After reading some more and thinking a lot about it, I’m beginning to understand the right sided thinking and why it seems to be much more easy for me.

It turns out that I didn’t do my last two drawing in the way the book expected. With the Faces and vases drawing you were supposed to name the parts of the face you were drawing in the left face. Then draw two horizontal lines and then draw the right face.
It’s quite possible that this drawing is almost impossible if you do it that way.
But of course I didn’t. I don’t like thinking in words. I do it much to often and get very tired. Especially when I’m drawing I try to only think in pictures.
My way of drawing a face is think of a face in silhouette and trace it. The tracing part still doesn’t work that well. But it is getting easier.
With the right face I switched to the vases view and there was nothing to it.

It isn’t completely clear to me whether people were supposed to recognize the subject of the up side down drawing. For most people trying to draw an up side down picture is so taxing that they stop talking inside their mind.
The point being that talking is an ability of the left side of the brain and drawing is an ability of the right side. Drawing up side down is so taxing that the left side gives it up and leaves it up to the right side to do the job.

The book describes a special feeling people are supposed to have while they are doing this kind of drawings. You should feel more alert, more relaxed and not notice the passing of time.
I can’t say that I experienced a special feeling while doing the up side down drawing.
I do have those feelings when I concentrate on thinking in pictures. Especially noticing the passes of time seems to be something that is closely related to thinking in words.
I remember from my youth, when I primarily thought in picture, that I had very poor sense of time. But of course back then they called it day dreaming.

Could it be that one of the differences between autistic and other people is that autistics make more or better use of the right side of their brain?
I don’t know.
I do know that autistics are supposed to have a different thought process. I can think in words but it is a lot of work. Very taxing.

Any way. The book advices to do several up side down drawings before going on with the next assignment.
This was supposed to be a horse with a knight. But when I copy I always enlarge. So by the time I got to the head there was no room left for the knight.
I drew the horse up side down and then turned the page to draw in the shades.

Considering that this is the first time in my life that I’v drawn any kind of animal. I think it’s not to bad. (Except for the right fore leg.)

Horse without a knight