Using randomly moving dots, what is the minimum percentage of dots that needs to move in a particular direction for this direction to be detected?

Question

Quizplus · Accepted Answer

The minimum percentage of dots that needs to move in a particular direction for this direction to be detected is typically in the range of 3-5%. This threshold varies depending on the specific conditions of the experiment and the observer, but it generally falls within this range for humans to perceive coherent motion direction.

Using Randomly Moving Dots, What Is the Minimum Percentage of Dots