Nicholas J A, Sapega A, Kraus H, Webb J N
J Bone Joint Surg Am. 1978 Mar;60(2):186-90.
To determine whether it is the amount or the duration of the force applied manually by the tester, or both, that determines the tester's perception of the strength of the hip flexor or abductor muscles, an electromechanical device was designed which was placed between the tester's hand and the subject's limb. With the device we measured the force applied to the limb, the time interval during which it was applied, and the angular position of the limb during the entire test. In 240 such tests, the testers' ratings of the differences in strength between the right and left sides were correlated with seven variables involving force and time. It was found statistically that the impluse--that is, the duration of the tester's effort multiplied by the average applied force during each test--was the factor that most influenced the tester in the ratings.
为了确定是测试者手动施加的力的大小、持续时间，还是两者共同决定测试者对髋屈肌或外展肌力量的感知，设计了一种机电装置，将其置于测试者的手与受试者的肢体之间。借助该装置，我们测量了施加在肢体上的力、施加力的时间间隔以及整个测试过程中肢体的角位置。在240次这样的测试中，测试者对左右两侧力量差异的评分与涉及力和时间的七个变量相关。从统计学上发现，冲量——即测试者每次用力的持续时间乘以平均施加力——是在评分中对测试者影响最大的因素。
