Rotter’s Locus of Control Scale (IE Scale)

1. Abstract

The Rotter Internal-External Locus of Control Scale (commonly designated as the I-E Scale) is one of the most historically transformative psychometric instruments developed within personality psychology and social learning theory. Formulated by Julian B. Rotter in 1966, the scale operationalizes the construct of generalized expectancies regarding reinforcement contingencies—specifically assessing the degree to which individuals attribute outcomes, rewards, and life events to internal factors (such as personal effort, competence, and deliberate decision-making) versus external factors (such as chance, luck, fate, supernatural determinism, or the arbitrary actions of powerful others). Comprising 29 forced-choice dyadic items, the instrument embeds 23 diagnostically scored pairs alongside six non-scored filler items designed to obfuscate the scale’s true assessment objective and mitigate demand characteristics or social desirability response sets.

Psychometrically, the I-E Scale has demonstrated moderate-to-high internal consistency across diverse adult and collegiate populations, with Kuder-Richardson Formula 20 (KR-20) and split-half reliability coefficients typically ranging from .65 to .79, and test-retest reliability estimates spanning .49 to .83 depending upon retest intervals. Although originally conceptualized as an omnibus, unidimensional continuum ranging from extreme internality (score of 0) to extreme externality (score of 23), extensive exploratory and confirmatory factor analyses over five decades have highlighted an underlying multidimensional architecture, consistently identifying sub-factors representing personal agency (internal control over personal life trajectories) and socio-political control (beliefs regarding systemic societal influence). The scale continues to serve as an indispensable foundational measure across health psychology, organizational behavior, behavioral economics, educational assessment, and psychopathology.

2. Keywords

Locus of Control, Julian B. Rotter, Internal-External Scale, Social Learning Theory, Generalized Expectancies, Reinforcement Contingencies, Psychometrics, Forced-Choice Format, Personal Agency, Fatalism, Construct Validity, Factor Structure

3. Authors

The scale was conceived, refined, and validated by Julian B. Rotter (October 22, 1916 – January 6, 2014), an American psychologist recognized as one of the primary architects of modern cognitive-behavioral paradigms in social learning theory.

• Primary Investigator: Julian B. Rotter, Ph.D.
• Institutional Affiliation during Scale Conception: Department of Psychology, The Ohio State University, Columbus, Ohio, United States.
• Subsequent Institutional Affiliation: Department of Psychology, University of Connecticut, Storrs, Connecticut, United States (where Rotter served as Professor of Psychology and Director of Clinical Psychology Training until his retirement in 1987).
• Key Contributors & Historical Context: Rotter’s work built directly upon preliminary doctoral and post-doctoral inquiries conducted by his students and colleagues at Ohio State, including E. Jerry Phares (1955, 1957) and William H. James (1957), who initially developed rudimentary scales measuring generalized expectancies of reinforcement under chance versus skill conditions.

4. Purpose

The primary purpose of the Rotter I-E Scale is the systematic assessment of an individual’s generalized expectancy regarding the causal relationship between their own behavioral repertoire and the subsequent administration or withholding of reinforcements. In Rotter’s formulation, individuals develop generalized cognitive heuristics across life domains regarding whether their actions functionally determine their outcomes or whether life trajectories are predominantly mediated by forces beyond their immediate volition.

Theoretical Rationale

Rotter posited that in ambiguous, novel, or unstructured situations where specific behavioral history is absent, individuals rely upon cross-situational, generalized expectancies to forecast the likelihood of reinforcement. If a person operates under an internal locus of control, they conceptualize rewards as contingent upon their own skill, diligence, perseverance, and strategic foresight. Conversely, if an individual operates under an external locus of control, reinforcements are perceived as contingent upon exogenous factors such as luck, serendipity, astrological fate, systemic bias, or the unconstrained authority of powerful figures. The I-E Scale was constructed not as a measure of dynamic situational perception, but as a broad personality variable capable of predicting behavioral trends across disparate domains.

Research Applications

Over more than fifty years of continuous empirical deployment, the I-E Scale has demonstrated utility across several fundamental research domains:

• Health Psychology and Behavioral Medicine: Investigating health-promoting actions, compliance with therapeutic regimens, substance cessation, and chronic disease adaptation. Research indicates that internal individuals engage in significantly higher rates of preventative health behaviors (e.g., diet modification, cardiovascular exercise, screening participation) due to the operative belief that physical well-being is self-directed.
• Organizational Psychology and Occupational Performance: Examining occupational motivation, leadership emergence, job satisfaction, burn-out resilience, and vocational mobility. Internals consistently demonstrate higher proactive problem-solving, vocational adaptability, and occupational persistence.
• Educational and Academic Psychology: Predicting academic attainment, metacognitive study strategies, intellectual risk-taking, and reactions to academic failure. Internal students routinely attribute poor grades to inadequate preparation rather than subjective teacher bias, leading to constructive remediating efforts.
• Economic and Consumer Behavior: Analyzing financial planning, retirement savings horizons, high-involvement consumer research, and susceptibility to marketing persuasion or social proof tactics.

Clinical Applications

Clinically, the I-E Scale assists practitioners in identifying cognitive vulnerabilities that underpin psychological distress. Extreme external orientations frequently co-occur with phenomena such as learned helplessness, major depressive disorders, generalized anxiety, and demoralization. When clients perceive that life outcomes occur wholly independently of their personal initiatives, depressive passivity and therapeutic non-adherence can manifest. Cognitive-behavioral interventions often utilize baseline I-E evaluations to track the reconstruction of personal agency, restructuring externalized fatalistic cognitions into empowered, realistic attributions of self-directed efficacy.

5. Psychological Construct

The construct measured by the I-E Scale is Locus of Control of Reinforcement. It is essential to distinguish this construct from related psychological concepts to understand its theoretical boundaries:

Distinction from Self-Efficacy and Attribution Theory

While often conflated with Albert Bandura’s construct of self-efficacy and Bernard Weiner’s attribution theory, locus of control maintains distinct conceptual boundaries:

• Locus of Control vs. Self-Efficacy: Self-efficacy refers to an individual’s conviction that they can successfully execute the specific behavior required to produce a given outcome (“Can I perform this task?”). Locus of control refers to the generalized belief regarding whether the outcome, once executed, is actually contingent upon human behavior at all (“If I perform this task, will it affect the outcome, or does fate govern the outcome?”).
• Locus of Control vs. Attributional Style: Attribution theory typically examines post-hoc retrospective explanations of past events (assessing causal stability, locus, and controllability in retrospect). In contrast, locus of control represents an ante-hoc prospective generalized expectancy about future reinforcement contingencies.

The Two Poles of the Construct

The I-E Scale establishes a continuum between two divergent cognitive modalities:

1. Internal Locus of Control (Internality)

Individuals scoring toward the internal pole hold a stable expectancy that positive and negative reinforcements are the immediate functional correlates of their personal attributes, decisions, and investments of energy. Prototypical characteristics include:

• Proactive Information Processing: Internals actively gather, evaluate, and synthesize environmental data before reaching decisions, exhibiting vigilance toward cues that facilitate goal attainment.
• Autonomy and Resistance to Undue Influence: Internals demonstrate lower conformity to peer pressure, display skepticism toward authoritarian edicts, and evaluate persuasive appeals on their empirical merits rather than the perceived authority of the communicator.
• Stress Coping and Active Problem Solving: Faced with systemic stressors, internal individuals predominantly utilize problem-focused coping mechanisms rather than emotion-focused palliative avoidance or cognitive denial.

2. External Locus of Control (Externality)

Individuals scoring toward the external pole operate under the generalized belief that reinforcements are detached from personal volition. Subsequent theorists (most notably Hanna Levenson) demonstrated that externality encompasses heterogeneous underlying beliefs:

• Chance/Fatalistic Externality: Belief that the universe is governed by random chaos, bad luck, good fortune, or predetermined destiny. Outcomes are seen as arbitrary coin-tosses that defy strategic planning.
• Powerful Others Externality: Belief that the social hierarchy, administrative systems, or elite power structures unilaterally direct individual outcomes. Reinforcements depend entirely on pleasing, appeasing, or circumventing powerful external figures.
• Defensive Externality: A functional defensive adaptation wherein an individual utilizes external attributions as an ego-protective buffer to preserve self-esteem in the wake of anticipated failure or traumatic invalidation.

6. Theoretical Framework

The I-E Scale is rooted in Julian Rotter’s Social Learning Theory (1954), which integrates behavioral stimulus-response mechanisms with cognitive mediation. Rotter rejected strict drive-reduction formulations of behaviorism and proposed that human behavior in complex social settings is guided by the continuous cognitive evaluation of anticipated outcomes.

The Core Formula of Behavior Potential

Rotter encapsulated the primary determinants of human action through the following foundational predictive formula:

BP_{x, s1, Ra} = f(E_{x, Ra, s1} & RV_{a, s1})

Where:

• BP (Behavior Potential): The probability that an individual will engage in a specific behavior (x) in a particular psychological situation (s1) relative to a specific reinforcement (R_a).
• E (Expectancy): The subjective probability held by the individual that the specific reinforcement (R_a) will occur following the execution of behavior x in situation s1.
• RV (Reinforcement Value): The degree of preference for that specific reinforcement (R_a) over alternative potential reinforcements, assuming all expectancies are equal.

Generalized Expectancies vs. Specific Expectancies

As individuals accrue behavioral experiences across diverse environmental settings, their expectancies become differentiated into two distinct strata:

1. Specific Expectancies (E'): Highly contextualized predictions formulated through repeated, direct interactions within a specific, well-defined environment (e.g., an individual’s expectation of scoring a goal during a localized practice against a familiar peer).
2. Generalized Expectancies (GE): Cognitive abstractions synthesized across diverse, historical reinforcement histories. When placed in unfamiliar, ambiguous, or novel social environments where specific behavioral benchmarks are absent, individuals rely on generalized expectancies to govern their behavioral choices.

Rotter expressed the combined expectancy equation as:

E_s1 = f(E'_s1 & GE / N_s1)

Where N_s1 denotes the total amount of prior experience within that specific situation. As an individual gains extensive, direct experience within situation s1, the contribution of the generalized expectancy (GE) decreases, and behavior is predominantly governed by the specific expectancy (E'_s1). Conversely, in novel, complex, or rapidly changing life circumstances, the generalized expectancy (such as locus of control) exerts substantial influence on behavior.

7. Validity

The Rotter I-E Scale has undergone extensive empirical evaluation across diverse psychometric dimensions, demonstrating consistent construct, convergent, discriminant, and criterion-related predictive validity across adult and clinical populations.

Construct Validity

Rotter (1966) provided initial construct validation by comparing groups known to experience differential real-world environmental contingencies. Prisoners and minority populations facing significant institutional oppression scored substantially more external on the I-E Scale than socioeconomically advantaged college samples, accurately reflecting their objective lack of societal control. Furthermore, experimentally induced cognitive sets (e.g., instructing participants that a laboratory perceptual task was determined entirely by “skill” versus “pure chance”) produced dramatic shifts in response persistence and behavioral extinction among internals, confirming that the construct accurately indexes sensitivity to actual contingency structures.

Convergent Validity

The I-E Scale exhibits robust convergent validity across numerous conceptually affiliated scales:

• Levenson’s IPC Scales: The I-E Scale correlates strongly with the Chance scale (r = .50 to .62) and the Powerful Others scale (r = .42 to .55), while demonstrating moderate inverse correlations with the Internal scale (r = -.35 to -.48).
• Nowicki-Strickland Locus of Control Scale: Demonstrates substantial convergent validity with adult versions of the Nowicki-Strickland measure, yielding intercorrelations typically ranging from r = .58 to .68.
• Learned Helplessness Paradigms: External scores on the I-E Scale correlate positively with measures of learned helplessness, cognitive surrender, and depressive attributions (r = .38 to .52).
• General Self-Efficacy: Inverse correlations between Rotter’s external score and Bandura-derived generalized self-efficacy scales routinely hover between r = -.34 and -.51.

Discriminant Validity

To establish discriminant validity, Rotter meticulously correlated the I-E Scale against standardized intelligence measures and indices of social desirability:

• Intellectual Aptitude: Correlations between the I-E Scale and intelligence metrics (e.g., Scholastic Aptitude Test scores, Wonderlic Personnel Test, Wechsler Adult Intelligence Scale performance) are consistently negligible to weak (r = -.06 to -.14), demonstrating that locus of control is functionally independent of general cognitive ability.
• Social Desirability: Rotter’s utilization of a forced-choice paired format specifically sought to minimize correlations with social desirability. Initial correlations with the Marlowe-Crowne Social Desirability Scale ranged between r = -.07 and -.35 (mean reported across samples: -.21). While not zero, these indices demonstrate that social desirability accounts for less than 10% of total score variance.

Predictive and Criterion Validity

The scale’s predictive validity across naturalistic and laboratory paradigms is well-documented:

• Preventative Health: In medical adherence research, internals are significantly more likely to follow renal diet requirements, monitor blood glucose levels, cease tobacco use following medical counseling, and wear seatbelts (e.g., Wallston & Wallston, 1978).
• Information Acquisition: Internals systematically spend more time researching disease etiology, studying organizational promotion criteria, and evaluating detailed loan terms before making financial commitments (Phares, 1976).
• Social and Political Activism: During the Civil Rights movement, Gore and Rotter (1963) demonstrated that Black college students who engaged in active freedom rides and campus sit-ins possessed significantly higher internal scores than peers who limited their participation to passive attendance at rallies.

8. Reliability

The reliability of the Rotter I-E Scale has been assessed across numerous populations, academic environments, and clinical cohorts.

Internal Consistency

Given that the I-E Scale uses a forced-choice format composed of broad, heterogeneous items spanning disparate behavioral domains (including educational grading, civic governance, athletic competence, personal affection, and global political conflict), its internal consistency is generally moderate rather than exceptionally high:

• Kuder-Richardson Formula 20 (KR-20): Rotter (1966) reported KR-20 reliability coefficients ranging between .65 and .79 across multiple collegiate and adult cohorts (e.g., college females = .70; college males = .69; national stratified adult sample = .73).
• Split-Half Reliability: Spearman-Brown corrected split-half coefficients generally match the KR-20 metrics, hovering between .65 and .76. Harrow and Ferrante (1969) reported a split-half reliability of .75 within psychiatric inpatient populations.
• Contemporary Cronbach’s Alpha: When scored continuously, contemporary evaluations generally yield Cronbach’s alpha values between .67 and .74, reflecting the intended broad heterogeneity of the underlying item content.

Test-Retest Reliability

Test-retest reliability evaluations demonstrate relative temporal stability across moderate intervals, while also reflecting sensitivity to sustained environmental transitions:

• One-Month Retest Interval: Rotter (1966) documented a one-month test-retest correlation coefficient of r = .72 in a sample of college undergraduates (N = 60).
• Two-Month Retest Interval: Harrow and Ferrante (1969) observed a retest reliability coefficient of r = .55 over a two-month hospitalization period among psychiatric patients, reflecting therapeutic shifts toward personal agency.
• Long-Term Stability (1 to 2 Years): Extended longitudinal retesting over multi-year periods typically reveals coefficients between r = .49 and .61, indicating that while generalized expectancies maintain underlying trait-like stability, they remain open to gradual modification by major life transitions and cumulative life events.

9. Factor Analysis

Although Rotter originally constructed the I-E Scale under the theoretical assumption of a single, broad, unidimensional continuum, half a century of exploratory (EFA) and confirmatory factor analyses (CFA) have demonstrated that the 23 scored items reflect a multidimensional factor structure.

The Mirels Two-Factor Solution (1970)

In a seminal psychometric deconstruction, Mirels (1970) submitted the 23 scored items to principal components analysis with varimax rotation among 316 university students, uncovering a robust two-factor structure that has been widely replicated:

• Factor 1: Personal Mastery / Belief in Personal Control (Items 4, 6, 9, 10, 11, 13, 15, 16, 18, 23, 25, 28):
  
  This factor reflects an individual's direct perception of their ability to control personal life outcomes, academic attainments, occupational trajectory, and interpersonal relationships through their own labor and skill. Typical factor loadings for this dimension range from .35 to .65.
• Factor 2: Socio-Political Control / System Control (Items 3, 12, 17, 22, 29):
  
  This factor captures beliefs regarding whether the ordinary citizen can influence governmental institutions, war, systemic corruption, and macroscopic public affairs. Items in this factor focus explicitly on sociopolitical forces. Typical factor loadings span .40 to .71.

Subsequent Factor Analyses and CFA Confirmations

Subsequent psychometric investigations have extended and clarified this factor structure:

• Gurin, Gurin, Lao, and Beattie (1969): Identified a three-factor solution when assessing marginalized and racially diverse samples, distinguishing between personal control (“I have control over my life”), ideological control (“People in society get what they work for”), and system modifiability (“The political system is open to change”).
• Cherlin and Bourque (1974): Confirmed three stable dimensions: Personal Luck/Fate, System Control, and Political Influence.
• Contemporary Confirmatory Factor Analysis (CFA): Modern structural equation modeling consistently confirms that a two-factor correlated model (Personal Control and Socio-Political Control) or a bifactor model (a general locus of control factor accompanied by distinct Personal and Socio-Political group factors) exhibits superior model fit compared to the original unidimensional model. Typical fit indices for the two-factor specification include:

10. Instrument / Measurement Tool

The Rotter Internal-External Locus of Control Scale is organized as follows:

• Test Type: Self-administered psychometric questionnaire measuring generalized expectancies of reinforcement.
• Item Format: Forced-choice paired comparison (respondents select either statement ‘a’ or statement ‘b’ for each pair).
• Item Composition: 29 total paired items:
  • 23 Scored Items: Items 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, 16, 17, 18, 20, 21, 22, 23, 25, 26, 28, and 29.
  • 6 Non-Scored Filler Items: Items 1, 8, 14, 19, 24, and 27. These are explicitly included to disguise the assessment objective and mitigate demand characteristics.
• Administration Time: Typically requires 10 to 15 minutes to complete.
• Target Population: Adolescents (ages 14+) and adults possessing a minimum of an 8th-grade reading comprehension level.
• Scoring Protocol & Key:
  • Score is computed by awarding one point (+1) for each external alternative selected by the respondent.
  • No points (0 points) are awarded when the internal alternative is selected.
  • Filler items (1, 8, 14, 19, 24, 27) are completely excluded from scoring.
  • External Alternatives Scored: 2.a, 3.b, 4.b, 5.b, 6.a, 7.a, 9.a, 10.b, 11.b, 12.b, 13.b, 15.b, 16.a, 17.a, 18.a, 20.a, 21.a, 22.b, 23.a, 25.a, 26.b, 28.b, 29.a.
• Score Range and Interpretation:
  • Total Score Range: 0 to 23. Higher scores indicate an external locus of control; lower scores indicate an internal locus of control.
  • 0 to 4 (Extreme Internal Locus of Control): Pronounced belief that personal actions, diligence, and competence dictate all life outcomes. Potential vulnerability to unwarranted self-blame or guilt when confronting uncontrollable systemic failures.
  • 5 to 8 (Moderate Internal Locus of Control): Adaptive belief in personal agency, balanced by realistic recognition of external constraints. Associated with proactive coping and psychological well-being.
  • 9 to 12 (Intermediate / Balanced Locus of Control): Balanced attributional style; recognizes situational variance and views success as a combination of personal effort and favorable circumstances.
  • 13 to 16 (Moderate External Locus of Control): General tendency to attribute outcomes to systemic factors, luck, or powerful figures. May demonstrate reduced perseverance when confronting prolonged obstacles.
  • 17 to 23 (Extreme External Locus of Control): Pervasive fatalism; outcomes are viewed as largely disconnected from personal decisions. Correlates with passivity, learned helplessness, and elevated vulnerability to depressive demoralization.

11. Permissions & Fee and Test Year

The Rotter Internal-External Locus of Control Scale was formally introduced in 1966 through Julian B. Rotter’s seminal monograph, “Generalized expectancies for internal versus external control of reinforcement,” published in Psychological Monographs: General and Applied (Vol. 80, No. 1, Whole No. 609, pp. 1–28) by the American Psychological Association (APA).

Licensing, Fee Structure, and Usage Rights

• Academic and Non-Commercial Research: Under standard Fair Use provisions and psychological research conventions, the Rotter I-E Scale resides within the public domain for scholarly research, educational instruction, and academic non-commercial investigation. No licensing fee or royalty payments are required for academic research.
• Commercial Applications: Commercial deployments (e.g., integrating the scale into proprietary corporate pre-employment screening platforms, commercial software, or fee-for-service executive assessments) require formal copyright clearance and permission from the copyright holder, the American Psychological Association (APA).
• Ethical Requirement: Researchers and clinicians utilizing the instrument are professionally obligated to maintain assessment integrity, administer the items without unauthorized linguistic distortions, protect participant confidentiality, and ensure that interpretation is overseen by qualified psychometric professionals.

12. References

• Bandura, A. (1977). Self-efficacy: Toward a unifying theory of behavioral change. Psychological Review, 84(2), 191–215. https://doi.org/10.1037/0033-295X.84.2.191
• Cherlin, A., & Bourque, L. B. (1974). Dimensionality and reliability of the Rotter I-E scale. Sociometry, 37(4), 565–582. https://doi.org/10.2307/2786427
• Gore, P. M., & Rotter, J. B. (1963). A personality correlate of social action. Journal of Personality, 31(1), 58–64. https://doi.org/10.1111/j.1467-6494.1963.tb01839.x
• Gurin, P., Gurin, G., Lao, R. C., & Beattie, M. (1969). Internal-external control in the motivational dynamics of Negro youth. Journal of Social Issues, 25(3), 29–53. https://doi.org/10.1111/j.1540-4560.1969.tb00605.x
• Harrow, M., & Ferrante, A. (1969). Locus of control in psychiatric patients. Journal of Consulting and Clinical Psychology, 33(5), 582–589. https://doi.org/10.1037/h0028251
• James, W. H. (1957). Internal versus external control of reinforcement as a basic variable in learning theory (Unpublished doctoral dissertation). The Ohio State University, Columbus, OH.
• Joe, V. C. (1971). Review of the internal-external control construct as a personality variable. Psychological Reports, 28(2), 619–640. https://doi.org/10.2466/pr0.1971.28.2.619
• Lefcourt, H. M. (1976). Locus of control: Current trends in theory and research. Lawrence Erlbaum Associates.
• Levenson, H. (1973). Multidimensional locus of control in psychiatric patients. Journal of Consulting and Clinical Psychology, 41(3), 397–404. https://doi.org/10.1037/h0035357
• Levenson, H. (1974). Activism and powerful others: Distinctions within the concept of internal-external control. Journal of Personality Assessment, 38(4), 377–383. https://doi.org/10.1080/00223891.1974.10119988
• Mirels, H. L. (1970). Dimensions of internal versus external control. Journal of Consulting and Clinical Psychology, 34(2), 226–228. https://doi.org/10.1037/h0029005
• Phares, E. J. (1957). Expectancy changes in skill and chance situations. The Journal of Abnormal and Social Psychology, 54(3), 339–342. https://doi.org/10.1037/h0045689
• Phares, E. J. (1976). Locus of control in personality. General Learning Press.
• Rotter, J. B. (1954). Social learning and clinical psychology. Prentice-Hall. https://doi.org/10.1037/10788-000
• Rotter, J. B. (1966). Generalized expectancies for internal versus external control of reinforcement. Psychological Monographs: General and Applied, 80(1), 1–28. https://doi.org/10.1037/h0092976
• Rotter, J. B. (1975). Some problems and misconceptions related to the construct of internal versus external control of reinforcement. Journal of Consulting and Clinical Psychology, 43(1), 56–67. https://doi.org/10.1037/h0076301
• Rotter, J. B. (1990). Internal versus external control of reinforcement: A case history of a variable. American Psychologist, 45(4), 489–493. https://doi.org/10.1037/0003-066X.45.4.489
• Wallston, K. A., Wallston, B. S., & DeVellis, R. (1978). Development of the Multidimensional Health Locus of Control (MHLC) Scales. Health Education Monographs, 6(2), 160–170. https://doi.org/10.1177/109019817800600107

13. Items of the Scale (Questionnaire)