These Strawberries Aren't Red!

TL;DR

An optical illusion of gray strawberries is perceived as red due to the brain's color constancy, which interprets colors based on what is known about the world.

Transcript

First it was the Dress, then a year later it was that Adidas jacket. But the latest optical illusion to sweep the internet is a photo of strawberries that appear red, even though the picture doesn’t contain any red pixels. It was created by a Japanese psychology professor named Akiyoshi Kitaoka, who studies visual illusions. And he’s made a hobby o... Read More

Key Insights

• 🧠 Optical illusions can reveal how the brain processes and interprets visual information.
• 🧠 Color constancy is the brain's mechanism to maintain object colors despite variations in lighting.
• 👨‍🔬 Scientists have debated the existence of sex pheromones in humans, with recent research suggesting little evidence to support their existence.
• ❓ Perception of attractiveness and compatibility is not significantly influenced by the previously proposed sex pheromones.

Questions & Answers

Q: How does the optical illusion of gray strawberries appearing red work?

The illusion occurs because our brain uses color constancy to interpret the strawberries as red, despite the absence of red pixels in the image. This phenomenon is similar to how we perceive the Dress picture.

Q: What is color constancy and how does it work?

Color constancy is the brain's ability to interpret object colors based on the knowledge of the world. It allows us to see a white piece of paper as white, regardless of the light source reflecting off it.

Q: Do humans have sex pheromones?

The existence of sex pheromones in humans is still uncertain. While previous studies suggested the presence of chemicals like androstadienone and estratetraenol, a recent study found no statistically measurable effect on participants' perception of gender-neutral faces.

Q: Can body odor influence attraction?

Body odor is a potential area for researching sex pheromones, but the recent study showcased that the previously identified chemicals did not affect participants' perception of attractiveness or faithfulness.

Summary & Key Takeaways

• A Japanese psychology professor creates an optical illusion by digitally removing red from a photo, yet the strawberries appear red due to color constancy.

• Color constancy is the brain's ability to interpret the colors of objects based on the knowledge about the world.

• Objects don't change color; rather, it is the surrounding light that affects how we perceive them.