Highly Sensitive Person Scale (HSP Scale)

Abstract

The Highly Sensitive Person Scale (HSP Scale) is a widely utilized 27-item self-report questionnaire developed by Drs. Elaine and Arthur Aron in 1997. It is designed to quantify the degree of High Sensitivity (HS), or Sensory Processing Sensitivity (SPS), in adults. The items are scored on a 7-point Likert scale and assess various facets of sensitivity, including emotional, social, and cognitive dimensions. A score of 14 or above typically indicates a high likelihood of possessing this innate personality trait, which is estimated to affect 15–20% of the human population. The scale serves as a crucial tool for self-understanding and developing effective coping strategies related to heightened sensory and emotional processing.

Keywords

Highly Sensitive Person Scale, HSP Scale, Sensory Processing Sensitivity, SPS, High Sensitivity, Elaine Aron, Arthur Aron, personality trait, self-report, psychometrics.

Authors

Elaine Aron, Ph.D., Arthur Aron, Ph.D.

Purpose

The primary purpose of the HSP Scale is to provide a standardized, quantifiable measure of the innate personality trait of High Sensitivity (HS) in the adult population. By offering a numerical score, the scale allows individuals to gain objective insight into their heightened awareness and responsiveness to stimuli, which is often characterized by deeper processing of information.

Beyond its use in research, the scale is an essential clinical instrument used to facilitate self-recognition and guide therapeutic interventions. It helps individuals identify tailored coping mechanisms for managing potential sensory overload and maximizing the inherent strengths—such as deep thinking, creativity, and high empathy—associated with Sensory Processing Sensitivity.

Construct

The HSP Scale measures Sensory Processing Sensitivity (SPS), which is the scientifically recognized term for the trait commonly known as High Sensitivity. SPS is conceptualized as a genetically determined, non-pathological personality trait characterized by a highly responsive nervous system that processes sensory and environmental information more deeply and thoroughly than average.

This heightened sensitivity manifests across several domains, including a strong awareness of subtle environmental cues, intense emotional reactions, and complex cognitive processing. The scale specifically targets various dimensions of this construct:

• Sensory processing sensitivity
• Emotional sensitivity
• Social sensitivity
• Thinking sensitivity
• Imagination sensitivity

Validity

The HSP Scale has demonstrated substantial evidence of validity as a measure of high sensitivity within the field of psychometrics. Specifically, it exhibits strong discriminant validity, differentiating the construct of SPS from related but distinct traits such as introversion, shyness, or neuroticism. This suggests the scale accurately measures the unique dimensions of Sensory Processing Sensitivity rather than overlapping constructs.

Furthermore, its construct validity is supported by its correlation with expected behavioral outcomes and psychological characteristics associated with deeply processing information, confirming that the instrument measures what it purports to measure within the theoretical framework established by the Arons in their seminal 1997 publication.

Reliability

The reliability of the HSP Scale is well-established across various administration settings. Studies have confirmed good internal consistency, often measured using Cronbach’s alpha, indicating that the 27 items reliably measure the same underlying construct. This consistency is crucial for ensuring the accuracy of individual scores.

Additionally, the scale has shown satisfactory test-retest reliability, meaning that scores remain stable when the scale is administered to the same individuals over reasonable periods of time, reflecting the enduring nature of the underlying personality trait. The scale has also been proven sensitive enough to detect genuine changes in self-reported sensitivity levels over time, particularly in response to major life events or psychological interventions.

Factor Analysis

While the original 1997 scale was often utilized as a unidimensional measure yielding a single overall score for High Sensitivity, subsequent comprehensive factor analyses have frequently supported a multi-factor structure. The items typically cluster around several distinct, yet correlated, subscales that reflect the different ways SPS manifests.

Commonly identified factors include: ‘Ease of Excitation/Overarousability’ (EOE), ‘Aesthetic Sensitivity’ (AES), and ‘Low Sensory Threshold’ (LST). Although the total score remains the standard clinical measure, the recognition of these underlying dimensions aids researchers and clinicians in interpreting the nuanced manifestation of the trait in an individual.

Instrument

Test Type: Self-report questionnaire

Format: 27 items utilizing a 7-point Likert scale (1 = Not at All, 7 = Extremely)

Language Available: English (Original), with official and validated translations available in numerous languages including German, Spanish, Japanese, Dutch, and French, reflecting its global applicability.

Population Group: General population

Age Group: Adults (typically 18 years and older)

Population Details: The trait of Sensory Processing Sensitivity is estimated to occur in 15–20% of the population, independent of culture, gender, or socioeconomic status, suggesting it is a fundamental biological temperament.

Test Methodology: Scores are calculated by summing the ratings across all 27 items. A score of 14 or higher typically serves as a clinical indicator that a person is likely to be highly sensitive, though the full range of scores is utilized for precise research analysis.

Keywords

Aron, Highly Sensitive Person, SPS, internal consistency, test-retest reliability, discriminant validity, sensory input, emotional depth, temperament, overarousal.

Authors

Author ORCID Identifier: Not specified in original documentation; research publications should be consulted for current ORCID identifiers.

Affiliation Email addresses: The original contact email provided for additional information is [email protected] (associated with Stony Brook University at the time of publication).

Correspondence Address: Correspondence regarding the scale is typically directed through the official research websites associated with Drs. Elaine and Arthur Aron.

Permissions & Fee and Test Year

The Highly Sensitive Person Scale was first published and validated in 1997. The scale is widely available for non-commercial, academic research purposes, often requiring proper citation of the original source and, in some cases, direct permission from Dr. Elaine Aron. For clinical or commercial applications, specific licensing agreements and fees may apply.

Reference’s

Aron, E. N., & Aron, A. (1997). Sensory-processing sensitivity and its relation to introversion and emotionality. Journal of Personality and Social Psychology, 73(2), 345–368.

Items of the Highly Sensitive Person Scale (HSP Scale)

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

INSTRUCTIONS: This questionnaire is completely anonymous and confidential. Answer each question according to the way you personally feel, using the following scale:

1	2	3	4	5	6	7
Not at All			Moderately			Extremely

1.     Are you easily overwhelmed by strong sensory input?
2.     Do you seem to be aware of subtleties in your environment?
3.     Do other people’s moods affect you?
4.     Do you tend to be more sensitive to pain?
5.     Do you find yourself needing to withdraw during busy days, into bed or into a darkened room or any place where you can have some privacy and relief from stimulation?
6.     Are you particularly sensitive to the effects of caffeine?
7.     Are you easily overwhelmed by things like bright lights, strong smells, coarse fabrics, or sirens close by?
8.     Do you have a rich, complex inner life?
9.     Are you made uncomfortable by loud noises?
10.     Are you deeply moved by the arts or music?
11.     Does your nervous system sometimes feel so frazzled that you just have to go off by yourself?
12.     Are you conscientious?
13.     Do you startle easily?
14.     Do you get rattled when you have a lot to do in a short amount of time?
15.     When people are uncomfortable in a physical environment do you tend to know what needs to be done to make it more comfortable (like changing the lighting or the seating)?
16.     Are you annoyed when people try to get you to do too many things at once?
17.     Do you try hard to avoid making mistakes or forgetting things?
18.     Do you make a point to avoid violent movies and TV shows?
19.     Do you become unpleasantly aroused when a lot is going on around you?
20.     Does being very hungry create a strong reaction in you, disrupting your concentration or mood?
21.     Do changes in your life shake you up?
22.     Do you notice and enjoy delicate or fine scents, tastes, sounds, works of art?
23.     Do you find it unpleasant to have a lot going on at once?
24.     Do you make it a high priority to arrange your life to avoid upsetting or overwhelming situations?
25.     Are you bothered by intense stimuli, like loud noises or chaotic scenes?
26.     When you must compete or be observed while performing a task, do you become so nervous or shaky that you do much worse than you would otherwise?
27.     When you were a child, did parents or teachers seem to see you as sensitive or shy?

HSP Scale © 1997 E. Aron (For additional information see Aron & Aron, JPSP, 1997 or email [email protected])