Please read this:
If you want to decide if you should learn this visual thinking technique  ask  yourself if  you are naturally very good at  keeping track of the main  theme  of a story, document  or presentation and can easily select  keywords which  represent  of main and  subtopics. If so can you visually  link these main  and sub topics in your mind in such a  way that you can  draw conclusions,  remember the essence from your and other's  viewpoint and if you can  quickly oversee what the  relationships between  the topics  are if they  exist. If you can do this you don't need to learn  visual thinking you already  are a visual thinker!
Assignment:
  • Try again the exercise with the columns of step 1 but before you start  think about the objective and audience (this why you discovered  differences with someone else when comparing the 2 columns)
Then read this:
To support this visual thinking process you first need to learn  a little  bit  about how your brain works. Mindmapping is  a technique that  supports  visual thinking by stimulating the cooperation between your  left and right  half of your  brain.  Your left brain is sometimes called your  analytical brain  because it is the seat  of analysis, speech, structure,  language,  sequence,  calculations, ratio, order, logic,  numbers, details,  lines, rules and your  right side of your brain is the seat of  'the whole  picture', color, dreams,  3D, images, music, icons, patterns, rhythm,  stories,  simultaneity. Left  analyses bit by  bit everything that is  registered, right simultaneously  builds 'the whole picture'. Left is text,  right context. To help you  think  visually it is  worthwhile to learn mind  mapping as a writing technique. If  you normally need about 8  pages to  take  notes of a subject you could get  the same information on just one  page  if you can mind map. The big  advantage is that  you can see in  one graphic at one  page all the  information including all the  relationships. In a linear document if there  is  a relation between a topic  in page 2, 5 and 8 you must turn all pages. 
Assignment:
  • Now try to make a mindmap of all the text you have read using the  rules in Step 2
  • Only after you tried this check out Step 5