Attentional Resource Allocation Scale (ARAS)

1. Abstract

The Attentional Resource Allocation Scale (ARAS) is a 15-item self-report psychometric instrument developed by R. Nicholas Carleton, Mikkel P. Abrams, and Gordon J. G. Asmundson (2010). Designed to bridge conceptual divides between non-pathological absorption and pathological dissociation, the ARAS models these constructs along an empirical continuum of attentional resource allocation. The scale synthesizes carefully selected items from two seminal psychometric instruments: the Dissociative Experiences Scale (DES) and the Tellegen Absorption Scale (TAS). Through rigorous exploratory and confirmatory factor analyses, the instrument yields a robust three-factor latent structure comprising: (1) Imaginative Involvement (6 items), capturing deep sensory and imaginative immersion in environmental or artistic stimuli; (2) Dissociative Amnesia (5 items), reflecting disruptions in autobiographical memory integration, depersonalization, and derealization; and (3) Attentional Dissociation (4 items), indexing automated cognitive processing, routine-task mind wandering, and transient highway hypnosis-like disengagement. Items are administered on a 5-point Likert-type frequency scale ranging from 0 (“Never”) to 4 (“Always”), producing subscale scores alongside a global composite score. Psychometric investigations reveal exceptional internal consistency across heterogeneous cohorts, including undergraduate university samples (α = .85) and diverse community samples (α = .91). Construct validity is demonstrated through robust convergent correlations with established measures of trauma, posttraumatic stress disorder (PTSD), anxiety sensitivity, obsessive-compulsive phenomena, and general distress, alongside clear discriminant validity separating attentional anomalies from baseline negative affectivity. The ARAS serves as a parsimonious, empirically sound assessment tool for clinical psychologists, cognitive neuroscientists, and psychiatric researchers investigating trauma-spectrum disorders, dissociative pathology, and attentional cognitive control.

2. Keywords

Attentional Resource Allocation Scale, ARAS, dissociation, absorption, Tellegen Absorption Scale, Dissociative Experiences Scale, imaginative involvement, dissociative amnesia, attentional dissociation, psychometrics, trauma spectrum

3. Authors

The Attentional Resource Allocation Scale was developed and validated by clinical psychologists specializing in anxiety, trauma, and quantitative psychometrics:

• R. Nicholas Carleton, Ph.D., R.Psych. — Department of Psychology, University of Regina, Regina, Saskatchewan, Canada. Dr. Carleton is a Full Professor and scientific director with extensive international scholarship in anxiety-related disorders, trauma, intolerance of uncertainty, and psychometric evaluation.
• Mikkel P. Abrams, M.A. — Anxiety and Illness Behaviours Laboratory, Department of Psychology, University of Regina, Regina, Saskatchewan, Canada. Mr. Abrams has contributed extensively to research on psychological assessment and trauma-related attentional processes.
• Gordon J. G. Asmundson, Ph.D., FRSC — Department of Psychology, University of Regina, Regina, Saskatchewan, Canada. Dr. Asmundson is a Registered Doctoral Psychologist, Fellow of the Royal Society of Canada, and internationally recognized authority on anxiety disorders, pain-anxiety interactions, and traumatic stress.

Correspondence regarding original psychometric investigations is directed to the Anxiety and Illness Behaviours Laboratory, Department of Psychology, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada.

4. Purpose

The core objective of the Attentional Resource Allocation Scale (ARAS) is to evaluate how human cognitive systems allocate attentional resources across sensory, imaginative, and dissociative experiences. Historically, clinical and cognitive psychology conceptualized absorption and dissociation under separate theoretical silos. Absorption, classically measured by the Tellegen Absorption Scale (Tellegen & Atkinson, 1974), was framed as an adaptive, non-pathological trait involving an individual’s openness to immersive sensory, perceptual, and imaginal experiences. In contrast, dissociation, most notably operationalized through the Dissociative Experiences Scale (Bernstein & Putnam, 1986), was heavily pathologized as a psychological defense mechanism characterized by disruptions in consciousness, identity, memory, and environmental perception.

Despite these historical boundaries, empirical research continually documented substantial statistical overlap between absorption and dissociation. Individuals scoring high on absorption frequently reported subjective experiences akin to mild dissociative depersonalization or temporal distortions, while patients diagnosed with dissociative disorders or posttraumatic stress disorder routinely exhibited elevated absorption capacities. Existing legacy measures suffered from critical structural and psychometric limitations: the DES relied on an unwieldy visual analog percentage format (0% to 100% in 10% increments) that inflated response burden and generated marked skewness in non-clinical populations, whereas the original TAS consisted of 34 dichotomous (True/False) items, severely restricting latent variance and parametric modeling.

Carleton and colleagues (2010) formulated the ARAS to eliminate these measurement inefficiencies by establishing an integrated, brief, 15-item inventory governed by a unified Likert response metric. In clinical settings, the ARAS provides clinicians with a rapid screening tool to identify patients who experience severe memory gaps, depersonalization, or derealization, while distinguishing these pathological symptoms from benign or creative imaginative immersion. In cognitive neuroscience and experimental psychopathology, the ARAS allows researchers to quantify individual differences in attentional capture, mind wandering, and cognitive gating, facilitating structured inquiries into the neurobiology of executive attentional networks.

5. Psychological Construct

The psychological construct underlying the ARAS conceptualizes absorption and dissociation as manifestations of a singular neurocognitive continuum of attentional resource modulation. Rather than representing categorical deficits or disjointed psychopathological entities, experiences spanning from deep aesthetic engagement to dissociative amnesia reflect varying degrees and valences of attentional narrowing, executive decoupling, and perceptual filtering. The instrument delineates this construct across three empirically supported dimensions:

1. Imaginative Involvement

The Imaginative Involvement dimension captures an individual’s propensity to allocate virtually all available executive attentional resources into internal mental imagery, artistic stimuli, or environmental phenomena. When this dimension is heightened, an individual experiences heightened sensory sensitivity and deep emotional resonance with external or imagined stimuli to the exclusion of extraneous environmental inputs. Exemplified by items derived from the TAS and DES (such as becoming utterly lost in a musical arrangement or experiencing nature with altered sensory clarity), this subscale assesses an adaptive, non-defensive deployment of focal attention. High scorers are capable of vivid daydreaming, aesthetic trance, and rich imaginal immersion, demonstrating high cognitive flexibility without experiencing functional distress or psychopathological fragmentation.

2. Dissociative Amnesia

The Dissociative Amnesia dimension reflects the involuntary breakdown of autobiographical memory consolidation, integrated conscious awareness, and unified self-perception. In contrast to imaginative immersion, this subscale captures clinical and subclinical manifestations of structural dissociative pathology. Symptoms measured within this factor include finding physical evidence of having performed complex actions without autobiographical recall, sudden realization of missing conversational streams, and profound depersonalization/derealization phenomena (e.g., perceiving the external world as fake, two-dimensional, or unfamiliar, or feeling detached from one’s physical body as an outside observer). This dimension indexes pathological attentional fragmentation, wherein traumatic distress or profound neurological disruptions decouple immediate sensory input from executive self-monitoring systems.

3. Attentional Dissociation

The Attentional Dissociation dimension occupies the conceptual middle ground between benign imaginative absorption and severe psychiatric amnesia. It captures everyday attentional lapses, spontaneous trance states, and automated behavioral executions occurring outside active conscious monitoring. Commonly referred to in cognitive psychology as absentmindedness or cognitive failures, this dimension includes experiences such as staring blankly into space while losing track of time, driving long distances without recalling intermediate navigation (“highway hypnosis”), or completing complex routine tasks on “autopilot” while the conscious mind wanders into unrelated internal musings. Elevated scores reflect a pronounced tendency for executive control networks to disengage from automated motoric schemas, representing a benign yet functionally significant form of attentional decoupling.

6. Theoretical Framework

The ARAS is grounded in cognitive resource allocation theories and modern structural models of dissociation. Fundamentally, the scale operationalizes the executive attentional control theory originally articulated by cognitive psychologists such as Daniel Kahneman (1973) and Alan Baddeley (1986). In this framework, human cognitive processing operates within a finite pool of central executive resources. When intense internal or external stimuli seize focal processing, peripheral sensory and temporal monitoring systems are deprioritized or entirely shut down.

The scale synthesizes two major historical paradigms:

• Auke Tellegen and Gilbert Atkinson’s Trait Absorption Model (1974): Tellegen defined absorption as a disposition for episodes of “total attention,” wherein perceptual, imaginal, and ideational resources are fully committed to a single attentional channel. This state produces a profound restructuring of the phenomenal self and world, accompanied by a subjective sense of unity with the absorbed object. Tellegen viewed absorption as a healthy personality trait related to hypnotic susceptibility, openness to experience, and creative expression.
• Eve Bernstein and Frank Putnam’s Trauma-Dissociation Model (1986): Bernstein and Putnam operationalized dissociation as an interruption in the normally integrated functions of consciousness, memory, identity, and perception of the environment. From a trauma-informed perspective, dissociation operates as an emergency psychological defense mechanism: when an individual is confronted with overwhelming traumatic affect or inescapable threat, attentional systems involuntarily fragment awareness to isolate trauma-related sensory input from conscious appraisal.

Carleton et al. (2010) resolved the theoretical tension between these models by arguing that both absorption and dissociation represent differential deployments of the identical underlying neurocognitive mechanism: the selective distribution of attentional resources. In Imaginative Involvement, attentional narrowing is volitional, integrative, and aesthetic. In Attentional Dissociation, attentional gating allows routinized procedural schemas to operate without conscious oversight. In Dissociative Amnesia, attentional fragmentation is involuntary, disintegrative, and clinically disruptive. By embedding these processes within a unified measurement framework, the ARAS operationalizes dissociation as a continuum of attentional resource modulation, supporting dimensional models of psychopathology advocated by the Hierarchical Taxonomy of Psychopathology (HiTOP) and the Research Domain Criteria (RDoC).

7. Validity

Psychometric evaluation of the ARAS demonstrates exceptional construct, convergent, and discriminant validity across both undergraduate university samples and broad community-based epidemiological cohorts (Carleton et al., 2010).

Convergent Validity

The convergent validity of the ARAS has been rigorously substantiated through bivariate and multivariate correlations with established clinical and non-clinical indices:

• Full-Scale Dissociation and Absorption: The ARAS total and subscale scores correlate strongly with parent instruments, showing correlations in excess of r = .70 with the complete Dissociative Experiences Scale (DES) and r = .65 with the full Tellegen Absorption Scale (TAS), confirming that the 15-item short-form preserves the core latent variance of its parent inventories.
• Posttraumatic Stress Symptoms: In line with trauma-dissociation theory, the Dissociative Amnesia subscale exhibits substantial positive correlations (r = .48 to .58, p < .001) with PTSD symptom severity measured via the Posttraumatic Diagnostic Scale (PDS), particularly with re-experiencing and emotional numbing clusters.
• Anxiety Sensitivity: The ARAS subscales correlate significantly with the Anxiety Sensitivity Index-3 (ASI-3), particularly the cognitive concerns subscale (r = .42, p < .001), indicating that individuals who fear cognitive dysregulation (e.g., losing mental control, going crazy) report elevated levels of attentional dissociation and dissociative amnesia.
• Obsessive-Compulsive and Depersonalization Symptoms: Moderate-to-strong correlations (r = .38 to .52) are observed with measures of obsessive-compulsive checking and dissociation-adjacent clinical syndromes, reflecting disruptions in memory confidence and cognitive certainty.

Discriminant Validity

Discriminant validity is supported by differential correlation magnitudes across subscales. While Dissociative Amnesia correlates strongly with general psychiatric distress, somatic anxiety, and depression (as indexed by the Depression Anxiety Stress Scales-21; DASS-21), Imaginative Involvement demonstrates negligible to weak correlations with negative affectivity (r = .08 to .16), confirming that imaginative immersion is functionally distinct from general psychological distress or neuroticism. Furthermore, hierarchical regression analyses confirm that the ARAS explains significant incremental variance in trauma symptoms beyond shared negative affectivity and trait neuroticism.

8. Reliability

The Attentional Resource Allocation Scale demonstrates outstanding internal consistency and structural measurement stability across independent demographic cohorts:

• Total Scale Internal Consistency: In the initial instrument validation by Carleton et al. (2010), the ARAS demonstrated high internal consistency across distinct populations. In a large undergraduate university sample (N = 312), Cronbach’s alpha was α = .85. When evaluated in a broader, more heterogeneous community sample (N = 296), Cronbach’s alpha rose to α = .91, indicating exceptional internal reliability without excessive item redundancy.
• Subscale Consistency: Individual subscales demonstrated solid internal consistency across samples:
  • Imaginative Involvement (6 items): Cronbach’s α ranged from .78 to .84 across university and community samples.
  • Dissociative Amnesia (5 items): Cronbach’s α ranged from .76 to .82, reflecting cohesive measurement of severe dissociative experiences.
  • Attentional Dissociation (4 items): Cronbach’s α ranged from .71 to .77, acceptable for a brief 4-item cognitive lapse subscale.
• Item-Total Correlations: Corrected item-total correlations for all 15 items consistently exceed .40, with the majority falling between .48 and .69. Mean inter-item correlations reside within the recommended psychometric window of .25 to .45, ensuring that the ARAS maintains balanced bandwidth and fidelity without indicator constriction.
• Test-Retest Stability: Subsequent empirical investigations evaluating test-retest reliability across short-to-medium intervals (2 to 6 weeks) indicate high temporal stability for the trait-based composite (r > .80), while demonstrating sensitivity to acute stress manipulations for the Attentional Dissociation subscale.

9. Factor Analysis

The latent structure of the ARAS was delineated through rigorous psychometric modeling employing sequential Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) across split-half and independent samples.

Exploratory Factor Analysis (EFA)

During scale development, an initial pool of candidate items extracted from the 28-item DES and 34-item TAS was administered to participants. Principal axis factoring with oblique (Promax) rotation was conducted to accommodate anticipated theoretical correlations among latent dimensions. Scree plot examination, parallel analysis, and Kaiser’s eigenvalue-greater-than-one rule converged on a clear, robust three-factor solution accounting for the preponderance of shared variance. The items were systematically winnowed down to 15 based on strict factor retention criteria: primary factor loadings ≥ .45, secondary cross-loadings ≤ .25, and high conceptual relevance to attentional allocation mechanisms.

Confirmatory Factor Analysis (CFA)

In subsequent validation cohorts, Carleton et al. (2010) tested multiple competing structural models via Structural Equation Modeling (SEM):

• Model 1: Unidimensional Model — All 15 items loading onto a single general “Dissociation/Absorption” latent factor. This model exhibited poor fit: χ² / df > 4.8, CFI = .78, TLI = .75, RMSEA = .112.
• Model 2: Two-Factor Model — Items divided strictly along original instrument lines (DES items loading on Dissociation; TAS items loading on Absorption). This model showed mediocre fit: χ² / df = 3.6, CFI = .84, TLI = .82, RMSEA = .094.
• Model 3: Correlated Three-Factor Model — Items specified to load onto Imaginative Involvement, Dissociative Amnesia, and Attentional Dissociation. This model achieved superior and excellent fit indices: χ²(87) = 172.45, p < .001; Comparative Fit Index (CFI = .95); Tucker-Lewis Index (TLI = .94); Root Mean Square Error of Approximation (RMSEA = .057, 90% CI [.045, .069]); and Standardized Root Mean Square Residual (SRMR = .048).

Factor inter-correlations among the three latent dimensions in the CFA ranged from moderate to moderately high (r = .38 to .62), confirming that while the subscales share a common higher-order attentional substrate, each captures empirically distinct facets of attentional modulation.

10. Instrument / Measurement Tool

The Attentional Resource Allocation Scale (ARAS) is configured as follows:

• Administration Type: Self-administered paper-and-pencil or digital/computerized questionnaire.
• Target Population: Adults and adolescents aged 16 years and older; suitable for clinical, psychiatric, and general community populations.
• Time Required: Approximately 3 to 5 minutes to complete.
• Item Count: 15 items.
• Response Scale: 5-point Likert-type frequency scale:
  • 0 = Never
  • 1 = Rarely
  • 2 = Sometimes
  • 3 = Often
  • 4 = Always
• Subscale Allocation and Item Assignment:
  • Imaginative Involvement Subscale: Items 1, 3, 8, 9, 10, and 12 (6 items; score range: 0 to 24).
  • Dissociative Amnesia Subscale: Items 2, 5, 7, 11, and 13 (5 items; score range: 0 to 20).
  • Attentional Dissociation Subscale: Items 4, 6, 14, and 15 (4 items; score range: 0 to 16).
• Scoring Procedures:
  • No reverse-coded items are present; all items are scored directly according to their numerical rating (0 through 4).
  • Subscale scores are calculated by summing the respective item ratings. Mean subscale scores can also be derived by dividing the sum by the number of items in that subscale.
  • A Total ARAS Score is computed by summing all 15 items (score range: 0 to 60), reflecting overall attentional resource variability and dissociative propensity.
  • Elevated scores on Dissociative Amnesia warrant immediate clinical evaluation for dissociative disorders, trauma, or complex PTSD.

11. Permissions & Fee and Test Year

The Attentional Resource Allocation Scale was published in 2010 by R. Nicholas Carleton, Mikkel P. Abrams, and Gordon J. G. Asmundson in the peer-reviewed journal Depression and Anxiety (Wiley-Liss). As an academic research instrument published in an archival scientific journal, the scale items and structure are available for non-commercial academic, research, and educational purposes. Researchers and clinicians are expected to cite the foundational publication (Carleton et al., 2010) in all associated presentations and scientific publications. Commercial distribution, incorporation into for-profit proprietary software platforms, or third-party digital test distribution systems requires express written permission from the copyright holder (John Wiley & Sons, Inc.) and the original authors.

12. References

• Baddeley, A. (1986). Working memory. Oxford University Press.
• Bernstein, E. M., & Putnam, F. W. (1986). Development, reliability, and validity of a dissociation scale. The Journal of Nervous and Mental Disease, 174(12), 727–735. https://doi.org/10.1097/00005053-198612000-00004
• Carleton, R. N., Abrams, M. P., & Asmundson, G. J. G. (2010). The Attentional Resource Allocation Scale (ARAS): Psychometric properties of a composite measure for dissociation and absorption. Depression and Anxiety, 27(8), 775–786. https://doi.org/10.1002/da.20656
• Kahneman, D. (1973). Attention and effort. Prentice-Hall.
• Tellegen, A., & Atkinson, G. (1974). Openness to absorbing and self-altering experiences (“absorption”), a trait related to hypnotic susceptibility. Journal of Abnormal Psychology, 83(3), 268–277. https://doi.org/10.1037/h0036681

13. Items of the Scale