authors

The Derogatis Sexual Functioning Inventory was developed by Leonard R. Derogatis, Ph.D.

• Institutional Affiliations: Clinical Psychometric Research, Inc.; Johns Hopkins University School of Medicine (Department of Psychiatry and Behavioral Sciences); Center for Sexual Medicine at Sheppard Pratt Health System, Baltimore, Maryland, United States.
• Scholarly Contributions: Renowned for pioneering validated psychometric instruments in psychiatric epidemiology, oncology quality of life, and clinical sexology, including the Symptom Checklist-90-Revised (SCL-90-R), the Brief Symptom Inventory (BSI), the Derogatis Affects Balance Scale (DABS), and the Derogatis Interview for Sexual Functioning (DISF/DISF-SR).
• Contact Information: Clinical Psychometric Research, Inc., Sheppard Pratt Health System, Baltimore, MD 21285. Inquiries regarding scale distribution and formal testing manuals are handled via official psychometric channels.

Purpose

The fundamental clinical and scientific rationale behind the development of the Derogatis Sexual Functioning Inventory is rooted in the recognition that human sexual behavior is a complex, multidetermined biopsychosocial phenomenon. Historically, sexological evaluation suffered from an overreliance on reductionist outcome measures, such as the sheer frequency of penile-vaginal intercourse, latency to ejaculation, or binary determinations of orgasmic presence versus absence. Such metrics fail to capture the critical psychological, cognitive, affective, and relational mediators that govern an individual’s subjective experience of sexual health or distress. The DSFI was engineered specifically to transcend these mechanical paradigms by quantifying the principal components of sexual functioning within a standardized, comparative psychometric framework.

Clinically, the DSFI serves several vital functions:

• Diagnostic Profiling and Differential Diagnosis: The instrument constructs an individualized psychosexual profile that contrasts an individual’s scores across 10 distinct domains against established normative populations. This multidimensional profiling enables clinicians to delineate the primary etiology of a sexual complaint, distinguishing between primary physiological deficits, secondary affective interference, pervasive neurotic psychopathology, internalized restrictive attitudes, or cognitive misinformation. A quintessential clinical application is the differential diagnosis of organic versus psychogenic erectile dysfunction, where psychological distress, negative affective balance, and high body image anxiety often cluster distinctly from primary vascular or neurological impairment.
• Treatment Planning and Modality Selection: By identifying which specific spheres of functioning are compromised, the DSFI enables clinicians to tailor interventions to individual patient needs. For instance, an individual exhibiting marked sexual dysfunction driven predominantly by deficits in the Information subtest and elevated conservative Attitudes may benefit primarily from psychoeducational sex therapy and cognitive restructuring. Conversely, marked elevations on the Psychological Symptoms (BSI) or Affects (DABS) subscales signal the need for concurrent psychiatric intervention, pharmacotherapy, or intensive individual psychotherapy.
• Surgical and Medical Outcome Monitoring: The DSFI has served as a primary outcome battery in longitudinal clinical investigations assessing the efficacy of surgical interventions (e.g., comparing inflatable versus semi-rigid penile prostheses, gender-affirming reconstructive surgeries, or pelvic floor repairs) and medical therapies (e.g., hormone replacement therapy, sildenafil administration, or psychotropic medications associated with treatment-emergent sexual dysfunction).
• Comprehensive Empirical Research: In scientific research, the DSFI provides a standardized operationalization of sexual health across medical cohorts, including individuals with diabetes mellitus, chronic renal failure, cardiovascular disease, gynecological malignancies, and clinical depression. Its ability to quantify both psychosexual mechanics and psychological well-being allows investigators to untangle the physiological sequelae of systemic disease from its emotional and relational impacts.

Psychological Construct

The Derogatis Sexual Functioning Inventory assesses “current sexual functioning,” operationalized as an interactive matrix of cognitive, behavioral, libidinal, emotional, and social factors. The inventory rejects the premise that sexual functioning can be understood as an isolated biological drive; instead, it posits that sexual health represents an emergent property of total personality integration and emotional homeostasis. The instrument measures 10 substantive primary dimensions, supplemented by two overarching global metrics:

1. Information (26 Items)

This subtest evaluates the respondent’s objective knowledge base regarding human sexual anatomy, reproductive physiology, coital mechanics, and common sexual myths. Constructed in a True/False format, it assesses cognitive misattributions or deficits in sexual literacy that frequently underlie sexual performance anxiety, dyspareunia, or psychogenic inhibition. An objective sum of correct responses forms the subtest score.

2. Experiences (24 Items)

The Experiences dimension maps the behavioral repertoire of the respondent across a developmental spectrum of 24 distinct sexual behaviors, ranging from foundational exploratory activities (e.g., hugging, manual stimulation, open-mouth kissing) to sophisticated coital postures, oral-genital contact, and anal intercourse. The respondent reports both lifetime occurrence and behavioral frequency within the preceding 60 days, yielding an empirical metric of behavioral range and sexual variety.

3. Drive (5 Behavioral Domains)

Libidinal energy and appetitive motivation are measured across five explicit behavioral modalities: frequency of sexual intercourse, solitary masturbation, affectionate kissing and petting, erotic daydreaming/fantasy, and the subjective “ideal” frequency of intercourse desired by the respondent. Rather than viewing drive as an abstract instinct, this subscale captures concrete behavioral expenditures of libido over the immediate assessment interval.

4. Attitudes (30 Items)

This dimension operationalizes the socio-cognitive and moral schemas governing sexual conduct. Composed of 15 liberal items and 15 conservative items rated on 5-point Likert scales, the subtest evaluates values surrounding premarital sex, autoeroticism, non-traditional sexual arrangements, and gender equality in sexual initiation. It produces separate Liberal, Conservative, and Total Attitude scores, identifying cognitive rigidity or normative conflict.

5. Psychological Symptoms (53 Items)

Psychological distress is operationalized directly via the Brief Symptom Inventory (BSI), measuring nine primary symptom dimensions: Somatization, Obsessive-Compulsive, Interpersonal Sensitivity, Depression, Anxiety, Hostility, Phobic Anxiety, Paranoid Ideation, and Psychoticism. This dimension ensures that co-occurring psychiatric distress and generalized neuroticism are systematically accounted for within the psychosexual profile.

6. Affects (40 Items)

Emotional state is evaluated using the Derogatis Affects Balance Scale (DABS), consisting of 40 mood adjectives evenly split between positive affects (Joy, Contentment, Vigor, Affection) and negative affects (Anxiety, Depression, Hostility, Guilt). Rather than merely measuring the absence of negative affect, the DABS calculates an Affects Balance Index (ABI) that reflects the dynamic equilibrium between positive emotional vitality and dysphoric mood states.

7. Gender Role Definition (30 Items)

Grounding itself in the theoretical premise that masculine and feminine characteristics represent independent, orthogonal constructs rather than a bipolar continuum, this subtest presents 15 stereotypically masculine and 15 stereotypically feminine personality adjectives. The respondent rates self-endorsement across these traits, generating independent Masculinity, Femininity, and combined Gender Role Definition scores that capture psychological androgyny or rigid sex-typing.

8. Fantasy (20 Items)

This subtest evaluates the breadth and thematic content of the respondent’s erotic mental imagery. Incorporating 20 major sexual fantasy themes identified in empirical literature—spanning conventional coital imagery, romantic encounters, exploratory variations, and clinical paraphilic motifs—the subtest quantifies the cognitive-erotic capacity to generate sexual arousal through symbolic mechanisms.

9. Body Image (15 Items)

Body image represents an individual’s subjective appraisal of their physical and somatic self, recognized as a pivotal determinant of sexual assertiveness and self-esteem. The subtest contains 10 general somatic items and 5 gender-keyed items evaluating satisfaction with primary and secondary sexual characteristics, physical attractiveness, and bodily proportions.

10. Sexual Satisfaction (10 Items)

Recognizing that sexual satisfaction is not a unitary phenomenon, this subtest uses a True/False format to assess an individual’s subjective contentment across 10 specific facets of their sexual relationship, including coital frequency, communication quality, partner responsiveness, orgasmic consistency, and foreplay adequacy.

Global Composite Metrics: SFI and GSSI

The DSFI generates two distinctive macro-level evaluative indices:

• Sexual Functioning Index (SFI): The objective, psychometrically standardized total score. Because the 10 subtests utilize vastly different raw metric ranges and some are gender-keyed, raw scores for each subtest are converted into area standard T-scores (mean = 50, standard deviation = 10) anchored to standardized normative reference samples. The unweighted linear summation of these 10 normalized T-scores yields the overall SFI.
• Global Sexual Satisfaction Index (GSSI): A distinct, subjective single-item rating continuum scaled from 0 (“Could not be worse”) to 8 (“Could not be better”). Each integer is anchored by explicit descriptive benchmarks, allowing respondents to synthesize their personal, phenomenological satisfaction independently of their objective actuarial profile.

Theoretical Framework

The theoretical architecture of the Derogatis Sexual Functioning Inventory is situated within the biopsychosocial model of medicine and psychiatry, originally conceptualized by George Engel, and intersects directly with the pioneering sexological paradigms of William Masters, Virginia Johnson, and Helen Singer Kaplan. Prior to Derogatis’s psychometric conceptualizations, sexological assessment was largely dominated by purely behavioral frameworks or psychoanalytic formulations. Masters and Johnson had mapped the human sexual response cycle into four physiological phases (Excitement, Plateau, Orgasm, Resolution), establishing clear somatic baselines for human sexual mechanics.

Subsequently, Helen Singer Kaplan reformulated this physiological cycle into a triphasic neurophysiological model comprising Desire, Arousal, and Orgasm. Kaplan highlighted that the initial phase—sexual desire—is deeply cognitive and affective, governed by limbic system processes and vulnerable to emotional interference, anticipatory performance anxiety, and intrapsychic conflict. Derogatis recognized that while Kaplan’s triphasic paradigm was clinically elegant, existing psychometric instruments failed to capture the multifaceted determinants of these phases.

The theoretical framework of the DSFI rests on three foundational psychometric and sexological axioms:

1. Multideterminism: Sexual behavior cannot be treated as an isolated physiological reflex. It is the observable output of an interactive biological, intrapsychic, interpersonal, and sociocultural network. Therefore, an adequate diagnostic battery must simultaneously evaluate cognitive literacy (Information), behavioral repertoire (Experiences), biological-appetitive drive (Drive), socio-cultural conditioning (Attitudes), psychopathological symptoms (BSI), emotional equilibrium (DABS), self-concept (Gender Role and Body Image), internal cognitive stimuli (Fantasy), and perceived relationship quality (Sexual Satisfaction).
2. Orthogonality of Affect and Personality: Derogatis integrated the premise that positive and negative affects are not merely opposing poles of a single unidimensional continuum. Drawing upon structural models of emotion, the DSFI posits that human sexual behavior flourishes under conditions of positive emotional balance (vitality, affection, contentment) and is systematically inhibited by negative affects (guilt, depression, anxiety). Similarly, drawing from the gender-schema theory advanced by Sandra Bem, gender identity within the DSFI is treated as comprising orthogonal dimensions of masculinity and femininity, allowing for the psychological modeling of androgyny.
3. Actuarial Standardization versus Phenomenological Appraisal: The DSFI embodies the theoretical necessity of dissociating objective psychosexual capacity from subjective satisfaction. Clinical experience demonstrates that a patient with marked physiological compromises may maintain high subjective satisfaction due to relationship intimacy and adaptive expectations, whereas a patient with intact physiological metrics may report severe subjective despair. By pairing the actuarial Sexual Functioning Index (SFI) with the phenomenological Global Sexual Satisfaction Index (GSSI), the DSFI captures both dimensions of clinical evaluation.

Validity

The construct, criterion-related, convergent, and discriminant validity of the Derogatis Sexual Functioning Inventory has been verified across numerous clinical trials, controlled experimental protocols, and epidemiological investigations over the past four decades.

Discriminant and Criterion-Related Validity

The DSFI has demonstrated strong discriminant validity across diverse diagnostic populations:

• Organic vs. Psychogenic Sexual Dysfunction: In a seminal investigation, Derogatis, Meyer, and Dupkin (1976) evaluated men presenting with erectile dysfunction utilizing nocturnal penile tumescence (NPT) monitoring alongside the DSFI. The DSFI successfully differentiated men with verified organic etiology from those with psychogenic erectile failure. Patients with psychogenic dysfunction exhibited statistically significant elevations on the Psychological Symptoms (BSI) subtest, marked negative Affects balance, pronounced Body Image concerns, and compromised Sexual Satisfaction scores, despite displaying comparable or higher baseline Drive and Experiences scores relative to organic cohorts.
• Gender Dysphoria Studies: The DSFI demonstrated robust sensitivity in clinical evaluations of individuals with gender dysphoria undergoing psychiatric and endocrinological evaluation prior to gender-affirming procedures. Statistically significant divergences were documented across the Gender Role Definition, Body Image, and Fantasy subscales when comparing gender-dysphoric individuals to cisgender normative controls, demonstrating the instrument’s sensitivity to core gender self-concept.
• Endocrine and Systemic Medical Disorders: In controlled studies evaluating sexual function in women with diabetes mellitus versus non-diabetic female controls, the DSFI identified selective deficits. Diabetic women showed significant reductions on the Drive and Sexual Satisfaction dimensions and increased negative Affects, while their Information and Attitude scores remained statistically indistinguishable from healthy controls. This confirmed the instrument’s capacity to pinpoint secondary psychosexual impacts of chronic systemic illness without conflating them with general cognitive deficits.
• Surgical Implant Efficacy: Clinical trials comparing surgical outcomes in men receiving inflatable versus non-inflatable (semi-rigid) penile prostheses utilized the DSFI as a primary longitudinal endpoint. The instrument detected statistically significant post-operative gains in the Experiences, Sexual Satisfaction, and SFI composite scores, with inflatable prostheses yielding superior improvements on the GSSI and Sexual Satisfaction subtests compared to rigid implants.

Convergent and Construct Validity

Convergent validity has been established by correlating the DSFI subscales with established single-construct psychometric measures. The Psychological Symptoms dimension exhibits correlations exceeding .85 with corresponding subscales of the Symptom Checklist-90-Revised (SCL-90-R). The Body Image subscale correlates strongly with the Secord-Jourard Body Cathexis Scale, while the Drive subtest correlates significantly with objective diary recordings of coital and masturbatory frequency (coefficients ranging from .65 to .81). Furthermore, investigations among patients with major depressive disorder (e.g., Howell et al., 1987) demonstrated that the DSFI Drive, Affects, and Sexual Satisfaction subscales correlate significantly with Hamilton Depression Rating Scale (HDRS) severity trajectories, capturing the sexual blunting characteristic of untreated depressive episodes.

Reliability

The Derogatis Sexual Functioning Inventory demonstrates robust psychometric reliability across diverse non-clinical cohorts and clinical diagnostic populations. Reliability analyses have evaluated internal consistency across its 10 substantive dimensions, as well as temporal stability (test-retest reliability) over established clinical monitoring intervals.

Internal Consistency

In the primary psychometric validation study conducted by Derogatis and Melisaratos (1979) involving a heterogeneous sample of 325 subjects, Cronbach’s alpha coefficients were calculated for each substantive subtest:

• Psychological Symptoms (BSI): Demonstrated the highest internal consistency, with alpha coefficients exceeding .95 (ranging from .95 to .97 across distinct diagnostic subgroups), reflecting the high internal homogeneity of its 53 distress items.
• Affects (DABS): Alpha coefficients for the positive and negative affect domains ranged from .84 to .91, establishing strong consistency in assessing emotional balance.
• Attitudes: Demonstrated strong internal consistency, yielding an alpha coefficient of .82 for the liberal items and .80 for the conservative items.
• Body Image: Yielded an internal consistency alpha coefficient of .83 across both universal and gender-keyed items.
• Gender Role Definition: Generated alphas of .81 for the Masculinity scale and .79 for the Femininity scale.
• Information, Drive, and Experiences: Exhibited moderate to high internal consistency, with coefficients ranging between .60 and .76. The relatively lower alpha for the Information subtest (.60) is consistent with psychometric expectations for broad factual knowledge inventories, where items span distinct physiological, anatomical, and contraceptive knowledge domains.
• Fantasy and Sexual Satisfaction: Yielded alpha coefficients of .84 and .78, respectively.

Test-Retest Stability

Temporal stability was evaluated across a standardized 14-day retest interval in stable adult cohorts (Derogatis & Melisaratos, 1979; Howell et al., 1987). Test-retest reliability coefficients predominantly ranged from the high .70s to the low .90s:

• Information: r = .84
• Experiences: r = .91
• Drive: r = .87
• Attitudes: r = .88
• Psychological Symptoms: r = .86
• Affects Balance Index: r = .78
• Gender Role: r = .82
• Fantasy: r = .85
• Body Image: r = .89
• Sexual Satisfaction: r = .81
• Sexual Functioning Index (SFI Total Score): r = .90

These findings demonstrate that while the DSFI remains responsive to therapeutic interventions and biological changes, its baseline dimensions reflect stable psychological and behavioral traits over time in the absence of clinical treatment.

Factor Analysis

The structural validity of the Derogatis Sexual Functioning Inventory has been substantiated through exploratory factor analyses (EFA) and subsequent confirmatory factor analyses (CFA) performed on its constituent subscales and their underlying items.

Subscale Dimensionality and Factor Structure

Because the DSFI is an omnibus battery composed of several distinct instruments, factor analyses have been executed both at the modular subscale level and at the macro-level of the combined inventory:

• Psychological Symptoms (BSI): Principal components analysis with varimax rotation reliably confirms the 9-factor primary symptom structure originally extracted from the SCL-90: Somatization, Obsessive-Compulsive, Interpersonal Sensitivity, Depression, Anxiety, Hostility, Phobic Anxiety, Paranoid Ideation, and Psychoticism. In confirmatory structural models, item loadings onto these primary latent factors generally exceed .55, with cross-loadings remaining low, supporting the construct validity of using either the global Symptoms score or distinct symptom profiles.
• Affects (DABS): Factor analytic investigations of the 40 mood adjectives demonstrate a distinct two-factor macro-structure representing Positive Affect and Negative Affect, which bifurcates into four second-order positive factors (Joy, Contentment, Vigor, Affection) and four second-order negative factors (Anxiety, Depression, Hostility, Guilt). Item factor loadings on intended constructs range from .48 to .82, supporting the multidimensional scoring structure of the Affects Balance Index.
• Gender Role Definition: Principal axis factoring with orthogonal rotation confirms that Masculinity and Femininity emerge as two distinct, uncorrelated factors rather than a single bipolar axis. Items such as “assertive,” “dominant,” and “independent” load strongly on the Masculinity factor (> .60), whereas items such as “nurturing,” “sensitive,” and “compassionate” load on the Femininity factor (> .60), supporting the scale’s alignment with two-dimensional models of gender identity.
• Attitudes: Factor analysis of the 30 attitude items confirms an orthogonal two-factor solution: Permissive/Liberal Sexual Attitudes and Traditional/Conservative Sexual Attitudes, with primary items exhibiting loadings exceeding .50 onto their respective factors.

Higher-Order Structural Models

When the 10 substantive subscale scores are entered into higher-order exploratory factor analyses, a three-factor overarching psychosexual structure emerges:

1. Psychological Distress and Affective Inhibition Factor: Marked by heavy loadings from Psychological Symptoms (BSI), negative Affects (DABS), and low Body Image.
2. Behavioral Competence and Libidinal Expression Factor: Characterized by high positive loadings from Drive, Experiences, Fantasy, and Information.
3. Relational and Evaluative Satisfaction Factor: Dominated by loadings from Sexual Satisfaction, the Global Sexual Satisfaction Index, positive Affects balance, and congruent Gender Role Definition.

This structural architecture supports Derogatis’s contention that human sexual functioning involves interacting cognitive-behavioral, psychological, and relational subsystems.

Instrument / Measurement Tool

The DSFI is a comprehensive, multidimensional battery consisting of 254 items across 10 subtests, accompanied by two global summary indices.

Structural Summary

• Administration Format: Self-report questionnaire, available in pencil-and-paper and specialized digital scoring formats.
• Total Item Count: 254 discrete items.
• Estimated Completion Time: 45 to 60 minutes for the full battery.
• Target Population: Adults aged 18 years and older; adapted for clinical sexology, psychiatric evaluations, and health outcome studies.

Subtest Organization and Item Formatting

• Subtest 1: Information
  • Item Count: 26 items.
  • Response Format: Binary True / False.
  • Scoring Method: Sum of correct answers (range: 0–26). Higher scores denote greater sexological knowledge.
• Subtest 2: Experiences
  • Item Count: 24 sexual behaviors.
  • Response Format: Dual reporting: lifetime occurrence (Yes / No) and behavioral engagement within the past 60 days.
  • Scoring Method: Simple summation of lifetime endorsed behaviors (range: 0–24), reflecting behavioral variety.
• Subtest 3: Drive
  • Item Count: 5 behavioral domains (intercourse, masturbation, kissing/petting, fantasy, ideal coital frequency).
  • Response Format: Frequency-anchored ordinal scales assessing recent rates of activity.
  • Scoring Method: Summation of ordinal frequency ratings across all five domains, producing a composite Drive score.
• Subtest 4: Attitudes
  • Item Count: 30 items (15 liberal, 15 conservative).
  • Response Format: 5-point Likert scale (1 = Strongly Disagree to 5 = Strongly Agree).
  • Scoring Method: Generates a Liberal Total, a Conservative Total, and a Net Attitude orientation score.
• Subtest 5: Psychological Symptoms (Brief Symptom Inventory)
  • Item Count: 53 items covering 9 clinical symptom dimensions.
  • Response Format: 5-point distress scale (0 = Not at all to 4 = Extremely).
  • Scoring Method: Summation across items for total distress score, with optional subscale scoring for the 9 primary symptom dimensions and the Global Severity Index (GSI).
• Subtest 6: Affects (Derogatis Affects Balance Scale)
  • Item Count: 40 emotional adjectives (20 positive, 20 negative).
  • Response Format: 5-point intensity endorsement scale (0 = Not at all to 4 = Extremely).
  • Scoring Method: Positive Affect Total minus Negative Affect Total, yielding the Affects Balance Index (ABI).
• Subtest 7: Gender Role Definition
  • Item Count: 30 personality adjectives (15 masculine, 15 feminine).
  • Response Format: Multi-point self-endorsement scale.
  • Scoring Method: Yields independent Masculinity and Femininity scores, as well as an integrated Gender Role Definition index.
• Subtest 8: Fantasy
  • Item Count: 20 erotic fantasy themes.
  • Response Format: Endorsement checklist (Yes / No).
  • Scoring Method: Simple summation of endorsed fantasy themes (range: 0–20).
• Subtest 9: Body Image
  • Item Count: 15 items (10 common somatic items, 5 gender-keyed anatomical items).
  • Response Format: Multi-point appraisal scale.
  • Scoring Method: Summation of item ratings into a composite Body Image score; higher scores reflect positive somatic satisfaction.
• Subtest 10: Sexual Satisfaction
  • Item Count: 10 distinct facets of the sexual relationship.
  • Response Format: Binary True / False.
  • Scoring Method: Summation of endorsed satisfaction items (range: 0–10).

Global Indices Scoring

• Sexual Functioning Index (SFI): Raw scores for each of the 10 subtests are first converted to area standard T-scores (mean = 50, standard deviation = 10) based on normative reference tables. The SFI is calculated as the direct unweighted linear summation of these 10 normalized T-scores.
• Global Sexual Satisfaction Index (GSSI): An independent, single-item subjective rating on a 9-point scale anchored from 0 (“Could not be worse”) to 8 (“Could not be better”). Each integer is paired with descriptive anchors, providing an immediate phenomenological index of sexual well-being.

Permissions & Fee and Test Year

• Publication History: The initial conceptual architecture of the DSFI was published by Leonard R. Derogatis in 1975 and 1976, with the comprehensive psychometric validation and scoring manual published in 1979 (Derogatis & Melisaratos, 1979; Derogatis, 1980).
• Copyright & Intellectual Property: The Derogatis Sexual Functioning Inventory, along with its integrated proprietary components (the Brief Symptom Inventory and the Derogatis Affects Balance Scale), is protected by international copyright law. All intellectual property rights are held exclusively by Leonard R. Derogatis and Clinical Psychometric Research, Inc.
• Licensing and Commercial Distribution: The DSFI is a copyrighted, proprietary clinical instrument and is not in the public domain. Formal access requires the acquisition of official test booklets, user manuals, and scoring profiles distributed exclusively through Clinical Psychometric Research, Inc. (official portal: www.derogatis-tests.com).
• Fees: Use in clinical practice, healthcare systems, or funded pharmaceutical and academic trials requires per-administration licensing fees and the purchase of authorized materials. Special educational or non-commercial research licensing may be granted upon formal application to the copyright holder.
• Available Translations: The DSFI has been translated and psychometrically adapted into numerous languages, including Arabic, Chinese, English, French, French-Canadian, Hindi, Korean, Norwegian, Spanish, and Turkish.

References

Conte, H. R. (1983). Development and use of self-report techniques for assessing sexual function: A review and critique. Archives of Sexual Behavior, 12(6), 555–576. https://doi.org/10.1007/BF01542220

Derogatis, L. R. (1975). Derogatis Sexual Functioning Inventory (DSFI): Preliminary scoring manual. Clinical Psychometric Research Inc.

Derogatis, L. R. (1980). Psychological assessment of psychosexual functioning. The Psychiatric Clinics of North America, 3(1), 113–131. https://doi.org/10.1016/S0193-953X(18)30978-4

Derogatis, L. R. (1993). Brief Symptom Inventory: Administration, scoring, and procedures manual (3rd ed.). National Computer Systems.

Derogatis, L. R., Lopez, M. C., & Zinzeletta, E. M. (1988). Clinical applications of the DSFI in the assessment of sexual dysfunctions. In R. Brown & E. Roberts (Eds.), Advances in the understanding and treatment of sexual disorders (pp. 42–68). PNA Publishing.

Derogatis, L. R., & Melisaratos, N. (1979). The DSFI: A multidimensional measure of sexual functioning. Journal of Sex & Marital Therapy, 5(3), 244–281. https://doi.org/10.1080/00926237908403733

Derogatis, L. R., Meyer, J. K., & Dupkin, C. N. (1976). Discrimination of organic versus psychogenic impotence with the DSFI (Derogatis Sexual Functioning Inventory). Journal of Sex & Marital Therapy, 2(3), 229–240. https://doi.org/10.1080/00926237608406322

Derogatis, L. R., & Rutigliano, P. J. (1996). The Derogatis Affects Balance Scale (DABS). In B. Spilker (Ed.), Quality of life and pharmacoeconomics in clinical trials (2nd ed., pp. 160–177). Lippincott-Raven Publishers.

Derogatis, L. R., Schmidt, C. W., Fagan, P. J., & Wise, T. N. (1989). Subtypes of anorgasmia via mathematical taxonomy. Psychosomatics, 30(2), 166–173. https://doi.org/10.1016/S0033-3182(89)72295-8

Howell, J. R., Reynolds, C. F., Thase, M. E., Frank, E., Jennings, J. R., Houck, P. R., & Kupfer, D. J. (1987). Assessment of sexual function, interest, and activity in depressed men. Journal of Affective Disorders, 13(1), 61–66. https://doi.org/10.1016/0165-0327(87)90073-6

Items of the Scale