1. A method for detecting synchronicity between several digital measurement series using a computer, comprising the steps of: a) using an order to indicate a number of measurement series taken into account which are to be examined for synchronicity; b) calculating an occurrence probability P.sub.j for different binary combination K.sub.j such that ##EQU5## c) determining a discriminating statistic .LAMBDA. depending on the order given in step a); d) forming a null hypothesis, P*, such that ##EQU6## e) looking up a perturbation variable w such that EQU .LAMBDA.(P*)=0 W.sub.min and W.sub.max being defined such that EQU 0&lt;P* (1.sub.A)&lt;1.A-inverted.A with the constraint ##EQU7## f) determining surrogate data records, which are arbitrary instances of a condition of the null hypothesis P*: g) determining, for establishing existence of synchronicity, a significance S such that ##EQU8##