For a test read the following from "Brain and Personality" by W. Hanna
Thompson. Follow the idea just suggested. Make a test, read slowly,
form a mind's eye picture, think about it, and then tell the thought as
nearly as possible to some one. All this may take some time and effort
at first but the use of these ideas will quickly form the mental habit.
Once reading a lesson in this manner will give better results than many
careless repetitions.
"In some fishes, such as the carp, when the ganglia, which corresponds
to the cerebral hemispheres (brain) are experimentally removed, they do
not seem to mind it at all, for even then there is little, if anything,
to distinguish them from perfectly normal animals. They maintain their
natural attitude and use their tails and fins in swimming with the same
vigor and precision as before. They not only see, but are able to find
their food. If worms are thrown into the water where they are swimming
they immediately pounce upon them. If a piece of string similar in size
to a worm is thrown in, they are able to detect the difference and they
drop it after having seized it. They even, to some extent, distinguish
colors for when some red and some white wafers are thrown into the
water the fish almost invariably select the red in preference to the
white.
"It is much the same with a frog. If care be taken to keep the frogs
alive after the removal of their cerebral lobes until they are quite
recovered from the injury, brainless frogs will behave just like full
brained frogs under like circumstances. They will crawl under stones,
or bury themselves in the earth at beginning of winter, and after the
period of hibernation is over, they will come out and diligently catch
flies which are buzzing about in the vessels in which they are kept."