Drawing on the Right Side of the Brain

I am currently reading Drawing on the Right Side of the Brain. I don’t know what to make of the stated research, however, the drawing exercises are interesting.

Here are my results from the drawing exercises.

Hand Sketch
Hand Sketch

Guy on a Horse
Guy On A Horse

Picasso Stravinsky Portrait Line Drawing
Picasso Stravinsky Portrait

Spiderman
Spiderman