SOCR Color Optical Illusion Survey

This voluntary survey collects anonymous feedback from all SOCR users (instructors, learners, developers, and the broader community) regarding their experiences observing the following optical illusions under the color category. There are 7 examples in this survey! Please observe each optical illusion carefully and complete the following survey questions as many as possible. Thank you for your feedback and time!

Gender Please identify your gender

Male
Female

Age (years) Please select your age (you must be over 18)

What numbers are seen in the picture below? Please select one of the 4 options for all 4 figures.

A: 29, B: 45, C: __, D: 26
A: 70, B: __, C: 5, D: __
A: 70, B: __, C: 5, D: 6
A: 70, B: __, C: 5, D: 2

Pacman Illusion: Which direction do you see the disappearance of purple dots? Instruction: First stare at the picture for 30 seconds.

Clockwise
Counterclockwise
No purple dots disappear

Pacman Illusion: Do the purple dots disappear based on the path of green dot? Instruction: First stare at the picture for thirty seconds

Yes
No
I do not see the green dot

Pacman Illusion: How long do you stare at the picture to see the green-dot?

Phantom Dots: Do the white dots between each blue blocks turn into black? If dots turn into a different color, please specify the color.

Yes
No
Other:

After image: Stare at this picture for around 30 seconds. If you look away from the computer monitor and stare at the wall, do you see an after image on the wall?

After image: How many birds did you see from the after image?

< 5
5-10
> 10

Checker shadow: Do you think block A and block B have the same color?

False Color: Do you think the color of the 10 boxes in the first row equal to the 10 boxes in the second row?

Disappearing dot: Do the center little blue dot disappear? Instruction: Stare at the picture for around thirty seconds before answering the questions

Disappearing dot: Does the green bigger circle change size after staring at the picture for around thirty seconds?

UCLA IRB approval