JoVE Journal
Behavior
Behavior
A subscription to JoVE is required to view this content. Sign in or start your free trial.
Chapters
Summary
This paper discusses the methodology used to reveal the 'Uncatchable Smile' illusion in Leonardo da Vinci's La Bella Principessa portrait. A combination of three methods was used (inter-observation, structured interviews, and psychophysical experiments), which led to an investigation that shaped itself without prior beliefs, thus reducing potential researcher bias.