This image comes from an IQ test app called TEST QI. I cannot understand why the yellow one is the right choice. Any idea?
Think this is it:
A sequence of infinitely long square/not square is moving across the board from top to bottom, left to right in backwards diagonals so you have the squares right.
A sequence of circle-no circle-circle (just those 3) is moving horizontally top to bottom left to right 1 space at a time. Often they are behind the squares. Its right side starts in box 3. As they move alternate between open and closed every other move. The open circle alternates on it's first move, the closed circle on it's 2nd move, then they alternate every other move after the initial alter. (i.e. an odd even pattern)