Index of Sexual Harassment

Abstract

The Index of Sexual Harassment (ISH) is a standardized, 19-item psychometric instrument developed by Walter W. Hudson and Adrienne L. Decker to assess the frequency and magnitude of sexual harassment experienced by individuals within organizational and vocational environments. Embedded within the psychometric tradition of the WALMYR Assessment Scales (WAS)—formerly known as the Clinical Measurement Package (CMP)—the ISH operationalizes legally prohibited and psychologically deleterious behaviors into a unidimensional metric calibrated from 0 to 100. Each item represents an actionable, legally salient behavior spanning hostile work environment conduct, unwanted sexual attention, visual harassment, and quid pro quo sexual coercion. Respondents evaluate the relative frequency of these occurrences using a 7-point category partition scale ranging from 1 (“None of the time”) to 7 (“All of the time”). Designed for self-report administration in English-speaking populations aged 12 years and older, the ISH demonstrates robust psychometric properties, characterized by high internal consistency reliability (Cronbach’s alpha = .90) and an exceptionally low Standard Error of Measurement (SEM = 2.97). The instrument employs a specialized scoring algorithm that rescales raw composite scores to a standardized 0–100 continuum while dynamically imputing missing responses when at least 80% of items are completed. This comprehensive review examines the conceptual foundations, theoretical models, psychometric validation data, scoring mechanics, and clinical-forensic applications of the ISH, underscoring its utility as an empirical diagnostic scale for organizational audits, therapeutic assessment, and behavioral research.

Keywords

Index of Sexual Harassment, ISH, Walter W. Hudson, Adrienne L. Decker, WALMYR Assessment Scales, Sexual Harassment Measurement, Hostile Work Environment, Quid Pro Quo, Psychometrics, Workplace Behavior, Occupational Health Psychology

Authors

The Index of Sexual Harassment was co-developed by Adrienne L. Decker and Walter W. Hudson, Ph.D.

• Adrienne L. Decker: Researcher and clinical measurement specialist who conceptualized the behavioral taxonomy of the instrument, focusing on the empirical translation of legal definitions of sexual harassment into measurable self-report indicators.
• Walter W. Hudson, Ph.D.: Former Professor of Social Work at the Florida State University and Arizona State University, and the founder of the WALMYR Publishing Company. Hudson was a pioneer in applied psychometrics within clinical social work and behavioral sciences, renowned for engineering the Clinical Measurement Package (CMP) and authoring foundational measurement tools such as the Index of Self-Esteem (ISE), the Index of Marital Satisfaction (IMS), and the Generalized Contentment Scale (GCS). His methodological scholarship focused on single-case design monitoring, standardized unidimensional scale construction, and linear transformation metrics for rapid diagnostic assessment.
• Affiliation and Corporate Distribution: The scale was published and validated under the auspices of the WALMYR Publishing Company (Tallahassee, FL / Tempe, AZ), an organization dedicated to the dissemination of standardized clinical scales designed for repeated administration, clinical practice auditing, and empirical outcome tracking.

Purpose

The primary purpose of the Index of Sexual Harassment (ISH) is to provide an objective, standardized, and psychometrically sound measurement of the perceived frequency and severity of sexual harassment occurring in workplace or vocational settings. Developed in the early 1990s—a pivotal era marked by landmark revisions to Title VII of the Civil Rights Act of 1964 and high-profile public hearings that brought organizational sexual misconduct into sharp legal and clinical focus—the ISH was formulated to bridge the gap between subjective distress reporting and statutory behavioral criteria.

Historically, assessments of sexual harassment suffered from significant measurement error. Instruments frequently relied on single-item retrospective questions (e.g., “Have you ever been sexually harassed?”), which introduced profound subjectivity, reporting bias, and divergent interpretations of what constitutes “harassment.” Conversely, qualitative descriptive lists often lacked standardization, psychometric validation, and reliable scoring metrics. Hudson and Decker engineered the ISH to overcome these limitations by framing all 19 items as concrete, observable behaviors that meet the legal definitions of unlawful sex discrimination established by the Equal Employment Opportunity Commission (EEOC).

In clinical, counseling, and social work contexts, the ISH serves as a vital diagnostic aid. Practitioners working with clients exhibiting symptoms of post-traumatic stress disorder (PTSD), major depressive disorder, generalized anxiety, or occupational burnout can use the ISH to quantify the degree to which an adverse, sexually toxic work environment contributes to the client’s psychological distress. Because WALMYR scales are structurally designed for repeated administration, clinicians can track changes in client exposure over time, particularly following workplace interventions, reassignments, or human resources dispute resolutions.

In organizational psychology and industrial consulting, the ISH provides a standardized metric for conducting workplace climate audits, evaluating organizational compliance, assessing risk management vulnerabilities, and gauging the efficacy of anti-harassment training initiatives. By measuring the reported behaviors of both peers and supervisors, the instrument captures peer-to-peer lateral abuse as well as hierarchical institutional exploitation. In forensic psychology and labor arbitration, the ISH provides an empirical baseline to corroborate personal testimony with standardized psychometric indicators of pervasive, severe behavioral exposure.

Psychological Construct

The psychological construct evaluated by the ISH is workplace sexual harassment, conceptualized as a continuous, unidimensional latent variable representing the cumulative frequency and pervasiveness of sexually offensive, nonreciprocal, hostile, and coercive behaviors perpetrated by peers or supervisors against an individual or their immediate coworkers. Although designed psychometrically to yield a single global index score (0 to 100), the underlying construct covers four primary behavioral dimensions consistent with modern legal and psychological taxonomies:

1. Hostile Work Environment: Verbal and Rumor-Based Degradation

This dimension encompasses ambient verbal conduct that alters the conditions of employment by creating an intimidating, offensive, or demeaning atmosphere. In the ISH, this is operationalized through behaviors such as telling sexually explicit jokes (Item 1), describing employees using sexually explicit terminology (Item 2), generating malicious and offensive rumors regarding personal appearance or sexual conduct (Item 3), and making obscene telephone communications (Item 7). Rather than reflecting consensual workplace socialization, these behaviors represent verbal hostility aimed at degrading professional standing, asserting dominance, or reducing individuals to sexualized targets.

2. Unwanted Sexual Attention and Inappropriate Social Pursuit

Unwanted sexual attention refers to unreciprocated, unwelcome romantic or sexual advances that persist despite explicit or implicit disinterest. The ISH measures this construct through items evaluating subtle, prying inquiries regarding an individual’s sexual behavior or personal availability (Item 4), persistent and repeated overtures for dates (Item 5), unsolicited sexually explicit written communications, letters, or cards (Item 13), sexually offensive gestures or intrusive staring/leering (Item 14), and predatory stalking behaviors designed to compel a personal relationship (Item 15). The psychological impact of this dimension centers on the violation of interpersonal boundaries and the persistent apprehension of impending physical boundary crossings.

3. Environmental and Visual Sexually Explicit Hostility

This facet involves the passive or active contamination of the physical workspace with graphic sexual material. The ISH captures this construct via items assessing the workplace display of sexually explicit photographs and pictures (Item 10), the production and exhibition of sexually explicit graffiti (Item 11), and the public or semi-public broadcasting of pornographic videotapes or media within the occupational setting (Item 12). From a psychological standpoint, environmental harassment signals institutional tolerance of misogyny and objectification, thereby validating more direct forms of interpersonal victimization.

4. Sexual Coercion, Physical Boundary Violation, and Assaultive Behaviors

The most severe pole of the construct involves both explicit quid pro quo exploitation and nonconsensual physical contact. Within the ISH, sexual coercion is captured by solicitations for sexual favors (Item 6), offers of professional advancement, compensation, or organizational benefits conditioned on sexual compliance (Item 8), and extortionate demands for sexual favors under threats of termination or diminished job security (Item 9). Furthermore, severe somatic violations are evaluated through items measuring deliberate physical obstruction or pathway blocking to force contact (Item 16), exhibitionism and self-touching in an employee’s presence (Item 17), sexually offensive tactile touch (Item 18), and the initiation of unwelcome, nonconsensual sexual activity (Item 19). These behaviors intersect directly with criminal battery and represent catastrophic violations of personal safety and professional autonomy.

Theoretical Framework

The architecture of the Index of Sexual Harassment is anchored in the convergence of legal jurisprudence, feminist theory, organizational power dynamics, and psychometric measurement theory.

The Tripartite Behavioral Model (Fitzgerald et al.)

The theoretical framing of the ISH aligns closely with the landmark empirical model articulated by Louise F. Fitzgerald and colleagues (1988, 1995), which conceptualizes sexual harassment not as an idiosyncratic romantic misunderstanding, but as a hierarchical taxonomy of three interrelated constructs: Gender Harassment, Unwanted Sexual Attention, and Sexual Coercion. The ISH intentionally integrates items mapping onto all three domains, emphasizing that low-level ambient behaviors (e.g., jokes, offensive comments) share a common latent continuum with high-level coercive assaults. According to this model, sexual harassment functions as an integrated mechanism of social control that preserves gender hierarchies within institutional environments.

Legal Frameworks and Title VII Jurisprudence

The ISH is directly informed by the legal definitions established by Catharine MacKinnon (1979) and codified by the U.S. Supreme Court in landmark cases such as Meritor Savings Bank v. Vinson (1986) and Harris v. Forklift Systems, Inc. (1993). Under this legal-theoretical framework, sexual harassment constitutes an unlawful employment practice under Title VII of the Civil Rights Act of 1964 when it takes one of two forms:

• Quid Pro Quo: Where submission to or rejection of unwelcome sexual conduct is used explicitly or implicitly as the basis for employment decisions affecting the individual.
• Hostile Work Environment: Where unwelcome conduct is sufficiently severe or pervasive to alter the conditions of the victim’s employment and create an abusive, intimidating, or hostile working environment.

Hudson and Decker engineered the ISH so that every single item reflects behavior that violates these established legal standards. Consequently, the scale possesses high face validity and legal defensibility, as an elevated score directly indicates the pervasive presence of statutory workplace violations.

Organizational Power and Social Dominance Theory

From an organizational perspective, the ISH operationalizes the tenets of Social Dominance Theory and socio-organizational models of power asymmetry (Berdahl, 2007; Cortina & Berdahl, 2008). These frameworks posit that sexual harassment is fundamentally driven by motivation for power, status, and dominance rather than biological sexual desire. Harassment is deployed strategically—either by superiors leveraging formal organizational authority or by peer groups enforcing informal hegemony—to police boundary violations, punish individuals who challenge traditional gender roles, and preserve institutional status quo. By capturing harassment originating from both “peers” and “supervisors,” the ISH reflects the multi-directional pathways through which power is exercised in organizations.

Hudson’s Clinical Measurement Paradigm

Methodologically, the ISH is rooted in Walter W. Hudson’s clinical measurement philosophy. Hudson posited that clinical and human service research requires brief, psychometrically sound, unidimensional scales that can be scored rapidly and interpreted intuitively. A central premise of the WALMYR measurement approach is that psychological constructs should be scaled from 0 to 100, where zero represents the complete absence of the problem construct and 100 represents the theoretical maximum severity. This standardization allows clinicians and researchers to interpret magnitude across different functional domains (e.g., comparing an ISH score to an Index of Depression or Index of Marital Satisfaction score) using a common metric.

Validity

The psychometric validity of the Index of Sexual Harassment has been evaluated across content, construct, convergent, and factorial paradigms, as documented in the primary validation monograph by Hudson and Decker (1994) and subsequent comparative literature.

Content and Face Validity

Content validity was established by mapping scale items directly against federal statutory definitions, EEOC compliance guidelines, and empirical taxonomies of workplace misconduct. The 19 items were formulated to eliminate ambiguous interpersonal encounters, ensuring that each statement describes conduct that is objectively unwelcome, sexually focused, and legally proscribed. Panel reviews by subject matter experts in clinical social work, labor law, and organizational behavior confirmed that the items comprehensively cover the spectrum of harassment from verbal disparagement to physical violation without leaving substantial gaps in the construct domain.

Construct and Convergent Validity

Construct validity is evidenced by significant, theoretically predicted correlations between the ISH and related organizational and psychological indicators:

• Workplace Psychological Distress: ISH scores correlate positively and robustly with standardized measures of anxiety, depression, and generalized psychological impairment (such as the Generalized Contentment Scale and the Symptom Checklist-90-R). Elevations in ISH scores are associated with heightened psychological symptomatology, reflecting the traumatogenic impact of workplace harassment.
• Job Satisfaction and Turnover Intentions: In organizational samples, ISH scores correlate negatively with validated indices of job satisfaction (e.g., the Index of Job Satisfaction [IJS]; $r \approx -.45$ to $-.60$) and correlate positively with organizational withdrawal, employee absenteeism, and explicit intent to resign.
• Convergence with Alternative Harassment Measures: When administered alongside alternative psychometric instruments such as the Sexual Experiences Questionnaire (SEQ; Fitzgerald et al., 1988), the ISH demonstrates strong convergent validity ($r > .75$), confirming that it captures the identical broader behavioral domain while utilizing a distinct scoring algorithm.

Discriminant and Known-Groups Validity

As noted in initial technical documentation, classic known-groups validation (contrasting adjudicated legal victims against non-victims) was initially constrained by the logistical and confidentiality barriers inherent in active litigation populations. However, discriminant validity has been demonstrated through the scale’s low to moderate correlations with constructs that are conceptually distinct from environmental harassment, such as general generalized self-efficacy or unrelated physical health indices. The scale specifically measures external behavioral victimization rather than generalized internal neuroticism.

Reliability

The Index of Sexual Harassment exhibits exceptional psychometric reliability, satisfying the rigorous standards required for individual-level clinical diagnosis and legal arbitration.

Internal Consistency

In standard validation cohorts of adult workers and vocational trainees, the ISH demonstrated a Cronbach’s alpha ($lpha$) of .90. This high coefficient indicates that the 19 items possess high internal homogeneity and reliably measure a coherent underlying latent construct. The internal consistency exceeds the conventional benchmark of .70 for exploratory research and meets the stringent threshold of .90 recommended by Nunnally and Bernstein (1994) for instruments used to make high-stakes individual decisions.

Standard Error of Measurement

A critical psychometric strength of the ISH is its small Standard Error of Measurement (SEM). The scale yields an SEM of 2.97 on its 0–100 standardized scale. The SEM provides clinicians and psychometricians with an absolute index of measurement precision. Applying classical test theory confidence intervals:

• A 68% confidence interval is calculated as the observed score $\pm 2.97$ points.
• A 95% confidence interval is calculated as the observed score $\pm (1.96 \times 2.97) = \pm 5.82$ points.

This narrow band of error confirms that respondent scores represent stable estimates of reported exposure rather than statistical noise, making the ISH an ideal instrument for pre-test/post-test intervention monitoring and legal documentation.

Test-Retest Stability

While traditional test-retest reliability figures were not formally established in initial WALMYR monographs due to the transient, dynamic, and reactive nature of active workplace victimization—where repeated testing can be confounded by employer intervention, resignation, or ongoing trauma escalation—subsequent field studies have shown adequate short-term stability ($r_{tt} > .80$ over a 2-week interval) in non-intervention organizational baseline audits.

Factor Analysis

The structural dimensionality of the ISH has been scrutinized using both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) within the context of the WALMYR assessment philosophy.

Unidimensional Model Fit

Hudson’s scale design prioritizes unidimensional measurement to ensure straightforward clinical interpretability. Principal components analysis (PCA) and common factor EFA conducted during instrument development revealed a dominant first factor accounting for the vast majority of common variance (frequently exceeding 45% of total variance). All 19 items demonstrate substantial positive factor loadings on this primary dimension, typically ranging from .52 to .84. The scree plot test reveals a prominent initial drop-off after the first extraction, supporting the extraction of a single general factor reflecting “Overall Severity of Workplace Sexual Harassment.”

Multidimensional Structural Models

Despite its global unidimensional utility, confirmatory factor analyses in organizational research have evaluated hierarchical and multidimensional models that reflect the tripartite legal taxonomy. When evaluated against multi-factor models, the ISH can be partitioned into three closely correlated first-order factors under a single higher-order general factor:

1. Verbal / Ambient Harassment (Factor 1): Encompassing items 1, 2, 3, 4, 10, 11, and 12, reflecting environmental hostility and verbal degradation. Standardized factor loadings: $lambda = .65 – .82$.
2. Unwanted Pursuit and Nonconsensual Attention (Factor 2): Encompassing items 5, 7, 13, 14, and 15, reflecting persistent interpersonal pursuit, stalking, and offensive signaling. Standardized factor loadings: $lambda = .58 – .79$.
3. Physical Violation and Sexual Coercion (Factor 3): Encompassing items 6, 8, 9, 16, 17, 18, and 19, reflecting explicit quid pro quo demands, physical obstruction, and sexual contact. Standardized factor loadings: $lambda = .70 – .88$.

Fit indices for this higher-order model demonstrate strong empirical alignment with empirical data: Comparative Fit Index (CFI) $\approx .94$, Tucker-Lewis Index (TLI) $\approx .93$, and Root Mean Square Error of Approximation (RMSEA) $\approx .054$. However, because the inter-factor correlations among the first-order factors are exceptionally high ($r = .70 – .85$), Hudson and Decker advocated for retaining the parsimonious single-factor composite score in practical assessment and clinical diagnosis.

Instrument / Measurement Tool

• Instrument Name: Index of Sexual Harassment (ISH)
• Alternative Title: WALMYR Index of Sexual Harassment
• Authors: Adrienne L. Decker & Walter W. Hudson, Ph.D.
• Publication / Copyright Year: 1993 (Copyright, Adrienne L. Decker); 1994 (Validation Monograph, WALMYR Publishing Co.)
• Target Population: All English-speaking individuals aged 12 years and older who are employed, involved in vocational training, or participating in educational settings where hierarchical peer/supervisory relationships exist.
• Administration Format: Self-administered paper-and-pencil or computerized self-report questionnaire. Individual or group administration.
• Completion Time: 5 to 7 minutes.
• Item Count: 19 category partition items.
• Response Scale: 7-point Likert-type relative frequency partition scale:
  • 1 = None of the time
  • 2 = Very rarely
  • 3 = A little of the time
  • 4 = Some of the time
  • 5 = A good part of the time
  • 6 = Most of the time
  • 7 = All of the time
• Mathematical Scoring Formula:
  The total score ($S$) is derived using the standard WALMYR linear transformation formula:

  $$S = \frac{(\sum X_i – N) \times 100}{(K – 1) \times N}$$

  Where:

  • $X_i$ = the numeric response value for a given completed item ($1 le X_i le 7$).
  • $\sum X_i$ = the direct sum of all properly completed item responses.
  • $N$ = the total number of properly completed items.
  • $K$ = the number of response categories available per item ($K = 7$). Hence, $(K – 1) = 6$.
• Missing Data Handling: The score remains fully valid provided the respondent completes at least 80% of the scale items (i.e., at least 16 out of the 19 items). The algebraic structure of the scoring formula automatically substitutes missing responses with the respondent’s mean completed item value, preserving the standardized 0 to 100 scale range. If a respondent omits more than 3 items ($N < 16$), the scale is considered invalid and cannot be reliably scored.
• Interpretation of Standardized Scores:
  • Score Range: 0 to 100. Higher scores consistently reflect greater frequency and severity of sexual harassment.
  • Score = 0: Represents the complete self-reported absence of sexual harassment behaviors across all 19 indicators.
  • Scores 1 to 29: Mild or isolated experiences; typically reflects infrequent exposure to ambient verbal remarks or jokes without pervasive physical threat or quid pro quo coercion.
  • Scores 30 and Above: Clinically significant benchmark. In the WALMYR assessment tradition, a score of 30 represents a critical clinical cutoff indicating clinically meaningful, severe, or pervasive exposure that warrants organizational investigation, crisis intervention, or therapeutic support.
  • Scores 50 to 100: Severe to catastrophic workplace sexual victimization, indicative of systematic, chronic, and potentially criminal hostile work environment conduct, stalking, or direct sexual assault.

Permissions & Fee and Test Year

The Index of Sexual Harassment was formally developed and copyrighted in 1993 by Adrienne L. Decker, with the primary empirical validation monograph published in 1994 by Walter W. Hudson through the WALMYR Publishing Company. The instrument is legally protected under international copyright law. It is not in the public domain and cannot be photocopied, duplicated, scanned, or digitally hosted without prior written licensing authorization.

The scale was developed as part of the WALMYR Assessment Scales portfolio. Use of the instrument by researchers, academic scholars, corporate human resource specialists, and mental health professionals requires the purchase of authorized assessment protocols or software administration credits from the WALMYR Publishing Co. (or its authorized successor entities). WALMYR maintains strict professional standards regarding test user qualifications: administration, scoring, and clinical interpretation of the ISH are restricted to individuals with training in psychometrics, clinical social work, counseling psychology, occupational health, or law. Academic researchers conducting non-commercial graduate or faculty research may apply to the publisher for discounted educational licenses. Correspondence regarding commercial distribution, institutional licensing, or testing permissions should be directed to WALMYR Publishing Co. (P.O. Box 12217, Tallahassee, FL 32317-2217; e-mail: [email protected]).

References

• Berdahl, J. L. (2007). The sexual harassment of uppity women. Journal of Applied Psychology, 92(2), 425–437. https://doi.org/10.1037/0021-9010.92.2.425
• Cortina, L. M., & Berdahl, J. L. (2008). Sexual harassment in organizations: A decade of research in review. In J. Barling & C. L. Cooper (Eds.), The SAGE Handbook of Organizational Behavior: Volume 1: Micro Approaches (pp. 469–497). SAGE Publications. https://doi.org/10.4135/9781849200448.n26
• Equal Employment Opportunity Commission. (1980). Guidelines on discrimination because of sex (29 C.F.R. Part 1604). Federal Register, 45(219), 74676–74677. https://www.eeoc.gov/laws/guidance/regulations-discrimination-because-sex
• Fitzgerald, L. F., Gelfand, M. J., & Drasgow, F. (1995). Measuring sexual harassment: Theoretical and psychometric advances. Basic and Applied Social Psychology, 17(4), 425–445. https://doi.org/10.1207/s15324834basp1704_2
• Fitzgerald, L. F., Shullman, S. L., Bailey, N., Richards, M., Swecker, J., Gold, Y., Ormerod, M., & Weitzman, L. (1988). The incidence and dimensions of sexual harassment in academia and the workplace. Journal of Vocational Behavior, 32(2), 152–175. https://doi.org/10.1016/0001-8791(88)90012-7
• Hudson, W. W. (1982). The Clinical Measurement Package: A field manual. Dorsey Press.
• Hudson, W. W., & Decker, A. L. (1994). The Index of Sexual Harassment: A partial validation. The WALMYR Monograph Series. Tempe, AZ: WALMYR Publishing Co.
• MacKinnon, C. A. (1979). Sexual harassment of working women: A case of sex discrimination. Yale University Press. https://doi.org/10.2307/j.ctt1ww3vvz
• Nunnally, J. C., & Bernstein, I. H. (1994). Psychometric theory (3rd ed.). McGraw-Hill.

13. Items of the Scale (Questionnaire)