"We're running an experiment in which people are reading stories and responding to a auditory probe. The probes are working just fine but all of our data in the resulting probes.sav file shows up as -1 for the var_t, var_k, and var_r variables. We've tried different probe parameters with no success. Any advice is appreciated."

I am having the same problem. The tones are playing and being responded to, but the var_t, var_k, and var_t variable show up as -1s. Any help would be greatly appreciated.