intro_task

An oTree app for session setup, informed consent, welcome pages, and final payment display. Designed to be used as the first and last app in an oTree experiment sequence — handles participant variable initialization from CSV lookup files, consent forms, and end-of-session payment summaries.

Features

• CSV lookup files: Load per-participant configuration (treatment assignments, locale, etc.) from CSV files matched by participant_label
• Informed consent: Configurable HTML consent forms
• Welcome page: Customizable welcome message with session end time display
• Start time enforcement: Prevents subjects from continuing before a scheduled start time
• Final payment page: Aggregates and displays payment results across all tasks in the session
• Dual-purpose: Acts as both intro (consent/welcome) and final (payment display) app depending on the app name

Setup

Use as bookends in your app_sequence:

SESSION_CONFIGS = [
    dict(
        name='experiment',
        app_sequence=['intro_task', 'risk_task', 'beliefs_task', 'final_page'],
        num_demo_participants=1,
        lookup_file='default',
    ),
]

Place config files in configs/:

• configs/lookup_files/ — CSV files with participant variables
• configs/consent/ — HTML consent forms
• configs/welcome/ — HTML welcome messages

Authors

Brian Albert Monroe, J. Todd Swarthout