Stereo-perception appears to be mediated by at least two systems: a transient system that processes stimuli presented briefly and a sustained one that processes stimuli presented for longer durations. In this paper we investigated the tuning of the transient-stereopsis system to stimulus orientation. Narrowband-gabor targets with a constant envelope size (Gaussian standard deviation of 1 degree...

Using the standard map as a model problem we have investigated the method of the twist angles (Contopoulos and Voglis 1997) to distinguish islands tori and weak chaotic orbits. In the case of regular orbits, we have shown the relationship with the frequency studying in particular the case of second order resonances. We have tested the sensitivity of the method comparing it to the frequency anal...