A Socially Assistive Robot Exercise Coach for the Elderly

Fasola & Matarić. A SAR Exercise Coach for the ElderlyTable 4. Means, standard deviations, and intercorrelations among dependentmeasures.DependentMeasureGesturecompletion timein secondsPercentage ofgestures wherefeedback wasrequiredTotal exercisesperformed insessionMaximum scorein MemorygameMean(Std. Dev.)CompletionTime2.54 (.89) 1.00FeedbackPercentage8.2% (7.9) .91 1.00TotalExercises100 (18.6) .78 .76 1.00MaximumScore3.11 (1.35) .24 .32 .50 1.00displays the intercorrelations of the four measures, along with the unstandardized meansand standard deviations.To evaluate performance across sessions, we performed a mixed models (multilevel)analysis of variance on the standardized scores of the measures within eachsession. Session is a within-subject factor. Condition, such as whether a physical orvirtual robot led the task, is a between-groups measure. The effect of multiple measureson the same participants was controlled for. The analysis showed that, overall, there is nocondition main effect, but there is a session main effect (performance improved overtime), and there is a significant interaction of condition with session (F[3, 465] = 4.0, p