 20% of the time "thiy" is used, speakers can repair the problem in time and continue without further disruption, but 80% of the time they deal with the problem by pausing, repeating the article, repairing what they were about to say, or abandoning the original plans for speech altogether.A similar study by the same researchers examined ‘uh’ and ‘um’ in spontaneous speaking.Like "thiy" and "thuh", "um" and "uh" signal varying degrees of delay, which "um" creating a major pause and "uh" creating a minor one.