"The function’s strength is determined by the volume of information which it can process."
according to an article on http://en.socionics.ru/
"In socionic language it will look the following way: for weak functions we have channels of lesser capacity that is why our weak functions process less information that the strong ones. How is their weakness manifested? Information which is not full is not usually true enough. Making decisions connected with the spheres of processing by weak functions we more often make mistakes and have to turn to people for help and advice. There is nothing bad or humiliating in that for us, we, in our turn, can give advice from our strong functions. "
"The volume of information processed by strong functions is enough for a person’s own needs and also for transferring it to other people and society. While weak functions process relatively small volume of information. The quality of the final product of weak functions is lower. Such product can rarely interest the people around for there are always people in society with the same functions in strong positions."
Strong functions usually manifest themselves in a very easy and natural way, it just happens, that’s all. They are not for “showing off”, their owner is just confident in them. And on a weak function, even well worked at, we can see certain tension, certain stiffness, we can often come across excuses here.