  Contactlike nonstandard interactions can be revealed only through deviations
of observables from the standard model predictions. We consider a number of
such nonstandard scenarios, and discuss their identification as sources of
deviations in fermion-pair production processes at the International Linear
Collider, if they were observed. We emphasize the role of e^- and e^+
polarization in enhancing the identification reaches.

High Energy Physics - Phenomenology