Contingent self-stimulation for stuttering.

In this investigation, 10 adult stutterers were given time-out contingent on each stuttering. Ten other stutterers administered themselves time-out contingent on each stuttering. Stutterers in both time-out conditions evidenced marked reductions in stuttering compared with spontaneous speaking base rates. Stutterers who presented their own time-outs for stuttering, however, showed significantly less extinction of reduced stuttering following the time-out period, and significantly greater generalization to a telephone speaking situation, than did stutterers who were given time-out by an experimenter.