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Development of a Direct Observation Instrument to Measure Environmental Characteristics of Parks for Physical
Journal of Physical Activity & Health
|August 24, 2017
Summary
A new direct observation instrument reliably and validly assesses park features related to physical activity. This tool is crucial for understanding environmental influences on public health and promoting active lifestyles.
Area of Science:
- Environmental Health
- Public Health Research
- Urban Planning
Background:
- Park characteristics significantly influence physical activity levels.
- Direct observation is a key method for assessing environmental factors in public spaces.
- Understanding park features is vital for promoting community health.
Purpose of the Study:
- To develop a direct observation instrument for assessing park characteristics.
- To evaluate the reliability (inter-observer agreement) of the instrument.
- To assess the validity (rater agreement with a gold standard) of the instrument.
Main Methods:
- An 181-item instrument was developed based on domains: features, condition, access, aesthetics, and safety.
- Fifteen pairs of trained observers conducted simultaneous observations in two parks.
- Each observer pair assessed two target areas within each park.
Main Results:
- Overall domain reliability reached 86.9% and geographic area reliability was 87.5%.
- Overall domain validity was 78.7% and geographic area validity was 81.5%.
- Objective items demonstrated the highest reliability and validity.
Conclusions:
- The developed instrument shows generally good inter-rater reliability and validity for park assessments.
- Validity was slightly lower than reliability, suggesting areas for refinement.
- Objective items are most reliable; time-sensitive and subjective items require specific measurement considerations.
