The investigators aim to compare how walking in different outdoor environments influences depressive symptoms among college students. Specifically, the investigators will assess:
1. walking in an urban environment (like a busy city street),
2. walking in a natural environment regularly (e.g., walking without specific guidance), and
3. walking in a natural environment with guided interaction prompts (e.g., noticing birds, listening to sounds, touching flowers).
Standardized questionnaires will measure changes in depressive symptoms, anxiety, affect, cognitive flexibility, nature connection, and Presence across all three groups.
The investigators will also explore potential mechanisms behind any observed effects, including interaction patterns, presence, cognitive changes, and emotional responses to the different environments.
