Stimulus-Response Inventory of Anxiousness

Abstract

The Stimulus-Response Inventory of Anxiousness (S-R Inventory of Anxiousness) is a psychological scale developed in 1962 by Norman S. Endler, J. McV. Hunt, and Alvin J. Rosenstein. Its primary function is to quantify the multidimensional nature of anxiety, specifically measuring the influence of individuals, external situations, and various response modes on the intensity of anxious reactions. The instrument was initially standardized on university students and evaluates reactions across 11 diverse situations, ranging from non-threatening daily scenarios to highly stressful or threatening environmental and social stimuli.

The S-R Inventory utilizes 14 distinct response options, which respondents rate using a 5-point Likert scale. The development of the inventory drew conceptual insights from established measures such as the Minnesota Multiphasic Personality Inventory (MMPI) and Taylor’s Manifest Anxiety Scale. Psychometrically, the scale demonstrated high internal consistency and exhibited moderate to substantial correlation coefficients when compared with the Test Anxiety Questionnaire (TAQ), thereby establishing foundational construct validity for measuring situational anxiousness.

Keywords

Psychometric Properties, Stimulus-Response Inventory of Anxiousness, Test Development, Internal Consistency, Construct Validity, Anxiety, Personality Measures, Inventories, Test Construction, Test Reliability, Test Validity.

Authors

Norman S. Endler, J. McV. Hunt, Alvin J. Rosenstein

Purpose

The fundamental purpose of the S-R Inventory of Anxiousness is to move beyond trait-based anxiety measures by assessing the complex variance in anxiety responses. It specifically aims to evaluate how different environmental or social stimuli (situations) interact with individual differences and specific response types (e.g., physiological, cognitive, behavioral) to determine the resultant intensity of anxiety.

This inventory was crucial in emphasizing the importance of the Person x Situation interaction in the study of personality and emotional states. By systematically mapping anxiousness across a variety of familiar contexts, the scale provides a nuanced understanding of when and how anxiety manifests, rather than treating it merely as a generalized, stable trait.

Construct

The primary construct measured is Anxiousness Responses, conceptualized fundamentally as situational anxiety. This construct posits that anxiety is not solely an internal disposition but rather a state triggered by specific environmental stimuli. The scale operationalizes anxiousness by measuring the intensity of affective, physiological, and behavioral reactions to 11 defined situations.

The S-R framework allows researchers to decompose the total variance of anxiety scores into components attributable to individual differences (Persons), situational differences (Situations), and the interaction between Persons and Situations, thereby providing a robust methodology for studying state anxiety in response to specific stimuli.

Validity

The validity of the Stimulus-Response Inventory of Anxiousness was supported by evidence of construct validity established through correlations with related measures. Specifically, the scale was correlated with the Test Anxiety Questionnaire (TAQ).

• For the University of Illinois sample, the correlation coefficient with the TAQ was reported as .66, indicating a substantial relationship between situational anxiousness measured by the S-R Inventory and anxiety related specifically to academic testing.
• For the Penn State sample, the correlation coefficient with the TAQ was .44, suggesting a moderate correlation. These findings support the interpretation that the S-R Inventory measures a construct closely related to, but broader than, test-specific anxiety.

Reliability

The scale demonstrated excellent internal consistency across different testing populations, suggesting high homogeneity among the items designed to measure anxiousness responses.

• For the University of Illinois sample, the internal consistency, measured by Cronbach’s alpha, was exceptionally high at .97.
• For the Penn State sample, the Cronbach’s alpha value was .95, confirming the reliability and coherence of the inventory across different undergraduate groups. These high alpha values indicate that the scale items reliably measure the same underlying construct of situational anxiousness.

Factor Analysis

No formal factor analysis results were indicated or reported in the foundational documentation sourced for this entry. Therefore, the underlying factor structure of the 11 situations and 14 response options has not been explicitly analyzed or defined through typical exploratory or confirmatory factor analytic methods in the initial development phase.

Instrument

Test Type: Inventory/Questionnaire

Format: The instrument is composed of 11 situational pages. Each situation is followed by 14 specific response options (totaling 154 potential items). Responses are rated on a 5-point Likert scale, where 1 signifies “Not at all” and 5 signifies “Much faster” or the highest intensity of the response mode.

Language Available: English (Original development location: United States)

Population Group: Human

Age Group: Adulthood (18 years & older); Young Adulthood (18–29 years)

Population Details: Undergraduate students

Test Methodology: The scale was designed to evaluate responses to both social and non-social situations. The method utilized intuitive sampling of familiar scenarios and physiological/behavioral responses to ensure high relevance and clarity for the target population. This methodology allows for the comprehensive capture of various response dimensions of anxiety, including self-reported feelings, observable behaviors, and somatic reactions.

Keywords

Anxiety Measurement, Situational Anxiety, Trait vs. State Anxiety, Psychometric Properties, Test Anxiety, S-R Inventory of Anxiousness, Test Construction, Personality Assessment, Undergraduate Students.

Authors

Author ORCID Identifier: Not available

Affiliation Email addresses: Not available

Correspondence Address: Not available

Permissions & Fee and Test Year

Test Year: 1962

Permissions: The scale may be used for Research/Teaching purposes, suggesting accessibility for academic and educational applications.

Fee Structure: Fee information is not specified in the primary source documentation.

Reference’s

• Endler, N. S., Hunt, J. M., & Rosenstein, A. J. (1962). An S-R inventory of anxiousness. Psychological Monographs: General and Applied, 76(17), 1–33. The original publication can be accessed via the following DOI: https://doi.org/10.1037/h0093817.

Items of the Stimulus-Response Inventory of Anxiousness

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

1. You are just starting off on a long automobile trip.
2. You are going to meet a new date.
3. You are going into a psychological experiment.
4. You are crawling along a ledge high on a mountain side.
5. You are getting up to give a speech before a large group.
6. You are going to a counseling bureau to seek help in solving a personal problem.
7. You are starting out in a sail boat onto a rough sea.
8. You are entering a competitive contest before spectators.
9. You are alone in the woods at night.
10. You are going into an interview for a very important job.
11. You are entering a final examination in an important course.