Emotional Stress Reaction Questionnaire (ESRQ)

Abstract

The Emotional Stress Reaction Questionnaire (ESRQ) is a highly efficient, 14-item self-report inventory developed by Gerry Larsson to provide a rapid, immediate assessment of an individual’s psychological state following or preceding a high-stakes event. Designed specifically for operational environments—such as those involving military personnel, police officers, and pilots—the ESRQ measures the strength and level of the transient stress reaction. Its brevity allows for administration in approximately 60 seconds, making it uniquely suited for quantifying psychological responses during exposure to acute stress where longer, traditional instruments are impractical or introduce significant response bias.

Keywords

Emotional Stress Reaction Questionnaire, ESRQ, Gerry Larsson, military psychology, rapid assessment, stress reaction strength, cognitive appraisal, field conditions, operational stress, psychological state.

Authors

Gerry Larsson

Purpose

The primary mandate of the ESRQ is the accurate and exceptionally fast quantification of an individual’s momentary stress reaction strength. Initially developed in Swedish as the Emotionella StressreaktionsEnkäten (ESE), the instrument fills a critical gap in psychological assessment by providing a reliable snapshot of the psychological status immediately before, during, or after highly demanding operational events.

The scale’s application is centered on assessing the immediate emotional and cognitive impact of a severe stressor, allowing researchers and practitioners to quantify the level of psychological preparedness, resilience, or distress experienced by individuals in real-time. This rapid methodology is essential for empirical studies investigating the complex interplay between personality factors, extreme environmental demands, and the resulting emotional response in high-risk professional settings.

Construct

The ESRQ is designed to measure the psychological construct encompassing immediate emotional and cognitive appraisal processes that occur under acute duress. The 14 items are carefully selected to capture a broad spectrum of self-reported feelings, ranging from adaptive, performance-enhancing states (e.g., Focused, Alert, Energetic) to profoundly negative or maladaptive affective states (e.g., Angry, Disappointed, Uncertain).

The theoretical foundation of the scale posits that an individual’s rapid appraisal of a stressful situation, coupled with their immediate coping processes, directly dictates the intensity of their stress reaction and subsequent operational effectiveness. By measuring these transient states quickly and efficiently, the ESRQ provides crucial empirical evidence regarding the psychological mechanisms that underpin performance resilience and vulnerability in stressful environments.

Validity

The validity of the ESRQ has been robustly established primarily through its consistent deployment in high-demand, high-fidelity research settings involving highly trained professional groups. Evidence for construct validity is derived from studies demonstrating strong correlations between ESRQ scores and objectively observable behaviors or measurable performance outcomes, particularly in populations facing extreme physiological and psychological demands, such as military pilots during simulated ejection scenarios or police officers managing complex, acute stress situations.

Empirical research indicates that scores derived from the ESRQ are effective in differentiating between varying degrees of successful coping processes and overall performance efficiency. This reinforces the instrument’s capability to capture a psychologically meaningful and operationally relevant state. Furthermore, the instrument’s demonstrated ability to measure shifts in emotional states across different phases of a stressful event confirms its utility as a reliable state measure.

Reliability

While specific psychometric statistics, such as Cronbach’s alpha coefficients, are detailed in the comprehensive academic literature, the fundamental reliability of the ESRQ is rooted in its focused selection of items that accurately reflect core dimensions of the stress response. The scale’s intentional brevity significantly enhances its ecological reliability when utilized in demanding field conditions, as it minimizes the response bias often associated with requiring prolonged introspection during periods of intense stress exposure.

The consistent use of the ESRQ over several decades by Larsson and his colleagues in studies involving diverse samples of highly trained professionals attests to its robustness. Its streamlined, focused structure ensures that the items consistently and reliably tap into the intended construct of immediate emotional reaction strength, providing stable measurements of transient psychological states.

Factor Analysis

Despite its concise nature, factor analytic studies of the ESRQ typically reveal distinct underlying dimensions. These factors generally correspond to dimensions of positive activation (e.g., vigilance, energy, focus) and negative affect or distress (e.g., anger, disappointment). The deliberate inclusion of both positively and negatively valenced items is crucial, as it allows the ESRQ to comprehensively assess the full complexity of a stress reaction, which frequently involves a dynamic mix of focused arousal and debilitating emotional tension.

The resulting factor structure strongly supports the scale’s utility in research contexts focused on appraisal and cognitive coping models. The ability to clearly differentiate between adaptive states like ‘Alert’ (representing functional arousal) and maladaptive states such as ‘Angry’ (representing emotional distress) is essential for accurately modeling psychological resilience and predicting performance maintenance under extreme operational pressure.

Instrument

Test Type: Self-report Questionnaire (State Measure)

Format: 14 items rated on a 4-point Likert scale.

Language Available: Swedish (Original: ESE), English (ESRQ), and likely other languages utilized in international military research collaborations (e.g., NATO proceedings).

Population Group: Adults, specifically operational professionals routinely exposed to high-risk or extremely demanding environments.

Age Group: Adult (typically 20+ years).

Population Details: Military personnel, pilots, police officers, emergency services personnel, and individuals in other highly demanding professional roles requiring peak performance under pressure.

Test Methodology: Rapid assessment (designed for administration in approximately 60 seconds) of the current psychological and emotional state immediately following or preceding a significant, acute stress event.

Keywords

Emotional appraisal, reaction strength, military operational stress, resilience, psychological state, performance under stress, FOA rapport, brief scale, acute psychological response, state measure.

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: Not provided in source content.

Correspondence Address: Not provided in source content.

Permissions & Fee and Test Year

The initial version, known as the ESE, was first developed and published in 1987 (Larsson, 1987). The ESRQ has been extensively employed in publicly funded military and defense research settings globally. Researchers seeking specific usage permissions or information regarding potential licensing fees should directly consult the primary author (Gerry Larsson) or refer to the original institutional reports, such as the FOA rapport.

The instrument’s technical details and usage documentation are often accessible through published technical reports, notably those maintained by the Defense Technical Information Center (DTIC). The original PDF documentation is publicly accessible. The original PDF can be downloaded here: http://www.dtic.mil/get-tr-doc/pdf?AD=ADA582838

Reference’s

Larsson‚ G. (1987). Snabb mätning av individuell stressreaktionsstyrka: Utveckling av den Emotionella StressreaktionsEnkäten (ESE). Reviderad version [Fast measurement of individual stress reaction strength: Development of the Emotional Stress Reaction Questionnaire (ESRQ). Revised version.] Stockholm‚ Sweden: FOA rapport C 50050-5.3.

Larsson‚ G. (1989). Personality‚ appraisal and cognitive coping processes‚ and performance during various conditions of stress. Military Psychology‚ 1‚ 167-182.

Larsson‚ G.‚ & Hayward‚ B. (1990). Appraisal and coping processes immediately before ejection: A study of Australian and Swedish pilots. Military Psychology‚ 2‚ 63-78.

Larsson‚ G.‚ Kempe‚ S.‚ & Starrin‚ B. (1988). Appraisal and coping processes in acute‚ time-limited stressful situations: A study of police officers. European Journal of Personality‚ 2‚ 259-276.

Larsson‚ G.‚ & Wilde Larsson‚ B. (2010). Quality of care and patient satisfaction: A new theoretical and methodological approach. International Journal of Health Care Quality Assurance‚ 23‚ 228-247.

Larsson‚ Gerry. (2011). The Emotional Stress Reaction Questionnaire (ESRQ): Measurement of Stress Reaction Level in Field Conditions in 60 Seconds. Proceeding of NATO HFM-205 Mental Health and Well-Being Across the Military Spectrum‚ Bergen‚ Norway. Retrieved from http://myrto.rto.nato.int/hfm-205/default.aspx

Items of the Emotional Stress Reaction Questionnaire (ESRQ)

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

1. Indifferent
2. Relaxed
3. Pleased
4. Glad
5. Alert
6. Focused
7. Concentrated
8. Energetic
9. Concerned
10. Uncertain
11. Disappointed
12. Heated
13. Mad
14. Angry

Response Scale:

1. The word does not correspond to how you felt right then
2. The word partly corresponds to how you felt right then
3. The word fairly well corresponds to how you felt right then
4. The word completely corresponds to how you felt right then