Risk Survey Experiment

A web-based risk survey experiment for behavioral research.

Quick Start

1. Install dependencies:

   npm install

2. Set up environment:

   • Create .env file with your MongoDB connection string:

   MONGODB_URI=your_mongodb_connection_string
   

3. Run the experiment:

   node server.js

   • Open http://localhost:3000 in your browser

Trial Generation

Generate new trial configurations:

python generate_trials.py

Data Structure

The experiment saves 15 fields per trial:

• participant_id, trial_number, bar_size_condition
• choice (risk/safe/timeout), confidence (0-100 or NaN)
• risk_probability, risk_reward, safe_probability, safe_reward
• risk_position, safe_position, ev (same/safe/risky)
• bar_choice_time, confidence_choice_time, trial_id

Files

• server.js - Express server with MongoDB integration
• public/js/experiment.js - Main experiment logic
• public/css/styles.css - Styling
• public/config.json - Experiment configuration
• public/full_trials.csv - Trial data
• generate_trials.py - Trial generation script