are 3 yellow-blue balls located in C2,
H3, and E6 (<- highlight with the mouse).
In visual perception, search is very difficult when you have
to find an object with a combination of two SAME attributes
(colors), than with more complex attributes (color + form).
0? - On further reflection - at least 3?
There are no yellow and blue balls, only red and yellow and
red and blue balls.
Zero yellow and blue balls.
encouraged to expand and/or improve this article. Send
your comments, feedback or suggestions to Gianni
A. Sarcone. Thanks!