Effects of magnitude and phase cues on human motor adaptation

Recent findings have shown that humans can adapt their internal control model to account for the changing dynamics of systems they manipulate. In this paper, we explore the effects of magnitude and phase cues on human motor adaptation. In our experiments, participants excite virtual second-order systems at resonance via a two-degree of freedom haptic interface, with visual and visual plus haptic feedback conditions. Then, we change the virtual system parameters and observe the resulting motor adaptation in catch trials. Through four experimental conditions we demonstrate the effects of magnitude and phase cues on human motor adaptation. First, we show that humans adapt to a nominal virtual system resonant frequency. Second, humans shift to higher and lower natural frequencies during catch trials regardless of feedback modality and force cues. Third, participants can detect changes in natural frequency when gain, magnitude, and phase cues are manipulated independently. Fourth, particip...

• Type: Conference
• Year: 2009
• Where: HAPTICS
• Authors: Ali Israr, Hakan Kapson, Volkan Patoglu, Marcia Kilchenman O'Malley
• Keywords: HAPTICS 2009, Human Motor Adaptation, Motor Adaptation, Phase Cues, Virtual Reality