Grey Matter
How the tests work
The individual tasks: digit span, mental rotation, thinking types. What each one is for and what it can and cannot show.
How the tests work
The 8 thinking types, and why most “types of thinker” lists disagree
Three questions, eight answers. Why the lists never agree on how many kinds of thinker there are, and what a type is actually telling you.
How the tests work
Why a mirror image is so hard to reject
b and d are the same shape. So are the figures in a rotation test. Your brain files them together on purpose, and learning to read means partly undoing that.
How the tests work
Mental rotation: the one cognitive skill that reliably improves with practice
Decision time rises in a straight line with how far the figure has been turned. That line is the finding, and it says something odd about what your head is doing.
How the tests work
Digit span: the 60-second memory task, explained
Repeating digits back tests storage. Repeating them backwards tests manipulation. The gap between your two scores is the interesting part.