This was a controlled study of the efficacy of two forms of therapy on upper limb functions of hemiparetic patients--one heavily behavioral and the other based on Bobath therapeutic exercises. It arose from an earlier pilot study comparing EMG biofeedback with physical therapy from which it was concluded that both the elapsed time since the acute stroke and the severity of residual disability were particularly important factors. Of 29 patients included and randomly assigned to one or the other heavily systematized therapies, 18 were classified as having early-severe and 11 as late-mild conditions. Multiple function tests by a "blinded" special technician in another location revealed that overall both forms of therapy obtained worthwhile clinical and statistical improvement, which was maintained at nine-month recheck testing; but there was no statistically significant superiority of one therapy over the other under the very specific circumstances of the research design. Ease of delivering care and other socioeconomic considerations become important factors in choosing either or both of these methods.