Barratt Impulsiveness Scale (BIS-11)

1. Abstract

The Barratt Impulsiveness Scale (BIS-11) is the preeminent gold-standard self-report psychometric instrument designed to assess the multidimensional construct of impulsivity across clinical, forensic, and non-clinical populations. Developed through progressive iterations spanning more than four decades by Ernest S. Barratt and refined definitively by Patton, Stanford, and Barratt in 1995, the BIS-11 operationalizes impulsivity not as a monolithic psychological phenomenon, but rather as an intricate, biologically anchored behavioral disposition characterized by rapid, unplanned reactions to internal and external stimuli without regard to negative consequences. The instrument comprises 30 self-report items administered on a 4-point Likert-type scale ranging from 1 (Rarely/Never) to 4 (Almost Always/Always).

Psychometrically, the BIS-11 demonstrates a robust hierarchical structure consisting of three overarching second-order factors: Attentional Impulsiveness (reflecting cognitive instability and task-focus deficits), Motor Impulsiveness (reflecting impetuous action and behavioral disinhibition), and Non-planning Impulsiveness (reflecting a lack of forethought, future orientation, and cognitive complexity). These three second-order dimensions are further subsumed by six correlated first-order subscales: Attention, Cognitive Instability, Motor, Perseverance, Self-Control, and Cognitive Complexity. Internal consistency estimates across diverse healthy and clinical cohorts reliably yield Cronbach’s alpha coefficients ranging between 0.79 and 0.84 for the total score, with subscale reliabilities generally falling between 0.59 and 0.74. Extensively translated into dozens of languages and validated cross-culturally, the BIS-11 possesses formidable construct, convergent, and discriminant validity, serving as an indispensable biomarker proxy and behavioral index in research concerning substance use disorders, bipolar disorder, attention-deficit/hyperactivity disorder (ADHD), suicidology, and violent forensic behavior.

2. Keywords

Barratt Impulsiveness Scale, BIS-11, impulsivity, psychometrics, motor impulsiveness, non-planning impulsiveness, attentional impulsiveness, behavioral disinhibition, executive dysfunction, self-control, factor analysis, construct validity

3. Authors

The primary authors responsible for the definitive 11th revision of the instrument are:

• Jim H. Patton, Ph.D. — Professor Emeritus of Psychology and Neuroscience, Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States. Patton played an instrumental role in conducting the comprehensive exploratory and confirmatory factor analyses that resolved long-standing psychometric anomalies present in earlier versions of the instrument.
• Matthew S. Stanford, Ph.D. — Chief Executive Officer of the Hope and Healing Center & Institute, Houston, Texas; formerly Professor of Psychology and Neuroscience at Baylor University. Dr. Stanford is an internationally recognized cognitive neuroscientist specializing in the neurobiology of impulsive aggression, traumatic brain injury, and psychopathy.
• Ernest S. Barratt, Ph.D. (1925–2003) — Legendary behavioral scientist, neuropsychiatrist, and pioneer in the psychobiology of temperament and disinhibition. At the time of the BIS-11’s development and publication, Dr. Barratt served as Professor and Vice Chair for Research in the Department of Psychiatry and Behavioral Sciences at the University of Texas Medical Branch (UTMB) at Galveston. His research from the 1950s onward established the empirical framework governing contemporary psychometric assessments of impulsive action.

4. Purpose

The primary purpose of the Barratt Impulsiveness Scale (BIS-11) is to deliver a reliable, psychometrically standardized, and multidimensional quantification of trait impulsivity. In psychological and psychiatric research, impulsivity represents an umbrella construct that captures deficits in delay of gratification, impaired behavioral restraint, failure to deliberate prior to motor execution, and attentional lability. Because excessive impulsivity is a transdiagnostic diagnostic criterion across the Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR)—manifesting in disorders such as borderline personality disorder, antisocial personality disorder, pathological gambling, impulse-control disorders, and bulimia nervosa—a precise instrument capable of fractionating impulsivity into distinct constituent mechanisms is imperative.

Clinically, the BIS-11 serves multiple diagnostic and prognostic purposes:

• Risk Stratification: Elevated scores, specifically on the Motor and Non-planning dimensions, strongly predict therapeutic non-compliance, treatment drop-out, and high relapse rates in substance abuse rehabilitation programs.
• Suicide and Self-Harm Assessment: The BIS-11 is routinely integrated into comprehensive clinical risk assessments. Impulsive traits act as a primary catalyst converting suicidal ideation into lethal suicidal gestures, especially during acute affective dysregulation.
• Forensic and Criminological Profiling: The scale enables clinicians and forensic psychologists to differentiate between premeditated (instrumental) and impulsive (reactive) violent offenses, informing both risk management assessments and judicial sentencing considerations.
• Neuropharmacological Monitoring: The scale functions as an outcome metric in clinical trials evaluating psychostimulants, mood stabilizers, and novel cognitive-enhancing agents aimed at mitigating frontal executive deficits.

In basic neurocognitive research, the BIS-11 bridges self-reported behavioral tendencies with objective neuroimaging paradigms, such as functional Magnetic Resonance Imaging (fMRI), electroencephalography (EEG event-related potentials like P300 and error-related negativity), and computer-based behavioral tasks such as the Go/No-Go task and the Stop-Signal Task. By systematically distinguishing cognitive inattention from physical motor disinhibition and strategic non-planning, the BIS-11 affords researchers an indispensable tool to unravel the neurocircuitry underlying human volitional control.

5. Psychological Construct

Impulsivity is conceptualized within the BIS-11 paradigm as a biological, multi-layered personality trait consisting of three distinct yet interrelated second-order constructs, which are further divided into six first-order components:

1. Attentional Impulsiveness

This second-order dimension assesses an individual’s capacity to focus sustained mental effort on complex tasks, resist intrusive cognitions, and maintain task vigilance. It reflects an underlying cognitive vulnerability characterized by cognitive distractibility and mental restlessness. Attentional Impulsiveness is partitioned into two first-order subscales:

• Attention: Measures the subjective ability to focus on current cognitive tasks and maintain concentration. Low scorers can concentrate easily, whereas high scorers describe an inability to pay attention or remain mentally grounded (e.g., Item 5: “I don’t pay attention”; Item 9 [reverse-scored]: “I concentrate easily”).
• Cognitive Instability: Captures thought disruption, intrusive thoughts, and perceived mental flightiness. Individuals scoring high endorse rapid, fluctuating mental sequences that disrupt coherent task engagement (e.g., Item 6: “I have racing thoughts”; Item 26: “I have outside thoughts when thinking”).

2. Motor Impulsiveness

This second-order dimension evaluates overt behavioral disinhibition—the propensity to act quickly, physically, and spontaneously without conscious forethought or consideration of situational context. This trait captures what is colloquially understood as “acting on a whim.” It comprises two first-order subscales:

• Motor: Measures direct, immediate physical actions initiated in response to immediate internal impulses or environmental stimuli (e.g., Item 2: “I do things without thinking”; Item 17: “I act on impulse”; Item 19: “I act on the spur of the moment”).
• Perseverance: Measures the behavioral commitment to persist in a given activity or stable life domain versus an impetuous tendency to abandon pursuits when faced with boredom or minor friction (e.g., Item 16: “I change jobs”; Item 21: “I change where I live”; Item 24: “I change hobbies”).

3. Non-planning Impulsiveness

This second-order dimension reflects a pervasive lack of future orientation, inadequate deliberation before initiating significant life tasks, and an absence of proactive cognitive structure. High scorers operate predominantly within the “here and now,” exhibiting indifference toward long-term consequences and retirement or financial security. It encompasses two first-order subscales:

• Self-Control: Gauges deliberate mental self-regulation, strategic restraint, and methodical execution of life routines (e.g., Item 1 [reverse-scored]: “I plan tasks carefully”; Item 8 [reverse-scored]: “I am self-controlled”; Item 13 [reverse-scored]: “I plan for job security”).
• Cognitive Complexity: Evaluates an individual’s intrinsic motivation to engage in demanding intellectual challenges, analytical puzzles, and abstract mental problem-solving. Individuals high in impulsiveness tend to avoid complex mental effort (e.g., Item 15 [reverse-scored]: “I like to think about complex problems”; Item 18: “I get easily bored when solving thought problems”; Item 29 [reverse-scored]: “I like puzzles”).

6. Theoretical Framework

The theoretical architecture of the BIS-11 is grounded in biological models of personality and neuropsychology, notably synthesizing the behavioral concepts of Hans Eysenck, Jeffrey Alan Gray, and Ernest Barratt himself. Barratt hypothesized that human temperament is shaped by fundamental biological systems regulating arousal, behavioral inhibition, and information processing.

Central to Barratt’s model is the distinction between cognitive, motor, and planning domains. Whereas early psychometric models (e.g., Eysenck’s early PEN model) conflated impulsivity with extraversion or sensation seeking, Barratt argued that impulsivity is an independent neurobiological construct dissociable from the pursuit of excitement. Instead, it reflects an organic deficit in the nervous system’s capacity to withhold responses:

• The Fronto-Striatal Dysfunction Hypothesis: Contemporary cognitive neuroscience maps the three Barratt dimensions directly onto specialized frontostriatal circuits. The Motor dimension is primarily linked to hyper-responsivity within the ventromedial prefrontal cortex (vmPFC) and the dorsal striatum, leading to premature motor execution. The Attentional dimension is tied to deficits within the dorsolateral prefrontal cortex (dlPFC) and the anterior cingulate cortex (ACC), which govern top-down attentional filtering. The Non-planning dimension reflects insufficient orbitofrontal cortex (OFC) activation during delay discounting and temporal valuation tasks.
• Gray’s Reinforcement Sensitivity Theory: Within Gray’s paradigm, the BIS-11 can be understood as an overactive Behavioral Activation System (BAS) coupled with an inefficient or hypofunctioning Behavioral Inhibition System (BIS). Individuals scoring high on the BIS-11 show high cue-reactivity to immediate primary reinforcers and fail to activate the serotonergically mediated septohippocampal brake system when potential long-term punishments loom.
• Information Processing Speed vs. Depth: Barratt’s foundational psychophysiological experiments showed that highly impulsive individuals prioritize processing speed at the absolute expense of processing accuracy. Electrophysiologically, they exhibit diminished P300 wave amplitudes during oddball detection tasks, reflecting degraded resource allocation and compromised early cortical inhibition.

7. Validity

The psychometric validity of the BIS-11 has been rigorously corroborated through hundreds of independent empirical investigations across multiple clinical and cultural contexts.

Construct and Factorial Validity

In the seminal psychometric validation study conducted by Patton, Stanford, and Barratt (1995), the scale was administered to 412 undergraduate students, 248 psychiatric inpatients, and 73 prison inmates. Principal components analysis and confirmatory factor analysis definitively established that the three second-order factors (Attentional, Motor, Non-planning) adequately accounted for common variance across both healthy and pathological samples, confirming that the construct structure remains invariant across clinical strata.

Convergent Validity

The BIS-11 demonstrates high convergent correlations with other well-established personality and clinical instruments:

• Eysenck’s Impulsiveness Questionnaire (I-7): Strong positive correlations ($r = 0.65$ to $0.78$) are routinely documented between the BIS-11 total score and the I-7 Impulsiveness subscale (Luengo et al., 1991).
• UPPS-P Impulsive Behavior Scale: The BIS-11 Motor subscale correlates robustly with UPPS-P Urgency ($r \approx 0.55$) and Lack of Premeditation ($r \approx 0.62$), whereas the Non-planning subscale aligns almost perfectly with UPPS-P Lack of Premeditation ($r = 0.68$).
• Neurocognitive Behavioral Paradigms: BIS-11 scores correlate significantly with commission errors (false alarms) in the Continuous Performance Test (CPT) and the Go/No-Go task, as well as steeper discounting curves in empirical delay discounting paradigms.

Discriminant and Known-Groups Validity

The BIS-11 excels at discriminating clinical groups characterized by poor impulse control from healthy normative controls:

• Substance Use and Addiction: Heroin, cocaine, and methamphetamine-dependent individuals reliably demonstrate BIS-11 total scores that are 1.5 to 2 standard deviations higher than matched healthy controls.
• Forensic Cohorts: Incarcerated violent offenders score substantially higher on the Motor and Non-planning subscales compared to non-violent offenders.
• Affective and Bipolar Disorders: Individuals with Bipolar I Disorder, even during sustained euthymic phases, exhibit persistent trait elevations across all three BIS-11 dimensions relative to healthy baselines, confirming its sensitivity as an endophenotypic marker.

8. Reliability

The BIS-11 possesses solid psychometric reliability across internal consistency and temporal stability metrics, as documented across diverse epidemiological studies:

Internal Consistency

• Total Score: The original validation by Patton et al. (1995) reported Cronbach’s alpha coefficients of $\alpha = 0.82$ for undergraduate students, $\alpha = 0.79$ for psychiatric inpatients, and $\alpha = 0.80$ for male prison inmates. Subsequent large-scale normative studies have consistently replicated these values, with total score alphas typically ranging between $0.80$ and $0.85$.
• Second-Order Factors: In the Patton et al. (1995) study, the internal consistencies were: Attentional Impulsiveness ($\alpha = 0.74$), Motor Impulsiveness ($\alpha = 0.59$), and Non-planning Impulsiveness ($\alpha = 0.72$). Independent psychometric investigations (such as those by Miller, 2003; Stanford et al., 2009) have yielded comparable coefficients: Motor Impulsiveness ($\alpha = 0.70$), Non-planning Impulsiveness ($\alpha = 0.72$), and Attentional Impulsiveness ($\alpha = 0.61$ to $0.74$).

Test-Retest Reliability

Temporal stability evaluations demonstrate that the BIS-11 captures stable trait characteristics rather than transient affective states. Patton and colleagues observed one-month test-retest reliability correlations ranging from $r = 0.66$ to $r = 0.83$ in non-clinical cohorts. Stanford et al. (2009) examined test-retest reliability over an extended 6-month interval in a diverse clinical cohort, reporting intraclass correlation coefficients (ICC) of $0.83$ for the total score, $0.75$ for Non-planning, $0.72$ for Motor, and $0.69$ for Attentional Impulsiveness, underscoring high temporal stability.

9. Factor Analysis

The structural elucidation of the BIS-11 represents a benchmark in classical psychometrics. Early versions (BIS-1 through BIS-10) suffered from inconsistent factor structures due to an over-reliance on small, homogeneous samples and unconstrained exploratory factor analysis (EFA). Patton, Stanford, and Barratt (1995) resolved these ambiguities by administering a 34-item experimental prototype to three independent, heterogeneous groups ($N = 733$ total participants).

Exploratory Factor Structure

Using principal component extraction followed by orthogonal (Varimax) and oblique (Promax) rotations, the authors identified six robust first-order factors with eigenvalues greater than 1.0. Four items with low factor loadings ($< 0.35$) or severe cross-loadings across divergent theoretical axes were systematically pruned, arriving at the finalized 30-item configuration.

A second-order factor analysis was then conducted on the intercorrelation matrix of the six primary factors, resolving into three distinct second-order factors accounting for over 50% of the total variance:

• Second-Order Factor 1: Attentional Impulsiveness — Subsumes the Attention first-order factor (loadings from $0.51$ to $0.73$ across items 5, 9, 11, 20, 28) and the Cognitive Instability first-order factor (loadings from $0.48$ to $0.69$ across items 6, 24, 26).
• Second-Order Factor 2: Motor Impulsiveness — Subsumes the Motor first-order factor (loadings from $0.45$ to $0.76$ across items 2, 3, 4, 17, 19, 22, 25) and the Perseverance first-order factor (loadings from $0.38$ to $0.65$ across items 16, 21, 23, 30).
• Second-Order Factor 3: Non-planning Impulsiveness — Subsumes the Self-Control first-order factor (loadings from $0.42$ to $0.74$ across items 1, 7, 8, 12, 13, 14) and the Cognitive Complexity first-order factor (loadings from $0.40$ to $0.71$ across items 10, 15, 18, 27, 29).

Confirmatory Factor Analysis (CFA)

Subsequent modern CFA studies (e.g., Fossati et al., 2001; Reise et al., 2013) have evaluated the hierarchical three-factor construct against alternative models (such as single-factor and correlated two-factor solutions). The partially hierarchical three-factor model consistently shows superior fit indices ($ ext{CFI} > 0.90$,$ ext{TLI} > 0.90$,$ ext{RMSEA} le 0.055$). While minor cross-loadings have been identified in specific sub-populations (such as Item 24 loading alternatively on motor restlessness), the overarching three-factor taxonomy remains the widely accepted structural benchmark.

10. Instrument / Measurement Tool

• Instrument Name: Barratt Impulsiveness Scale, Version 11 (BIS-11)
• Authors: Jim H. Patton, Matthew S. Stanford, and Ernest S. Barratt (1995)
• Assessment Type: Psychological Self-Report Questionnaire
• Target Population: Adolescents and adults (ages 16 and older); adapted for clinical, forensic, and non-clinical research settings
• Item Count: 30 items
• Administration Format: Paper-and-pencil, computer-assisted, or digital mobile administration
• Estimated Completion Time: 5 to 10 minutes
• Response Options: 4-point Likert scale:
  • Rarely/Never (Scored as 1)
  • Occasionally (Scored as 2)
  • Often (Scored as 3)
  • Almost Always (Scored as 4)
• Reverse-Scored Items: Items 1, 7, 8, 9, 10, 12, 13, 15, 20, 29, and 30 must be reverse-scored prior to calculating subscale and total scores (i.e., $4 = 1$, $3 = 2$, $2 = 3$, $1 = 4$).
• Scoring and Factor Allocation:
  • Attentional Impulsiveness (8 items): Sum of Attention items (5, 9*, 11, 20*, 28) and Cognitive Instability items (6, 24, 26). Possible range: 8 to 32.
  • Motor Impulsiveness (11 items): Sum of Motor items (2, 3, 4, 17, 19, 22, 25) and Perseverance items (16, 21, 23, 30*). Possible range: 11 to 44.
  • Non-planning Impulsiveness (11 items): Sum of Self-Control items (1*, 7*, 8*, 12*, 13*, 14) and Cognitive Complexity items (10*, 15*, 18, 27, 29*). Possible range: 11 to 44.
  • Total Score: Sum of all 30 items (Attentional + Motor + Non-planning). Total potential score ranges from 30 to 120. Higher scores denote elevated trait impulsivity. A total score exceeding 72 is widely utilized across empirical literature as a clinical threshold indicating elevated impulsivity.

11. Permissions & Fee and Test Year

The Barratt Impulsiveness Scale (BIS-11) was published in its definitive format in 1995. True to the pedagogical philosophy of Dr. Ernest S. Barratt, the BIS-11 was placed into the public domain for academic, non-commercial, clinical, and scientific research. No licensing fees or formal permissions are required for non-commercial academic investigations, provided the original validation study (Patton et al., 1995) is appropriately credited.

Commercial reproduction, incorporation into proprietary digital diagnostics, or monetization within corporate testing suites requires formal authorization from the copyright custodians and affiliated academic institutions (such as the University of Texas Medical Branch). Researchers are advised to retain the authentic 30 items and original response anchors without lexical modification to maintain normative benchmarking comparability.

12. References

• Barratt, E. S. (1959). Anxiety and impulsiveness related to psychomotor efficiency. Perceptual and Motor Skills, 9(3), 191–198. https://doi.org/10.2466/pms.1959.9.3.191
• Fossati, A., Di Ceglie, A., Acquarini, E., & Barratt, E. S. (2001). Psychometric properties of an Italian version of the Barratt Impulsiveness Scale-11 (BIS-11) in nonclinical subjects. Journal of Clinical Psychology, 57(6), 815–828. https://doi.org/10.1002/jclp.1051
• Luengo, M. A., Carrillo-de-la-Peña, M. T., & Otero, J. M. (1991). The components of impulsiveness: A comparison of the I.7 Impulsiveness Questionnaire and the Barratt Impulsiveness Scale. Personality and Individual Differences, 12(7), 657–667. https://doi.org/10.1016/0191-8869(91)90220-N
• Miller, E. (2003). The measurement of impulsivity (Doctoral dissertation, Coventry University and University of Warwick). British Library Electronic Theses Online Service. http://wrap.warwick.ac.uk/2900/
• Miller, E., Tudway, J., & Watson, D. (2003). Investigating the attentional-fixity theory of impulsivity (Dickman, 1993, 1996) among a UK sexual offending sample. Journal of Interpersonal Violence (submitted manuscript).
• Patton, J. H., Stanford, M. S., & Barratt, E. S. (1995). Factor structure of the Barratt Impulsiveness Scale. Journal of Clinical Psychology, 51(6), 768–774. https://doi.org/10.1037/a0032161
• Stanford, M. S., Mathias, C. W., Dougherty, D. M., Lake, S. L., Anderson, N. E., & Patton, J. H. (2009). Fifty years of the Barratt Impulsiveness Scale: An update and review. Personality and Individual Differences, 47(5), 385–395. https://doi.org/10.1016/j.paid.2009.04.008

13. Items of the Scale (Questionnaire)