Challenges in conducting natural experiments in parks-lessons from the REVAMP study

Area of Science:

• Urban planning and public health
• Environmental psychology
• Built environment and physical activity

Background:

• The built environment significantly influences physical activity levels.
• Parks are key public spaces for recreation and exercise.
• Limited evidence exists on the impact of park refurbishment on physical activity.

Purpose of the Study:

• To discuss challenges in conducting natural experiments on park refurbishment.
• To provide insights for designing effective future evaluations of park interventions.
• To inform urban planning for promoting active living through park modifications.

Main Methods:

• Utilizing the Recording and EValuating Activity in a Modified Park (REVAMP) study as a case example.
• Conducting a natural experiment evaluating a large park modification in Victoria, Australia.
• Analyzing challenges in organizing and executing natural experiments in real-world settings.

Main Results:

• Natural experiments provide unique data on large-scale built environment changes.
• External factors beyond study control complicate natural experiment execution and data quality.
• Effective natural experiments require robust design, flexibility, and adequate funding.

Conclusions:

• Natural experiments are valuable for evaluating built environment interventions like park refurbishments.
• Addressing extraneous factors and ensuring flexibility are critical for successful park evaluation studies.
• Collaboration with partners and sufficient funding are essential for navigating the complexities of natural experiments.