Least Preferred Coworker

1. Abstract

The Least Preferred Coworker (LPC) Scale, developed by Austrian-American psychologist Fred Edward Fiedler in the 1950s and formalized in his seminal 1967 monograph A Theory of Leadership Effectiveness, is one of the most widely researched and debated psychometric instruments in industrial-organizational psychology, organizational behavior, and leadership studies. Designed to operationalize an individual’s underlying leadership style and motivational hierarchy, the instrument requires a respondent to mentally identify the single individual with whom they have worked least well across their entire professional career, and subsequently evaluate that individual across a battery of 8-point bipolar semantic differential adjective pairs. While 16-, 18-, 20-, and 24-item variants exist across historical iterations, the standardized 15-item version measures an enduring, trait-like leadership orientation reflecting primary motivational goals.

Psychometrically, a high aggregate score (typically operationalized as 73 or higher on the standardized scoring framework) designates a relationship-oriented leadership orientation, wherein the leader differentiates between a coworker’s professional task incompetence and their intrinsic human worth, maintaining strong interpersonal goals. Conversely, a low aggregate score (63 or lower) characterizes a task-oriented leadership orientation, wherein a coworker’s inability to facilitate task execution severely degrades the respondent’s global affective evaluation of that person. Scores spanning 64 to 72 represent a socio-independent, middle-LPC orientation that balances both task-completion and socio-emotional demands. The LPC scale constitutes the operational backbone of Fiedler’s Contingency Model of Leadership Effectiveness, which posits that group performance is a joint function of a leader’s motivational style (measured via the LPC) and situational favorability, determined by leader-member relations, task structure, and position power. Across decades of validation studies spanning more than 2,000 adult participants in military, educational, industrial, and health-care settings, the LPC scale has demonstrated split-half reliability coefficients ranging between .86 and .92, test-retest stabilities ranging from .67 to .81, and robust, albeit theoretically complex, construct and predictive validity across diverse organizational ecologies.

2. Keywords

Least Preferred Coworker, LPC Scale, Fred Fiedler, Contingency Theory of Leadership, Leadership Style, Task-Oriented Leadership, Relationship-Oriented Leadership, Semantic Differential, Industrial and Organizational Psychology, Situational Favorability, Leader-Member Relations, Psychometrics.

3. Authors

The Least Preferred Coworker (LPC) Scale was conceptualized, formulated, and refined by Fred Edward Fiedler, Ph.D. (1922–2017). At the time of the instrument’s primary conceptual inception and early psychometric validation, Fiedler was Professor of Psychology and Director of the Group Effectiveness Research Laboratory at the University of Illinois Urbana-Champaign. He subsequently served as Professor of Psychology and Management and Organization at the University of Washington, where he directed the Center for Organizational Research.

Prominent lifelong collaborators who contributed to the psychometric refinement, normative data collection, and applied intervention designs (such as the Leader Match training program) include Martin M. Chemers, Ph.D. (University of California, Santa Cruz) and Joseph E. Garcia, Ph.D. (Western Washington University). Correspondence and theoretical preservation regarding Fiedler’s archival experimental datasets are maintained through major academic repositories and the organizational behavior archives of the University of Washington Foster School of Business and the University of Illinois Department of Psychology.

4. Purpose

The primary purpose of the Least Preferred Coworker (LPC) Scale is to quantify an individual’s fundamental leadership style, cognitive complexity, and underlying motivational hierarchy within collective task environments. Unlike behavioral checklists that quantify what a leader overtly does (such as initiating structure or showing consideration), the LPC functions as a projective-like semantic differential probe designed to reveal what a leader fundamentally values when placed under occupational pressure. The scale operates on the assumption that an individual’s cognitive appraisal of their least productive or most frustrating coworker serves as a psychological mirror, exposing the core operational drives that govern their behavior in organizational settings.

Theoretical and Practical Rationale

In traditional psychometrics, self-report leadership scales are notoriously susceptible to social desirability bias, impression management, and retrospective self-justification. If asked directly, “Are you more concerned with getting the job done or maintaining warm personal relationships?” most modern managers recognize the organizational demand characteristics and answer that they balance both equally. Fiedler bypassed this vulnerability by shifting the evaluative target away from the leader’s own identity onto a salient, external reference figure: the coworker with whom the leader found it most difficult to achieve work objectives. By compelling respondents to rate an individual who actively hindered performance, the scale exposes whether the respondent emotionally decouples professional competence from interpersonal worth (yielding a high LPC score) or inexorably fuses task failure with negative personal character (yielding a low LPC score).

Research Applications

In academic and empirical research, the LPC scale has been utilized across thousands of investigations to:

• Test Contingency Hypotheses: Serve as the independent variable in organizational experiments examining how personality traits interact with external situational variables (task structure, leader position power, and leader-member group atmosphere) to predict objective unit productivity.
• Investigate Stress and Cognitive Resources: Fuel research under Cognitive Resource Theory (Fiedler & Garcia, 1987), exploring how intellectual ability, technical expertise, and interpersonal stress moderate the relationship between LPC scores and group performance.
• Examine Attributional Complexity: Provide cognitive social psychologists with an index of interpersonal attributional complexity, cognitive differentiation, and psychological distance in interpersonal relations.

Organizational and Clinical Applications

In applied organizational development, executive assessment, and leadership coaching, the LPC scale serves a diagnostic rather than a pure selection purpose. Because Fiedler’s contingency model asserts that leadership style is an enduring, largely invariant trait that cannot be easily transformed through short-term training, the LPC score is not interpreted as “good” or “bad” in the abstract. Instead, it is used in organizational engineering and job redesign—exemplified by Fiedler and Chemers’ (1984) Leader Match curriculum—to diagnose a manager’s orientation and systematically modify their situational control (adjusting task protocols, clarifying or delegating authority, and managing socio-emotional dynamics) so that the environment matches their intrinsic LPC profile.

5. Psychological Construct

The construct captured by the Least Preferred Coworker scale has been the subject of extensive psychometric examination. While originally labeled as an index of “emotional distance” or “assumed similarity between opposites” (ASo), decades of empirical convergence led Fiedler, Rice (1978), and contemporary psychometricians to conceptualize LPC as reflecting a fundamental motivational hierarchy and cognitive differentiation style. The scale reveals an individual’s primary versus secondary needs under conditions of organizational stress and freedom.

The High-LPC Construct: Relationship-Oriented Motivation

An individual with a high LPC score (73 or above) evaluates their least preferred coworker in relatively charitable, favorable, or balanced terms (e.g., scoring them toward the positive anchors such as friendly, supportive, and open, even while acknowledging their low work efficiency). This pattern reveals several core psychological properties:

• Cognitive Differentiation: High-LPC individuals demonstrate high cognitive complexity. They successfully decouple a person’s technical utility or task performance from their intrinsic human dignity and interpersonal desirability. They can mentally register: “This individual was inefficient and frustrating on the assembly line, yet they remain a warm, pleasant, and worthy human being.”
• Primary Interpersonal Needs: The primary, overarching goal of the high-LPC leader is the establishment and maintenance of harmonious, close, and supportive interpersonal relationships.
• Secondary Task Needs: Task achievement is secondary. Under conditions where interpersonal relationships are secure and socio-emotional anxiety is low, high-LPC individuals happily attend to task-related challenges. However, when social friction, interpersonal tension, or relational rupture occurs, their cognitive resources are immediately diverted to repairing group dynamics.

The Low-LPC Construct: Task-Oriented Motivation

An individual with a low LPC score (63 or below) rates their least preferred coworker with uniformly harsh, rejecting, and punitive adjectives (e.g., scoring them as cold, quarrelsome, unfriendly, and gloomy). The psychological construct operating here includes:

• Cognitive Fusion of Task and Persona: Low-LPC individuals display low tolerance for task failure. For them, an individual’s value within a work collective is inextricably linked to their competence and contribution to the shared objective. When a coworker jeopardizes the task, the low-LPC rater experiences intense frustration and views the individual as personally uncooperative, hostile, or unpleasant.
• Primary Task Mastery Needs: The fundamental motivational drive is task completion, operational success, and tangible material output. Low-LPC leaders derive their personal self-esteem, psychological security, and professional identity from successfully orchestrating and completing goals.
• Secondary Interpersonal Needs: Interpersonal relationships are a secondary priority. When the task is progressing smoothly, highly structured, and proceeding without threat, the low-LPC leader can display warmth, humor, and relaxed collegiality. However, the moment task completion is endangered, social pleasantries are discarded in favor of directive command, unilateral control, and immediate problem resolution.

The Middle-LPC Construct: Socio-Independent Orientation

Respondents falling in the intermediate range (scores 64 to 72) are classified as socio-independent or balanced-middle LPC leaders. Rather than representing an ambiguous “error zone,” psychometric investigations (e.g., Kennedy, 1982) indicate that middle-LPC individuals are less emotionally invested in extreme task or extreme relational orientations. They tend to be pragmatic, self-directed, and emotionally resilient, focusing on self-actualization, professional autonomy, and balanced group functioning without experiencing the intense anxieties that characterize extreme scorers when either task or social domains falter.

6. Theoretical Framework

The LPC scale cannot be understood in isolation from Fiedler’s Contingency Model of Leadership Effectiveness, which historically broke the monolithic “one best way” paradigm that dominated mid-20th-century management theory. During the 1940s and 1950s, the field was deadlocked between the Ohio State Leadership Studies (which promoted high initiating structure combined with high consideration) and the University of Michigan surveys (which promoted employee-centered over production-centered management). Fiedler challenged these universalist assumptions by arguing that leadership effectiveness is fundamentally contingent upon the interaction between the leader’s personality (measured by the LPC) and the degree of situational favorability (or situational control).

Effectiveness = f (Leader Style × Situational Favorability)

The Dimensions of Situational Favorability

Fiedler defined situational favorability—the degree to which the situation provides the leader with the power, certainty, and influence necessary to direct group activities—through three diagnostic dimensions, arrayed in a descending hierarchy of importance:

1. Leader-Member Relations: The quality of interpersonal trust, mutual respect, loyalty, and affective climate between the leader and subordinates. This is the single most critical determinant of situational control (Good vs. Poor).
2. Task Structure: The degree to which work assignments are clearly articulated, standardized, routine, and verifiable through objective metrics versus ambiguous, open-ended, and unstructured (Structured vs. Unstructured).
3. Position Power: The formal authority vested in the leader’s institutional office to reward, sanction, hire, fire, and promote team members (Strong vs. Weak).

The Eight Octants of the Contingency Model

By cross-classifying these three binary variables, Fiedler generated an eight-cell matrix, historically termed the Eight Octants of Situational Favorability, ranging from Octant I (maximally favorable: Good relations, Structured task, Strong power) down to Octant VIII (maximally unfavorable: Poor relations, Unstructured task, Weak power). Across hundreds of laboratory simulations and field studies, a distinct curvilinear pattern emerged:

• Low-LPC Leaders Perform Best in Extreme Situations: Low-LPC (task-oriented) leaders attain superior group productivity in highly favorable conditions (Octants I, II, and III) and highly unfavorable conditions (Octant VIII). Under high favorability, the group is ready to be directed, and the low-LPC leader’s focus drives execution without relational friction. Under extreme unfavorability, the leader’s aggressive, unilateral focus on task survival prevents complete organizational collapse.
• High-LPC Leaders Perform Best in Intermediate Situations: High-LPC (relationship-oriented) leaders achieve peak group performance in situations of moderate favorability (Octants IV, V, VI, and VII). In these ambiguous, friction-filled environments—where tasks may be ill-defined or leader-member friction exists—the high-LPC leader’s diplomatic, socio-emotional sensitivity fosters psychological safety, rebuilds morale, and negotiates consensus, enabling the group to function effectively.

Foundational Assumptions

Fiedler’s contingency framework rests on three radical psychometric and behavioral assumptions: first, that adult leadership personality (as indexed by LPC) is remarkably stable and resistant to short-term modification; second, that no single leadership style is universally effective or ineffective; and third, that organizational performance is maximized not by attempting to retrain leaders’ fundamental personalities, but by engineering the situational dimensions (job design, authority allocation, communication pathways) to match the leader’s intrinsic LPC orientation.

7. Validity

The Least Preferred Coworker scale has been scrutinized through one of the most comprehensive validation programs in the history of organizational psychology. Because the instrument uses an unusual indirect measurement strategy, establishing its construct, convergent, discriminant, and predictive validity required decades of empirical research.

Construct and Convergent Validity

In a definitive meta-analytic review of the LPC literature, Robert W. Rice (1978) synthesized over two decades of empirical investigations encompassing dozens of independent samples. Rice demonstrated that LPC scores correlate consistently and significantly with established measures of interpersonal values, cognitive differentiation, and behavioral tendencies:

• Attributional Complexity: High-LPC individuals consistently score higher on psychometric indices of cognitive complexity, such as Bieri’s index of cognitive differentiation and Crockett’s Role Category Questionnaire (RCQ). They process interpersonal information multidimensionally rather than unidimensionally.
• Interpersonal Values: High-LPC scores correlate positively with the Consideration scale of the Leader Behavior Description Questionnaire (LBDQ; r values typically between .35 and .52), as well as measures of empathy, socio-emotional sensitivity, and affiliation motivation.
• Task Dominance: Low-LPC scores correlate reliably with Initiating Structure on the LBDQ, measures of achievement motivation (nAch), and self-reported task-focused assertiveness.

Discriminant Validity

Crucially, the LPC scale has demonstrated adequate discriminant validity from general cognitive ability (IQ) and simple response biases:

• Intelligence: Correlations between LPC scores and standard intelligence tests (e.g., Wonderlic Personnel Test, WAIS subscales) are consistently non-significant, with r values fluctuating between -.08 and .06, establishing that LPC does not reflect verbal or analytical intelligence.
• Social Desirability: Correlations with the Marlowe-Crowne Social Desirability Scale and the Edwards Social Desirability Scale are typically negligible (r < .12), confirming that the indirect semantic differential format successfully prevents respondents from simply painting themselves in a socially sanctioned light.

Predictive and Criterion-Related Validity

The ultimate criterion for the LPC scale within Fiedler’s paradigm is not whether LPC directly correlates with performance (a main effect is rarely predicted), but whether the LPC × Situation interaction predicts group effectiveness. In a landmark meta-analysis, Strube and Garcia (1981) examined 145 independent studies evaluating Fiedler’s contingency model. Their findings robustly supported the predictive validity of the LPC classification across diverse ecologies:

• In Octants I, II, III, and VIII, low-LPC leaders achieved significantly higher group productivity than high-LPC leaders, with mean effect sizes (converted to r) ranging from -.31 to -.48.
• In Octants IV, V, and VII, high-LPC leaders significantly outperformed low-LPC leaders, yielding positive correlation coefficients ranging from .24 to .42.
• Subsequent meta-analyses by Peters, Hartke, and Pohlmann (1985) confirmed that while field studies exhibited greater variance and noise than controlled laboratory settings, the overall interaction predicted by the LPC Contingency Model was statistically significant and robust across diverse organizational environments.

8. Reliability

The psychometric integrity of the LPC scale has been rigorously evaluated across internal consistency, split-half reliability, and test-retest stability indices.

Internal Consistency and Split-Half Reliability

Because the semantic differential items all measure a single underlying affective-cognitive appraisal of a target person, the instrument exhibits high internal consistency. Fiedler (1967) reported split-half reliability coefficients (corrected via the Spearman-Brown prophecy formula) ranging from .86 to .92 across multiple large-scale adult samples totaling over 2,000 subjects. In subsequent psychometric evaluations using Cronbach’s coefficient alpha, researchers (e.g., Rice, 1978; Chemers & Skrzypek, 1972) have consistently observed alpha values ranging between .88 and .94 for the standardized 15-item and 18-item versions.

Test-Retest Reliability and Temporal Stability

Because Fiedler conceptualized leadership style as a stable personality disposition, temporal stability is critical. Longitudinal evaluations across various time horizons have demonstrated:

• Short-Term Stability (2 to 6 weeks): Test-retest reliability coefficients fall within the range of .75 to .84, indicating high short-term measurement stability.
• Intermediate Stability (3 to 12 months): Test-retest coefficients remain stable between .67 and .81 in military cadets, corporate executives, and university student cohorts.
• Long-Term Stability (over several years): Fiedler and Garcia (1987) reported longitudinal test-retest correlations hovering around .55 to .65 across multi-year intervals, demonstrating stability comparable to standard personality dimensions measured by instruments such as the NEO-PI-R or the Myers-Briggs Type Indicator over similar spans.

Variations in test-retest reliability typically stem not from scale instability, but from shifts in the mental target chosen by the respondent—such as encountering a new, exceptionally difficult colleague whose behavior re-anchors the participant’s cognitive benchmark of a “least preferred coworker.”

9. Factor Analysis

Throughout the multi-decade psychometric evolution of the LPC, exploratory factor analyses (EFA) and confirmatory factor analyses (CFA) have been conducted to determine whether the instrument measures a unidimensional construct or comprises distinct sub-facets.

Early Exploratory Factor Solutions

Fiedler’s early factor analytic studies (1967) revealed that the bipolar adjective pairs loaded heavily on a dominant, overarching general factor accounting for 50% to 65% of the total variance. This primary factor was labeled the General Affective / Evaluative Dimension, closely matching the classic “Evaluation” factor identified in Osgood, Suci, and Tannenbaum’s (1957) pioneering research on the semantic differential technique. Adjective pairs such as Pleasant–Unpleasant, Friendly–Unfriendly, and Warm–Cold demonstrated primary loadings exceeding .70 on this dominant evaluative factor.

Multidimensional Models and Sub-Factors

When researchers rotated multiple factors using orthogonal (Varimax) and oblique (Promax) criteria, a consistent two-factor structure repeatedly emerged across independent samples (Rice, 1978; Shiflett, 1973; Weiss, 1977):

• Factor 1: Socio-Emotional Evaluation (Person-Orientation): Capturing approximately 35%–42% of the common variance, this dimension includes items reflecting interpersonal warmth, acceptance, and social pleasantness. High-loading pairs include:
  • Friendly – Unfriendly (loading: .81)
  • Warm – Cold (loading: .79)
  • Accepting – Rejecting (loading: .75)
  • Supportive – Hostile (loading: .72)
  • Harmonious – Quarrelsome (loading: .68)
• Factor 2: Task Competence / Efficiency (Work-Orientation): Accounting for 15%–22% of the common variance, this dimension groups adjectives reflecting technical efficacy, operational reliability, and goal accomplishment. High-loading pairs include:
  • Efficient – Inefficient (loading: .84)
  • Helpful – Frustrating (loading: .76)
  • Cooperative – Uncooperative (loading: .71)
  • Self-Assured – Hesitant (loading: .64)

Confirmatory Factor Analysis and Structural Fit

Modern structural equation modeling and confirmatory factor analysis (CFA) confirm that while a bifactor model—featuring a broad, overarching Evaluative Disposition factor alongside two correlated group factors (Socio-Emotional Warmth and Task Capability)—provides a statistically superior fit to the data (χ²/df < 2.5, CFI > .94, RMSEA < .06), the two sub-factors correlate so strongly (typically r = .60 to .75) that summing all items into a single, composite LPC score remains psychometrically sound and practically robust.

10. Instrument / Measurement Tool

• Instrument Name: Least Preferred Coworker Scale (LPC)
• Original Author: Fred E. Fiedler (1967)
• Primary Instrument Class: Indirect / Projective Semantic Differential Scale; Trait Leadership Measure
• Standard Item Count: 15 bipolar adjective pairs (authentic standardized version)
• Administration Format: Paper-and-pencil questionnaire or computerized self-report assessment
• Target Respondent: Adult employees, supervisors, managers, military personnel, and leaders across diverse sectors
• Completion Duration: Approximately 5 to 10 minutes
• Response Anchor: 8-point bipolar semantic differential scale (ranging from 1 to 8 between polar opposite adjectives)
• Scoring Protocol and Directionality:
  • Each of the 15 bipolar items is scored on an 8-point continuum from 1 to 8.
  • The most favorable / positive adjective receives a score of 8.
  • The most unfavorable / negative adjective receives a score of 1.
  • Items where the favorable adjective is placed on the left side (Items 1, 2, 4, 9, 10, 12, 13, 15) are scored directly from 8 (leftmost) to 1 (rightmost).
  • Items where the unfavorable adjective is placed on the left side (Items 3, 5, 6, 7, 8, 11, 14) are reverse-coded such that the favorable rightmost pole receives 8 and the unfavorable leftmost pole receives 1.
  • The individual’s total LPC score is the direct arithmetic sum of all 15 item ratings, yielding a theoretical score range from 15 to 120.
• Normative Cutoff Scores:
  • Low LPC (≤ 63): Task-Oriented Leadership Style. The respondent strongly rejects their least preferred coworker across personal and professional characteristics.
  • Middle LPC (64 – 72): Socio-Independent / Balanced Style. The respondent displays a moderate, independent orientation, neither excessively task-driven nor overly interpersonally dependent.
  • High LPC (≥ 73): Relationship-Oriented Leadership Style. The respondent maintains a favorable personal evaluation of the coworker despite acknowledging task difficulties.

11. Permissions & Fee and Test Year

The Least Preferred Coworker scale was formally introduced in 1967 in Fred E. Fiedler’s text A Theory of Leadership Effectiveness, published by McGraw-Hill Book Company, with refined operational variants appearing in subsequent treatises (Fiedler & Chemers, 1984; Fiedler & Garcia, 1987).

Because the scale was developed under federally funded research grants (including support from the Office of Naval Research and the National Institute of Mental Health) and subsequently published broadly across academic monographs and journals without proprietary digital copyright locks, the core 15-item semantic differential scale is widely considered to reside in the public academic domain for non-commercial research and educational applications. Academic researchers, university faculty, doctoral candidates, and students may utilize, administer, and reproduce the LPC items without paying licensing fees, provided that standard academic attribution and APA-format citations are given to Fred E. Fiedler and his publishing houses.

Commercial consulting applications, proprietary corporate training packages (such as official commercial derivations of the Leader Match program), and copyrighted interpretive manuals published by John Wiley & Sons or commercial test distributors may require formal permissions or purchase of assessment materials from the respective corporate copyright holders.

12. References

Ashour, A. S. (1973). The contingency model of leadership effectiveness: An evaluation. Organizational Behavior and Human Performance, 9(3), 339–355. https://doi.org/10.1016/0030-5073(73)90057-0

Chemers, M. M., & Skrzypek, G. J. (1972). Experimental test of the contingency model of leadership effectiveness. Journal of Personality and Social Psychology, 24(2), 172–177. https://doi.org/10.1037/h0033367

Fiedler, F. E. (1967). A theory of leadership effectiveness. McGraw-Hill.

Fiedler, F. E., & Chemers, M. M. (1984). Improving leadership effectiveness: The Leader Match concept (2nd ed.). John Wiley & Sons.

Fiedler, F. E., & Garcia, J. E. (1987). New approaches to effective leadership: Cognitive resources and organizational performance. John Wiley & Sons.

Graen, G., Orris, J. B., & Alvares, K. M. (1971). Contingency model of leadership effectiveness: Some experimental results. Journal of Applied Psychology, 55(3), 196–201. https://doi.org/10.1037/h0031024

Kennedy, J. K. (1982). Middle LPC leaders and the contingency model of leadership effectiveness. Organizational Behavior and Human Performance, 30(1), 1–14. https://doi.org/10.1016/0030-5073(82)90231-5

Osgood, C. E., Suci, G. J., & Tannenbaum, P. H. (1957). The measurement of meaning. University of Illinois Press.

Peters, L. H., Hartke, D. D., & Pohlmann, J. T. (1985). Fiedler’s contingency theory of leadership: An application of the meta-analysis procedures of Schmidt and Hunter. Psychological Bulletin, 97(2), 274–285. https://doi.org/10.1037/0033-2909.97.2.274

Rice, R. W. (1978). Construct validity of the Least Preferred Coworker score, the LPC: An integrative review. Psychological Bulletin, 85(6), 1199–1237. https://doi.org/10.1037/0033-2909.85.6.1199

Schriesheim, C. A., & Kerr, S. (1977). Theories and measures of leadership: A critical appraisal of current and future directions. In J. G. Hunt & L. L. Larson (Eds.), Leadership: The cutting edge (pp. 9–45). Southern Illinois University Press.

Strube, M. J., & Garcia, J. E. (1981). A meta-analytic investigation of Fiedler’s contingency model of leadership effectiveness. Psychological Bulletin, 90(2), 307–321. https://doi.org/10.1037/0033-2909.90.2.307

Vecchio, R. P. (1977). An empirical examination of the validity of Fiedler’s model of leadership effectiveness. Organizational Behavior and Human Performance, 19(1), 180–206. https://doi.org/10.1016/0030-5073(77)90061-4

13. Items of the Scale (Questionnaire)