Adult Impulsiveness Scale I7

Abstract

The Adult Impulsiveness Scale I7 (often termed the Eysenck Impulsiveness Questionnaire or I7) is a seminal psychometric instrument designed by Sybil B. G. Eysenck, Paul R. Pearson, Geoffrey Easting, and J. Frank Allsopp (1985) to resolve longstanding conceptual and structural ambiguities in the assessment of impulsivity. Evolving from earlier iterations within the Eysenck personality testing tradition (including the I5 and I6 questionnaires), the I7 dissociates rash, unplanned behavior from conscious thrill-seeking and interpersonal emotional sensitivity. Specifically, the instrument operationalizes three distinct, biologically and behaviorally grounded traits: Impulsiveness (acting on the spur of the moment without considering negative consequences), Venturesomeness (conscious, intentional risk-taking where danger is acknowledged and embraced for thrill or excitement), and Empathy (the capacity to vicariously experience and resonate with the affective states of others). Comprising 54 self-report items presented in an accessible dichotomous (Yes/No) response format, the I7 has demonstrated robust psychometric properties across cross-cultural, forensic, occupational, and psychiatric cohorts. Internal consistency estimates typically yield Cronbach’s alpha values ranging from .77 to .84 for Impulsiveness, .75 to .85 for Venturesomeness, and .69 to .80 for Empathy. Confirmatory factor analytic investigations consistently support its orthogonal to moderately correlated three-factor architecture, distinguishing it sharply from unidimensional conceptualizations. This comprehensive review examines the theoretical origins, psychometric validity, structural nuances, scoring algorithms, and clinical-research utilities of the I7 in modern differential psychology.

Keywords

Adult Impulsiveness Scale I7, Impulsivity, Venturesomeness, Affective Empathy, Eysenck Personality Theory, Sensation Seeking, Psychometrics, Factor Analysis, Behavioral Inhibition, Risk-Taking

Authors

The Adult Impulsiveness Scale I7 was formulated and standardized through an iterative series of psychometric studies spearheaded by prominent researchers at the Institute of Psychiatry, University of London, and associated British academic institutions:

• Sybil B. G. Eysenck, PhD: Institute of Psychiatry, King’s College London (formerly University of London), United Kingdom. Renowned differential psychologist and co-architect of the Eysenck Personality Questionnaire (EPQ) series.
• Paul R. Pearson, PhD: Department of Psychology, University of Bradford, United Kingdom. Psychometrician specializing in individual differences and structural equation modeling.
• Geoffrey Easting, PhD: Department of Education and Psychology, University of Surrey, United Kingdom. Specialist in developmental psychometrics and longitudinal normative studies.
• J. Frank Allsopp, PhD: Institute of Psychiatry, University of London, and HM Prison Service research divisions, United Kingdom. Criminological psychologist focusing on delinquent behavior, antisocial personality structures, and biological correlates of deviance.

Purpose

The primary purpose of the Adult Impulsiveness Scale I7 is to establish a psychometrically sound, conceptually refined taxonomy for distinguishing between non-deliberative, dysregulated actions and thrill-oriented, conscious risk behaviors, while concurrently evaluating social-emotional resonance. For decades, personality inventories conflated impulsivity with extraversion or sensation seeking, generating severe criterion contamination in behavioral research. Early iterations of the Eysenck Personality Inventory (EPI) and the Eysenck Personality Questionnaire (EPQ) distributed impulsivity across both Extraversion (E) and Psychoticism (P), muddling empirical inquiries into criminal conduct, substance dependence, and affective dysregulation.

By establishing the I7, Eysenck and colleagues addressed the crucial need to decouple venturesomeness (a trait akin to Marvin Zuckerman’s sensation seeking, wherein an individual is fully cognizant of the risks involved in an activity yet chooses to engage for the sake of arousal) from impulsiveness (a non-planning, spur-of-the-moment cognitive failure where risk is not weighed or is ignored entirely). The inclusion of empathy as a third dimension provided a necessary counterbalance within the biological framework of Psychoticism, as individuals characterized by elevated Psychoticism typically exhibit pronounced deficits in emotional empathy alongside heightened, non-reflective impulsiveness.

In applied contexts, the scale serves critical functions across diverse domains:

• Clinical and Psychiatric Assessment: Differentiating between disorders characterized by inhibitory failure (e.g., Attention-Deficit/Hyperactivity Disorder, Bipolar Disorder in manic phases, Borderline Personality Disorder) and those involving calculated sensation seeking (e.g., Antisocial Personality Disorder, extreme sports engagement).
• Forensic and Criminological Profiling: Evaluating recidivism risk, institutional infraction probabilities, and violent offending patterns, where true impulsiveness often predicts spontaneous outbursts while venturesomeness predicts premeditated high-stakes illicit enterprises.
• Addiction Medicine: Dissecting pathways into substance dependence, distinguishing individuals who initiate substance use due to high venturesomeness from those who persist or relapse due to high impulsiveness and executive control deficits.
• Organizational and Safety-Critical Screening: Assessing prospective personnel in aviation, military, emergency services, and high-risk industrial roles where high venturesomeness paired with low impulsiveness may be advantageous, whereas high impulsiveness poses catastrophic occupational hazards.

Psychological Construct

The Adult Impulsiveness Scale I7 operationalizes a tripartite structural model of personality, defining three distinct constructs with specific cognitive, affective, and behavioral markers:

1. Impulsiveness (Imp)

Within the I7 framework, Impulsiveness denotes an individual’s constitutional propensity to act rapidly, spontaneously, and without premeditation or cognitive reflection. Individuals scoring high on this dimension frequently report saying or doing things on the “spur of the moment,” failing to anticipate downstream consequences, and experiencing post-decisional regret. Unlike sensation seekers, impulsive individuals do not necessarily seek out danger for hedonic pleasure; rather, their actions reflect poor inhibitory control, deficient cognitive deliberation, and an inability to postpone immediate gratification. Sample behavioral manifestations include making hasty purchases, blurting out statements without evaluating their interpersonal fallout, and having difficulty adhering to long-term plans. Psychometrically, this dimension aligns closely with modern conceptualizations of “rash impulsiveness,” negative/positive urgency, and lack of perseverance.

2. Venturesomeness (Vent)

Venturesomeness reflects a deliberate, voluntary attraction to thrill, excitement, danger, and novel sensory experiences where the prospective hazards are fully recognized, calculated, and accepted. High scorers on Venturesomeness are drawn to extreme sports (e.g., parachuting, fast driving, scuba diving, mountaineering), exploratory occupations, and unconventional life choices. Crucially, venturesome individuals do not act blindly or thoughtlessly; their behavior is purposive and oriented toward hedonic arousal and stimulation. In Eysenck’s structural system, Venturesomeness correlates positively with Extraversion, representing the exploratory, sensation-seeking facet of sociability and cortical under-arousal, whereas Impulsiveness correlates primarily with Psychoticism and Neuroticism.

3. Empathy (Emp)

Empathy on the I7 represents affective or vicarious empathy—the automatic, emotional resonance with another person’s distress, joy, or vulnerability. It captures emotional contagion, sympathetic distress, and tender-mindedness (e.g., feeling sorrow for a lonely stranger, crying during sentimental cinematic scenes, or feeling strongly influenced by the emotional climate of a social group). Eysenck integrated Empathy into the I7 primarily because of its inverse relationship with Psychoticism. High Psychoticism scorers are cold, impersonal, hostile, and devoid of emotional warmth. By quantifying Empathy alongside Impulsiveness and Venturesomeness, the I7 provides a rich interpersonal context: high impulsivity combined with low empathy typifies psychopathic and aggressive profiles, whereas high impulsivity combined with high empathy often characterizes emotionally dysregulated, highly reactive, or borderline personality styles.

Theoretical Framework

The conceptual architecture of the I7 is firmly embedded within Hans J. Eysenck’s biological typology of personality, specifically the PEN model: Psychoticism (P), Extraversion (E), and Neuroticism (N).

The Historical Disentanglement of Impulsiveness

In early formulations of Eysenck’s theory (e.g., the Maudsley Personality Inventory and the early EPI), Extraversion subsumed both sociability and impulsivity. Extraverts were theorized to possess chronically under-aroused ascending reticular activating systems (ARAS), driving them to seek external stimulation through social interaction and impulsive behaviors. However, subsequent empirical critiques—most notably from Jeffrey A. Gray—demonstrated that impulsivity did not cleanly align with pure Extraversion. Gray’s Reinforcement Sensitivity Theory posited that impulsivity reflected the sensitivity of the Behavioral Approach System (BAS), cutting obliquely across Extraversion and Neuroticism.

Furthermore, when Sybil and Hans Eysenck isolated the Psychoticism dimension in the 1970s, items indexing rash, aggressive, and non-reflective behaviors loaded heavily on P rather than E. This necessitated a systematic factor-analytic separation of the broad construct into subcomponents. The I5 and I6 questionnaire projects empirically confirmed that “impulsiveness” was heterogeneous, culminating in the I7’s final formulation where:

• Venturesomeness serves as the legitimate primary offshoot of Extraversion (high reward drive, sensation seeking, low resting cortical arousal).
• Impulsiveness functions as an offshoot of Psychoticism and Neuroticism (executive dysfunction, poor serotonergic regulation, behavioral disinhibition, affective instability).
• Empathy functions as an inverse marker of Psychoticism, mapping onto oxytocinergic and prefrontal networks governing prosocial cognition and emotional resonance.

Validity

Extensive psychometric investigations have affirmed the construct, convergent, discriminant, and criterion validity of the Adult Impulsiveness Scale I7 across multiple populations and linguistic adaptations.

Construct and Structural Validity

Large-scale normative investigations, beginning with Eysenck, Pearson, Easting, and Allsopp (1985) across a standardized British adult sample (N = 1,023 males, 1,326 females), demonstrated that factor analysis consistently extracts three primary orthogonal to mildly correlated dimensions. The correlation between Impulsiveness and Venturesomeness is typically modest (r ≈ .15 to .28), validating their structural independence. Empathy exhibits near-zero or slightly negative correlations with Impulsiveness and Venturesomeness, confirming its distinct psychometric status.

Convergent and Discriminant Validity

Empirical studies evaluating the I7 alongside alternative personality inventories provide robust convergent and discriminant evidence:

• EPQ Alignment: Impulsiveness correlates substantially with EPQ Psychoticism (r = .40 to .55) and Neuroticism (r = .25 to .35), while displaying low or non-significant correlations with Extraversion. Venturesomeness correlates strongly with EPQ Extraversion (r = .50 to .65) and displays negligible associations with Neuroticism. Empathy correlates negatively with Psychoticism (r = -.40 to -.55) and positively with Neuroticism (r = .20 to .30).
• Zuckerman’s Sensation Seeking Scale (SSS-V): Venturesomeness correlates heavily with Thrill and Adventure Seeking (TAS; r = .60 to .75) and Experience Seeking (ES), whereas Impulsiveness aligns selectively with Disinhibition (Dis) and Boredom Susceptibility (BS).
• UPPS-P Impulsive Behavior Model: Impulsiveness on the I7 maps directly onto Lack of Premeditation (r = .65) and Positive/Negative Urgency, while Venturesomeness maps onto Sensation Seeking (r = .70).

Criterion and Clinical Validity

The I7 displays exemplary criterion-related validity in clinical, forensic, and behavioral paradigms:

• Forensic Populations: Incarcerated offenders score significantly higher on Impulsiveness than non-offender matched controls, with violent offenders exhibiting high Impulsiveness paired with profoundly depressed Empathy scores.
• Substance Use Disorders: Studies tracking individuals with alcohol and stimulant use disorders reveal that I7 Impulsiveness predicts treatment dropout, relapse frequency, and polysubstance abuse, whereas Venturesomeness predicts the early onset of experimental substance experimentation.
• Behavioral Economics and Laboratory Tasks: High I7 Impulsiveness correlates reliably with steep delay discounting rates and elevated commission errors on Go/No-Go and Continuous Performance Tasks (CPT), whereas Venturesomeness correlates with risk-taking on the Balloon Analogue Risk Task (BART) without accompanying attentional lapses.

Reliability

The Adult Impulsiveness Scale I7 possesses robust classical psychometric reliability metrics across diverse demographic strata, cultural contexts, and translated versions (including Spanish, French, German, Dutch, Chinese, and Japanese adaptations).

Internal Consistency

Standardized internal consistency assessments utilizing Cronbach’s alpha (α) yield stable coefficients across studies:

• Impulsiveness (19 items): Cronbach’s alpha typically ranges from .77 to .84 in non-clinical adult populations, and between .80 and .86 in psychiatric and forensic samples.
• Venturesomeness (16 items): Cronbach’s alpha typically ranges from .75 to .85, demonstrating high internal homogeneity among items measuring thrill and adventure preference.
• Empathy (19 items): Cronbach’s alpha ranges from .69 to .80. The slightly wider variability in Empathy alphas has been attributed to the multifaceted nature of affective empathy (capturing both personal distress and sympathetic concern).

Temporal Stability (Test-Retest Reliability)

Longitudinal stability evaluations confirm that the traits tapped by the I7 represent enduring temperamental dispositions rather than fluctuating state phenomena:

• Over a 4-week retest window, Pearson product-moment correlation coefficients (r) regularly exceed .82 for Impulsiveness, .85 for Venturesomeness, and .79 for Empathy.
• Over extended intervals (6 to 12 months), stability coefficients remain high (r = .70 to .78), demonstrating that the instrument is resistant to transient mood fluctuations or acute situational stressors.

Factor Analysis

The factorial structure of the I7 has been extensively examined using both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

Exploratory Factor Analysis (EFA)

In their seminal 1985 standardization study, Eysenck, Pearson, Easting, and Allsopp performed principal components analyses followed by Promax and Varimax rotations on the 54 items. The scree test and eigenvalue criteria (> 1.0) unambiguously corroborated three dominant eigenvalues corresponding precisely to Impulsiveness, Venturesomeness, and Empathy:

• Impulsiveness Items: High factor loadings (.40 to .70) on items reflecting non-deliberative actions (e.g., Item 9: “Do you generally do and say things without stopping to think?”; Item 11: “Do you often get into a jam because you do things without thinking?”; Item 22: “Do you often do things on the spur of the moment?”).
• Venturesomeness Items: High factor loadings (.45 to .75) on risk and adventure statements (e.g., Item 1: “Would you enjoy water skiing?”; Item 6: “Would you enjoy parachute jumping?”; Item 20: “Would you like to learn to fly an aeroplane?”; Item 39: “Would you like to go scuba diving?”).
• Empathy Items: High factor loadings (.35 to .65) on items assessing shared affect and compassion (e.g., Item 3: “Would you feel sorry for a lonely stranger?”; Item 18: “Does it affect you very much when one of your friends seems upset?”; Item 23: “Do you get very upset when you see someone cry?”).

Confirmatory Factor Analysis (CFA)

Modern structural equation modeling across international validation cohorts has confirmed the adequacy of the hypothesized three-factor model. While standard maximum likelihood CFA of dichotomous indicators can yield attenuated fit metrics due to restricted variance, robust weighted least squares estimators (WLSMV) consistently confirm acceptable fit:

• Comparative Fit Index (CFI) > .90
• Tucker-Lewis Index (TLI) > .90
• Root Mean Square Error of Approximation (RMSEA) < .055 (90% CI [.048, .061])
• Standardized Root Mean Square Residual (SRMR) < .060

Alternative models specifying a single generalized “disinhibition” factor or a two-factor structure (merging Impulsiveness and Venturesomeness) demonstrate substantially degraded fit, confirming that Impulsiveness and Venturesomeness are psychometrically distinct constructs that must not be collapsed.

Instrument / Measurement Tool

The Adult Impulsiveness Scale I7 is structured as a standardized, self-administered psychometric questionnaire:

• Test Type: Self-report psychological inventory / personality scale.
• Target Population: Adults and adolescents aged 16 years and older (a youth version, the Junior I7, exists for younger age brackets).
• Item Count: 54 items.
• Subscale Breakdown:
  • Impulsiveness (Imp): 19 items
  • Venturesomeness (Vent): 16 items
  • Empathy (Emp): 19 items
• Response Format: Forced-choice dichotomous format (YES / NO).
• Administration Time: Approximately 8 to 12 minutes.
• Scoring Methodology:
  • Each item is scored 1 point for the keyed response and 0 points for the non-keyed response.
  • Subscale scores are derived by summing the endorsed keyed items for each respective subscale.
  • Higher scores indicate higher levels of Impulsiveness, Venturesomeness, or Empathy.
  • Normative comparisons utilize sex- and age-differentiated standard scores or percentiles established in large-scale epidemiological samples (Eysenck et al., 1985).

Permissions & Fee and Test Year

The Adult Impulsiveness Scale I7 was published in 1985 by Sybil B. G. Eysenck, Paul R. Pearson, Geoffrey Easting, and J. Frank Allsopp in the peer-reviewed journal Personality and Individual Differences (Pergamon Press / Elsevier). Under standard academic publishing conventions, the scale items were placed in the public scientific domain for scholarly research and clinical training. Commercial distribution, translation rights for published psychological test batteries, or inclusion in proprietary electronic assessment platforms may require permission from the copyright holder (Elsevier / the Eysenck estate). Academic researchers may utilize the scale without royalty fees provided full formal bibliographic attribution is given to the authors and original publication.

References

Eysenck, H. J., & Eysenck, S. B. G. (1975). Manual of the Eysenck Personality Questionnaire (Junior and Adult). Hodder & Stoughton.

Eysenck, S. B. G., & Eysenck, H. J. (1978). Impulsiveness and venturesomeness: Their position in a dimensional system of personality description. Psychological Reports, 43(3), 1247–1255. https://doi.org/10.2466/pr0.1978.43.3.1247

Eysenck, S. B. G., Easting, G., & Pearson, P. R. (1984). Age norms for Impulsiveness, Venturesomeness and Empathy in children. Personality and Individual Differences, 5(3), 315–321. https://doi.org/10.1016/0191-8869(84)90070-9

Eysenck, S. B. G., Pearson, P. R., Easting, G., & Allsopp, J. F. (1985). Age norms for Impulsiveness, Venturesomeness and Empathy in adults. Personality and Individual Differences, 6(5), 613–619. https://doi.org/10.1016/0191-8869(85)90011-X

Gray, J. A. (1981). A critique of Eysenck’s theory of personality. In H. J. Eysenck (Ed.), A Model for Personality (pp. 246–276). Springer-Verlag. https://doi.org/10.1007/978-3-642-67783-0_8

Miller, E. (2003). The Measurement of Impulsivity (Doctoral dissertation). Coventry University and University of Warwick. 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, 18(12), 1436–1452.

Whiteside, S. P., & Lynam, D. R. (2001). The Five Factor Model and impulsivity: Using a structural model of personality to understand impulsivity. Personality and Individual Differences, 30(4), 669–689. https://doi.org/10.1016/S0191-8869(00)00064-7

Zuckerman, M. (1994). Behavioral Expressions and Biosocial Bases of Sensation Seeking. Cambridge University Press.

Items of the Scale