The feeling that a person gets when they know the information, but can not remember a specific detail, like an individual's name or the name of a place is described as the ''"tip-of-the-tongue"'' experience. The ''tip-of-the-tongue'' experience is a classic example of '''blocking'''"blockin", which is a failure to retrieve information that is available in memory even though you are trying to produce it.<ref name = Schachter2011>{{cite book|last=Schacter|first=Daniel L.|title=Psychology Second Edition|year=2011|publisher=Worth Publishers|___location=41 Madison Avenue, New York, NY 10010|isbn=978-1-4292-3719-2|pages=[https://archive.org/details/psychology0000scha/page/246 246]|url=https://archive.org/details/psychology0000scha/page/246}}</ref> The information you are trying to remember has been encoded and stored, and a cue is available that would usually trigger its recollection.<ref name = Schachter2011 /> The information has not faded from memory and a person is not forgetting to retrieve the information.<ref name = Schachter2011 /> What a person is experiencing is a complete retrieval failure, which makes '''blocking''' especially frustrating.<ref name = Schachter2011 /> Blocking occurs especially often for the names of people and places, because their links to related concepts and knowledge are weaker than for common names.<ref name = Schachter2011 /> The experience of blocking occurs more often as we get older; this "tip of the tongue" experience is a common complaint amongst 60- and 70-year-olds.<ref name = Schachter2011 />
