This study compared biofeedback assisted cue-controlled skin temperature training with skin temperature biofeedback training in subjects attempting to raise the digital skin temperature of their dominant hand. In addition to classification according to training, the subjects were also divided into two diagnostic groups. One group was composed of subjects with cold hands and Raynaud's disease while the other group consisted of nonRaynaud's disease cold handed subjects. The treatment and diagnostic groups were compared along the dimensions of amount of posttreatment digital skin temperature change and degree of generalization of digital skin temperature control to a cold room challenge task.