Activity Two - One drawing, two different opinions

I was a bit stumped in regards to how I can cover this activity, because up to now, I haven't been able to find anything.  That is, until I stumbled upon this image this morning and while it's an incredibly complicated paradox to explain, there is a simplicity in its paradox - both sides of the image need to be explored!
Brian Ridgley

  

Two men, one of them pointing to the same objects from the left, believing that he's seeing four different objects, while the one on the right is pointing to the same objects and seeing three.  Let's look from the perspective of the gentleman on the left first.  

He sees four objects, and he sees four objects from his perspective because of the way they are drawn together.  From his angle, they are four wooden blocks laid side by side.

The gentleman on the right, on the other hand, sees three different objects from the way they are drawn separately, and while they are laying side by side, they're not touching each other.

The thing about such images is that if you look at it from a centrist position, you can see exactly how it's drawn to look like an optical illusion.  To stand on one side or the other only is to capture the limited view, to not be prepared in how the objects are seen from the other side, or take in the other person's opinion in regards to why it's seen that way.  The time it takes for each person's opinion to be recorded will depend on how long that opinion is maintained.  Until the bigger picture is seen, each opinion will never change.  It's not to say that either one is wrong, but because of how this illusion is drawn, neither of them are actually right either, and here is why we have a paradox.

Another example I have is this one:

Half full or half empty 

One glass, two differing opinions.  The gentleman on the left is seen as an optimist, because the glass is half full, while the gentleman on the right is seen as a pessimist, because the glass is half empty.  This is a psychological difference of opinion, as the optimist is always seen to always uphold the view of everything being right and always working out, while the pessimist is always seen to always uphold the view of everything being wrong and never working out.  From a centrist perspective, it can also be seen as an incomplete drink that the person drinking it will eventually come back to and finish it off.  To sum up, it's a glass with fluid in it.  Why does the psychology enter into it?
This interesting blog gets to the core root of human thinking and feeling in that we are subjective and Shakespeare sums it up succinctly with this quote:
"There is nothing good or bad, but thinking it makes it so."
Psychology today

While I'm no psychologist, it's fair to say that artistic expression is linked to the human psyche, and how we think reflects in our work.

Five activities completed!  The next activity is the seventh, while I will get one of my family members to procure an object for me later today.