Morrison Craig S, Knudson Duane, Clayburn Colby, Haywood Philip
Southern Utah University, USA.
Percept Mot Skills. 2005 Jun;100(3 Pt 1):599-606. doi: 10.2466/pms.100.3.599-606.
A descriptive study to document undergraduate physical education majors' (22.8 +/- 2.4 yr. old) estimates of sagittal plane elbow angle and angular velocity of elbow flexion visually was performed. 42 subjects rated videotape replays of 30 movements organized into three speeds of movement and two criterion elbow angles. Video images of the movements were analyzed with Peak Motus to measure actual values of elbow angles and peak angular velocity. Of the subjects 85.7% had speed ratings significantly correlated with true peak elbow angular velocity in all three angular velocity conditions. Few (16.7%) subjects' ratings of elbow angle correlated significantly with actual angles. Analysis of the subjects with good ratings showed the accuracy of visual ratings was significantly related to speed, with decreasing accuracy for slower speeds of movement. The use of criterion movements did not improve the small percentage of novice observers who could accurately estimate body angles during movement.
开展了一项描述性研究，以记录本科体育专业学生（22.8±2.4岁）通过视觉对矢状面肘关节角度和肘关节屈曲角速度的估计。42名受试者对30个动作的录像回放进行评分，这些动作分为三种运动速度和两个标准肘关节角度。使用Peak Motus分析动作的视频图像，以测量肘关节角度和峰值角速度的实际值。在所有三种角速度条件下，85.7%的受试者的速度评分与真实的峰值肘关节角速度显著相关。很少有受试者（16.7%）对肘关节角度的评分与实际角度显著相关。对评分良好的受试者的分析表明，视觉评分的准确性与速度显著相关，运动速度越慢，准确性越低。使用标准动作并没有提高能够在运动过程中准确估计身体角度的新手观察者的比例。
