What is PsychoPy?

PsychoPy is a Python-based platform for designing and executing experiments involving stimulus presentation and response collection. It supports both in-lab and online studies, making it a versatile tool for behavioral and cognitive research. Users can create experiments using its graphical interface (Builder), write custom Python scripts (Coder), or combine both methods.

How Does PsychoPy Work?

1. Experiment Design: Create experiments using the Builder (drag-and-drop) or Coder (Python scripting) interfaces.
2. Stimulus Presentation: Present visual, auditory, or multimedia stimuli with precise timing.
3. Response Collection: Gather responses from various input devices like keyboards, mice, or specialized hardware (e.g., EEG, eye trackers).
4. Data Analysis: Export data for further processing in statistical tools like SPSS or Python.

Why Use PsychoPy?

• Free & Open Source: No cost for use, with an active community contributing to its development.
• Flexible: Supports complex experimental designs and a wide variety of stimuli.
• Cross-Platform: Runs on Windows, macOS, and Linux.
• Online Compatibility: Allows experiments to be run online via Pavlovia.
• Precise Timing: Ensures accurate stimulus presentation critical for psychophysics and neuroscience.

Key Features

Stimulus Presentation

• Wide variety of stimuli: images, text, movies, sounds, gratings, random dots.
• Multi-monitor support and automated monitor calibration.
• Real-world units (e.g., degrees of visual angle).

Experiment Design

• Builder Interface: Drag-and-drop panels to design experiments without coding.