They say that tickling someone has two main impacts on the brain. One, where it causes such a feeling of annoyance, similar to feeling an insect on your skin, and two, the reaction of laughter when being presented with a form of danger.
If we dig deeper into the biology and psychology surrounding tickling, we can understand why The Ministry has this as one of its main procedures. The reaction of laughter, known professionally as Gargalesis, is the product of certain nerves being touched and a person's brain not knowing how to react to this. In many a case, a person when tickled is forced into submission due to their reaction, which ends up in uncontrollable laughter that is often hiding their real uncomfortable feelings.
The Ministry followed on from hypnotherapy with The Tickler and found a higher correction rate in a number of days. Placing a subject in a room with various means of ticklish objects allows The Ministry to control their laughter. After say an hour of tickling, the subject will overcome their bad thoughts on the feeling, and be filled with an overwhelming sense of happiness. So far The Ministry has not found fault with this method (unlike some other forms). I have found that the Tickled subjects are the least compliant out of them all, but that is to be expected with a practice that is usually only temporary. Compare this to The Inoculated subjects, where their body will store the method, and this is understandable.
