Saint Louis Environment and Physical Activity Instrument

Abstract

The Saint Louis Environment and Physical Activity Instrument (SLEPAI) is a robust, self-administered questionnaire designed to provide a detailed assessment of the perceived environmental and social factors that influence an individual’s engagement in physical activity. Developed for use in epidemiological and public health research, the instrument systematically measures various domains including self-reported walking behavior, the availability and quality of places for walking, perceived barriers to activity, the adequacy of neighborhood infrastructure for both walking and cycling, and attitudes toward relevant policies. Furthermore, it assesses social support for physical activity, community assets, and measures of sedentary behaviors.

Keywords

Physical activity, environmental influences, neighborhood infrastructure, walking behavior, sedentary behaviors, policy attitudes, health psychology, built environment, public health.

Authors

Ross Brownson, Ph.D., Jen Jen Chang, Ph.D., MPH, Amy Eyler, Ph.D.

Purpose

The primary purpose of the Saint Louis Environment and Physical Activity Instrument is to quantify the perceived environmental influences on physical activity levels among community residents. The scale assists researchers and public health officials in identifying specific environmental and social barriers or facilitators within a geographic area, such as St. Louis, that impact active transportation and leisure-time physical activity.

By measuring subjective perceptions of the local environment—ranging from sidewalk quality to feelings of safety and access to parks—the SLEPAI provides critical data for developing targeted interventions aimed at modifying the built environment to promote healthier lifestyles and reduce the prevalence of inactivity.

Construct

The SLEPAI is a multi-dimensional instrument rooted in the socio-ecological model of health behavior, asserting that individual behaviors are heavily influenced by their surrounding environment. The instrument measures several complex constructs concurrently, ensuring a holistic view of determinants of activity.

Key constructs assessed include Active Transportation Infrastructure (e.g., quality of walking paths and cycling lanes), Perceived Safety and Aesthetics (how pleasant and safe the environment is for activity), Social Support (encouragement from family and friends), Community Assets (availability of resources like parks and recreation centers), and specific measures of Sedentary Behaviors. This comprehensive approach allows for the identification of multiple leverage points for intervention.

Validity

While specific detailed documentation regarding the formal validation studies (e.g., construct validity, criterion validity) of the Saint Louis Environment and Physical Activity Instrument was not provided in the primary source text, instruments of this nature typically undergo rigorous validation processes, often involving comparisons with objective measures of the environment (e.g., GIS data on sidewalk completeness) and correlations with established physical activity measures (e.g., accelerometer data or IPAQ scores).

The breadth of domains covered suggests strong face validity, as the instrument addresses nearly all known environmental determinants hypothesized to influence physical activity behavior in urban settings.

Reliability

No specific reliability statistics (such as test-retest reliability or internal consistency measures like Cronbach’s Alpha) were detailed in the source content. For a complex questionnaire covering diverse behavioral and perceptual domains, subscales would typically be assessed individually for internal consistency. Future academic entries or accompanying documentation would need to provide these psychometric details to confirm the tool’s stability and consistency across repeated administrations or within its specific subscales.

Factor Analysis

Information regarding the factor structure or confirmatory factor analysis (CFA) of the SLEPAI was not provided in the referenced material. Given the wide range of constructs assessed—from infrastructure to social support and policy attitudes—it is highly likely that the instrument is structured around several distinct, empirically derived factors. A comprehensive factor analysis would be essential to confirm that the subscales (e.g., “Neighborhood Walking Infrastructure” or “Barriers to Activity”) are statistically independent and measure the intended latent constructs effectively.

Instrument

Test Type: Self-report questionnaire / Environmental perception survey

Format: Typically administered via paper-and-pencil or interview format

Language Available: English (Primary language of development)

Population Group: General community residents

Age Group: Adults (typically 18 years and older)

Population Details: Primarily used in studies focused on environmental determinants of health behavior, often targeting residents within specific urban or metropolitan areas, such as the St. Louis region.

Test Methodology: Utilizes structured questions to capture subjective perceptions of the local physical and social environment, alongside self-reported behavioral data related to walking, cycling, and sedentary time.

Keywords

Built environment, public health surveillance, active transportation, physical activity measurement, environmental determinants, community assets, policy attitudes, social support, Missouri.

Authors

Author ORCID Identifier: Not specified in source data.

Affiliation Email addresses: Not specified in source data.

Correspondence Address: Correspondence generally directed toward the Department of Epidemiology and Biostatistics or Public Health, Washington University in St. Louis or similar affiliated institutions where the authors were based during development.

Permissions & Fee and Test Year

The instrument is often utilized in academic research settings. Users should contact the primary authors (Brownson, Chang, or Eyler) for formal permission requests, licensing details, and current usage fees, if applicable. The exact test year is associated with the publication of the key reference, suggesting development and initial use occurred prior to or around the time of the publication of the key reference.

Reference’s

The primary citation for the instrument is:

• Brownson, R. C., Chang, J. J., & Eyler, A. A. The Saint Louis Environment and Physical Activity Instrument.

The original PDF of the survey instrument can be downloaded here: slu_survey_0

Items of the Saint Louis Environment and Physical Activity Instrument

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way. As the specific item text was not provided in the source, the domains assessed by the questionnaire are listed below, reflecting the instrument’s content scope:

• Detailed assessment of walking behavior
• Places to walk
• Barriers to being physically active
• Neighborhood infrastructure for walking and cycling
• Perceptions about places for walking
• Social assets
• Social support for physical activity
• Community assets
• Policy attitudes
• Sedentary behaviors