Most of the time, the works on the sensory systems in psychophysics concern simple conditions and it is possible to describe exactly the effects of experimental manipulations. Consequently, numerous works on the discrimination or the categorization of intervals consist in the presentation of simple intervals, as opposed to the presentation of sequences of intervals. Nevertheless, there is literature on the discrimination of sequences of temporal intervals, and it happens that this literature reveals something very important: generally, increasing the number of presentations of intervals increases the capacity to discriminate them.