The most tested park chair hypothesis revolves around the idea that the arrangement and design of public seating significantly influence social interaction and space utilization. Researchers have repeatedly examined how people choose seats in parks, often finding that individuals prefer benches facing pathways or scenic views, while avoiding overly isolated or crowded spots.

One prominent theory, the "sociopetal vs. sociofugal" hypothesis, suggests that certain chair arrangements encourage interaction (sociopetal), while others discourage it (sociofugal). For example, circular or facing benches promote conversation, whereas linear, back-to-back seating reduces engagement. Studies also show that movable chairs increase user satisfaction by allowing personalization of space.

This hypothesis has profound implications for urban planners and designers, emphasizing the need for intentional seating layouts to foster community or provide solitude, depending on the park's purpose. The ongoing research continues to refine our understanding of human-environment dynamics in public spaces.