This app is a convenient tool for easily experimenting with the Müller-Lyer illusion. No special equipment or paper is needed—just your smartphone to explore the fascinating world of optical illusions.

Key Features:

Incredibly easy to use!
Perfect for school lessons and scientific experiments.

Record illusion experiments in sets of 10 trials
Ideal for group projects and individual research.

Scientific data recording
Simply tap where the horizontal lines of outward- and inward-facing figures "appear equal"! The recorded illusion magnitude (in pixels) is valuable for comparisons in future experiments.

Randomized display of ascending and descending series
The order of ascending and descending series is randomized to ensure unbiased data collection.

Clear display of initial conditions
Starting positions and other conditions are clearly displayed at the beginning of each trial, making it convenient for analysis and retries.

Data securely saved on your device
All experiment results are safely stored on your smartphone. Managing your data is simple, and retrying experiments is a breeze!

Learn while having fun!
Dive into the wonders of optical illusions while enhancing your observation and analytical skills. This app is perfect for students, educators, psychology enthusiasts, and anyone curious about the science of perception.

Download now and take your first step into the world of science!