Local methods (Hearst, 1997;Ferret et al., 1998;Hernandez and Grau, 2002;Claveau and Lefèvre, 2011) locally compare adjacent fixed size regions, claiming a boundary when the similarity between the adjacent regions is small enough, thus identifying points of high lexical disruption.
transcripts significantly differ from written texts: no punctuation signs or capital letters; no sentence structure but rather utterances which are only loosely syntactically motivated; presence of transcription errors which may imply an accentuated lack of word repetitions.